US20010051592A1 - Alkaline preparations of Inula for the control of fungal diseases in plants - Google Patents

Alkaline preparations of Inula for the control of fungal diseases in plants Download PDF

Info

Publication number
US20010051592A1
US20010051592A1 US09/781,164 US78116401A US2001051592A1 US 20010051592 A1 US20010051592 A1 US 20010051592A1 US 78116401 A US78116401 A US 78116401A US 2001051592 A1 US2001051592 A1 US 2001051592A1
Authority
US
United States
Prior art keywords
inula
shoots
portions
plants
consisting essentially
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US09/781,164
Other versions
US6423352B2 (en
Inventor
Yigal Cohen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inulex Ltd
Original Assignee
Agrogene Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agrogene Ltd filed Critical Agrogene Ltd
Priority to US09/781,164 priority Critical patent/US6423352B2/en
Assigned to INULEX LTD. reassignment INULEX LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AGROGENE, LTD.
Publication of US20010051592A1 publication Critical patent/US20010051592A1/en
Priority to US10/178,768 priority patent/US20030104086A1/en
Application granted granted Critical
Publication of US6423352B2 publication Critical patent/US6423352B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N65/00Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A01N65/08Magnoliopsida [dicotyledons]
    • A01N65/12Asteraceae or Compositae [Aster or Sunflower family], e.g. daisy, pyrethrum, artichoke, lettuce, sunflower, wormwood or tarragon

Definitions

  • the subject invention relates an anti-fungal preparation for the control of fungal diseases in plants, more specifically, to alkaline extracts of Inula which are highly active in controlling diseases caused by fungi in crop plants.
  • Extracts of plants which are members of the Inula species are effective against infections of plants caused by a variety of fungi. These extracts are typically prepared by dipping freshly cut Inula shoots in an organic solvent or by agitating freshly cut or dried Inula shoots in an organic solvent, removing the solvent to form a paste, and then dissolving the paste in an organic solvent or in water, possibly with an additive.
  • suspensions of Inula can be prepared by grinding dried Inula shoots into a fine powder, adding an emulsifier, and then suspending the mixture in water. In both cases, the resultant preparation is then applied to plants resulting in the control of a wide variety of fungal diseases. Extracts of suspensions of Inula plants are effective at low concentrations, in the range of fractions of a single percent of extract, such that dilute concentrations have excellent fungal-control properties.
  • 5,837,753 disclosed either briefly dipping the leaves and stems of the shoots of Inula viscosa or Inula graveolens into an organic solvent or shaking the freshly cut or dried and ground leaves and stems of the shoots in an organic solvent for thirty minutes, and then evaporating the solvent to form a paste.
  • the yield obtained by this method can be as much as 30%, in contrast to the low yields known in the literature and described above.
  • Inula extracts The medicinal properties of Inula extracts in humans are well known.
  • Debat disclosed the anti-microbial activity of extracts of Inula for use in human beings.
  • the fungicidal effects of Inula extracts have only been demonstrated on fungi growing in Petri dishes or on post-harvest of fruits.
  • Qasem et al. Phytopathologia Mediterana, 34:7-14, 1995
  • the method of the present invention uses Inula extracts prepared with alkaline aqueous solvents used against fungal infections of crop plants themselves.
  • a method for preparing an aqueous extract from Inula species which comprises contacting shoots and/or portions thereof with an alkaline aqueous solvent to form a solution and debris, and removing the debris from the solution.
  • a method for protecting plants against fungal infection comprising preparing a fungicidal extract of Inula species by contacting shoots and/or portions thereof with an alkaline aqueous solvent to form an extract solution and debris, and applying a fungicidally effective amount of the fungicidal extract to a plant for protecting the plant against fungal infection.
  • a method for preparing a fungicide derived from Inula species which comprises combining a substantially powdered form of Inula shoots and/or portions thereof with a solid chemical to form a mixture which upon dissolution of the mixture in an aqueous solvent, forms an alkaline aqueous solution which can be directly applied to plants to prevent fungal infection.
  • an alkaline anti-fungal composition which comprises Inula shoots and/or portions thereof and a compound which when mixed with an aqueous solvent forms an alkaline solution, whereby the composition can be directly applied to plants to prevent fungal infection.
  • the subject invention provides a method for unexpectedly producing an anti-microbial extract from Inula plants which is not only active in vitro against fungi but also is active against diseases caused by fungi in crop plants while being safe to apply to the crop itself.
  • the present invention provides a method for preparing an extract from Inula species including the steps of contacting shoots and/or portions thereof with an alkaline aqueous solvent to form a solution and debris and then removing the debris from the solution.
  • the portion and/or portions of the Inula plant which are utilized in the present invention are the leaves and stem of the upper, younger parts of the shoots, and the upper part of the shoot extending from about 20-40 centimeters from the tip of the shoot.
  • the flowers themselves are not used.
  • the term “shoot” is used to define the leaves and stem of the shoot of the Inula plant.
  • the shoots or portions thereof can be either freshly cut or may be dried prior to the addition of the alkaline aqueous solvent.
  • the alkaline aqueous solvent can include any compound or compounds which alone or in solution have a pH which is greater than about seven such as an inorganic base or salt thereof.
  • the alkaline aqueous solvent includes at least one of amino compound.
  • the amino compound can include an ammonium compound, organic amines and/or heterocyclic amines.
  • the organic amines can include compounds such as ethylamine, ethylenediamine, diaminopropane, diethanolamine, triethanolamine, and butylamnine.
  • Heterocyclic compounds can include compounds such as piperazine and piperidine.
  • the removal of the debris from the solution can be accomplished by filtering the debris from the solution utilizing a screen such as a 100 micron ⁇ m (micron) sieve or other suitable filtering devices known to those skilled in the art.
  • a screen such as a 100 micron ⁇ m (micron) sieve or other suitable filtering devices known to those skilled in the art.
  • the dried shoots and/or portions thereof can be ground, by various means known to those skilled in the art, to form a powder.
  • fresh Inula shoots are dipped in the alkaline solution for an appropriate period of time, typically for approximately 0.2-5 minutes.
  • the plant material is then discarded and the solution, which may be colored, obtained therefrom is screened through a filter such as a 100 micron sieve and can be applied, as is, for spraying crop plants.
  • fresh shoots are first air dried at 30-40° C. for period of time sufficient to dry the shoots, typically approximately 1-2 days and the dried shoots then dipped in the alkaline solution for a period of time which can be approximately 1-10 minutes. The plant material is discarded and the solution (colored) obtained can be filtered through a filter or sieve and then utilized, as is, for spraying crop plants.
  • dried shoots obtained by air drying as described immediately above can be ground and then passed through a metal sieve (i.e., 2 mm).
  • the ground plant material can then be shaken in an alkaline solution for 1-10 minutes, screened through a filtering device such as a 100 micron sieve, and the colored liquid obtained therefrom can be utilized for spraying crop plants.
  • dried and ground plant material as immediately described above can be placed in a mortar and is milled to less than 100 micron-sized particles to obtain a fine powder.
  • the powder is then mixed with an alkaline solution and can be sprayed, as such, onto the crop plants.
  • dried powder which is ground to less than 100 micron-sized particles is milled with crystallized cellulose (Avicel PH-101, Fluka) and is then mixed with the alkaline solution and sprayed directly onto crop plants.
  • crystallized cellulose Avicel PH-101, Fluka
  • a dried powder which has been milled to less than 100 micron-sized particles is milled with a surfactant such as Vercoryl-S, diatomaceous earth, or sodium dodecyl sulfate and is then mixed with the alkaline solution and is sprayed directly onto the crop plants.
  • a surfactant such as Vercoryl-S, diatomaceous earth, or sodium dodecyl sulfate
  • dried Inula shoots ground to less then 100 micron-sized particles are mixed with a solid chemical, which upon dissolution in water, produces an alkaline solution.
  • the solid chemical can be any of the compounds described above for the alkaline solution including an imidazole, dibasic ammonium phosphate, Trizma-base (Sigma) either with or without the addition of an inert surfactant formulation.
  • the powder mixture is then mixed with water to form an anti-fungal agent and is sprayed directly onto crop plants.
  • the anti-fungal agent can be prepared and/or sold as a dry mix which, when hydrated, forms an anti-fungal composition which can be easily applied to plants. In this form, the costs of shipping and/or transporting the anti-fungal material can be reduced since the water would only be added just prior to use/application to plants.
  • the dried and ground Inula of particle size less than 100 microns can be mixed with (NH 4 ) 2 HPO 4 (dibasic ammonium phosphate) and be suspended in water to which NH 4 OH is added. This solution can then be sprayed directly onto crop plants.
  • NH 4 ) 2 HPO 4 dibasic ammonium phosphate
  • a method for protecting plants against fungal infections by the steps of (a) preparing a fungicidal extract of Inula species by contacting shoots and/or portions thereof with an alkaline aqueous solvent to form an extract solution and debris and (b) applying a fungicidally effective amount of the fungicidal extract to a plant for protecting a plant against fungal infection.
  • a fungicidally effective amount includes such an amount that is capable of preventing, inhibiting, and/or killing fungus in or on a plant.
  • Solutions or emulsions containing the Inula extract, or the Inula suspension are sprayed onto the upper leaf surfaces of various crop plants by well known techniques for the control of fungal plant infections.
  • the Inula extracts of the present invention can be used to control fungal plant infections caused by fungi including, but not limited to, Oomycetes, Ascomycetes, Basidiomycetes, and Fungi imperfecti classes.
  • the method and fungicidal extracts of the present invention are particularly suitable for use against fungi of the Oomycetes, Ascomycetes, Basidiomycetes and Fungi imperfecti classes including but not limited to Phytophthora infestans, Pseudoperonospora cubensis, Plasmopara viticola, Sphaerotheca fuliginea, Cladosporium cucumerinum, Erysiphe graminis, Uromyces appendiculatus , and Botrytis cinera and in crops including, but not limited to, grapevines, tomato, wheat, barley, tobacco, potatoes, onions, cucurbits, beans and crucifers.
  • a method for preparing a fungicide derived from Inula species which includes combining a substantially powdered form of Inula shoots and/or portions thereof with a solid chemical to form a mixture which upon dissolution of the mixture and an aqueous solution, forms an alkaline aqueous solution which can be directly applied to plants to prevent fungal infection.
  • Fungicides prepared by this method are described above and in the Example section below.
  • an alkaline anti-fungal composition of Inula shoots and/or portions thereof and a compound which when mixed with an aqueous solvent forms an alkaline solution which can be directly applied to plants to prevent fungal infection is disclosed.
  • the compounds which can be mixed with an aqueous solution to form an alkaline solution are described above and in the Examples section below.
  • % control of the disease [1 ⁇ (% infection and treated plants/% infection in control plants)] ⁇ 100.
  • crop plant pathogen disease Tomato Phytophthora infestans late blight Potato ′′ ′′ Cucumber Pseudoperonospora cubensis downy mildew Melon ′′ ′′ Wheat Erysiphe graminis tritici powdery mildew Cucumber Sphaerotheca fuliginea ′′ Melon ′′ ′′ Tobacco Perenospora tabacina downy mildew Grapes Plasmpara viticola ′′ Tomato Botrytis cinerea gray mold Cucumber ′′ ′′ Tomato Cladosporium fulvum leaf mold
  • Inoculation with P. infestants, P. cubensis, P. tabacina, P. viticola, B. cinera and C. fulvum was done by spraying a spore suspension in distilled water onto the upper leaf surfaces of the treated (and the control) plants. Inoculated plants were kept in a dew chamber at 18-20° C. in the dark for 16-20 hours and then in a growth chamber at 20° C. with 12 hours photoperiod. Inoculation with E. graminis and S. fuliginea was done by blowing spores over the treated (and control) plants. Inoculated plants were then kept in a growth chamber as above.
  • 0.5 ml extract (see Example 8) was pipetted onto a 9 cm diam petri dish containing 10 ml Potato Dextrose Agar. Dishes were exposed to aerial contamination for ten minutes. Dishes incubated at 25° C. for four days until data were collected.
  • composition of a 50 WP formulation of Inula shoots and its activity against fungal plant diseases Composition of a 50 WP formulation of Inula shoots and its activity against fungal plant diseases.
  • composition of a 50 WP formulation of Inula shoots and its activity against fungal plant diseases Composition of a 50 WP formulation of Inula shoots and its activity against fungal plant diseases.
  • composition of 45 WP formulation of Inula shoots and its activity against fungal plant diseases Composition of 45 WP formulation of Inula shoots and its activity against fungal plant diseases.
  • composition [0086]
  • composition of 50 WP formulation of Inula shoots and its activity against fungal plant diseases Composition of 50 WP formulation of Inula shoots and its activity against fungal plant diseases.
  • composition of 50 WP formulation of Inula shoots and its activity against fungal plant diseases Composition of 50 WP formulation of Inula shoots and its activity against fungal plant diseases.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Natural Medicines & Medicinal Plants (AREA)
  • Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Agronomy & Crop Science (AREA)
  • Botany (AREA)
  • Mycology (AREA)
  • Plant Pathology (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

Rapid, convenient and inexpensive methods for preparing fungicidal suspensions from Inula are described. Methods for controlling fungal disease and crops by using alkaline solutions are also disclosed.

Description

  • This application claims priority of U.S. Provisional Application Ser. No. 60/072,356 filed Jan. 23, 1998.[0001]
  • FIELD OF THE INVENTION
  • The subject invention relates an anti-fungal preparation for the control of fungal diseases in plants, more specifically, to alkaline extracts of Inula which are highly active in controlling diseases caused by fungi in crop plants. [0002]
  • BACKGROUND OF THE INVENTION
  • Extracts of plants which are members of the Inula species are effective against infections of plants caused by a variety of fungi. These extracts are typically prepared by dipping freshly cut Inula shoots in an organic solvent or by agitating freshly cut or dried Inula shoots in an organic solvent, removing the solvent to form a paste, and then dissolving the paste in an organic solvent or in water, possibly with an additive. Alternatively, suspensions of Inula can be prepared by grinding dried Inula shoots into a fine powder, adding an emulsifier, and then suspending the mixture in water. In both cases, the resultant preparation is then applied to plants resulting in the control of a wide variety of fungal diseases. Extracts of suspensions of Inula plants are effective at low concentrations, in the range of fractions of a single percent of extract, such that dilute concentrations have excellent fungal-control properties. [0003]
  • The plants which are the basis of these fungicidal extracts and suspensions are [0004] Inula viscosa and Inula graveolens (Family Compositae), perennial weeds widespread in the Mediterranean Basin.
  • Methods of preparing aqueous extracts from various parts of the Inula plant are well known in the literature. Additionally, organic extracts of the Inula plant are also well known in the art, e.g., U.S. Pat. No. 5,837,253. However, the prior art indicates that aqueous extracts of Inula shoots are poorly effective against fungal diseases of crop plants whereas extracts made with organic solvents are highly effective anti-fungal agents. [0005]
  • Methods have also been described for using organic solvents to extract Inula plants, but these are clearly distinguished from that disclosed in U.S. Pat. No. 5,837,253. Two of the prior art methods involved contacting the whole Inula plant, or the aerial parts thereof, with an organic solvent either by maceration of the plant in the organic solvent or by percolation of the solvent through the plant. Furthermore, U.S. Pat. No. 4,254,112 to Debat et al., (hereinafter referred to as “Debat”) describes the preparation of extracts of [0006] Inula viscosa and Inula graveolens using whole Inula plants which have been dried and ground and organic solvents, by using a Soxhlet apparatus. The yield of the paste obtained by this method was approximately 1.75-4%. U.S. Pat. No. 5,176,193 to Honerlagen et al. (hereinafter referred to as “Honerlagen”) describes a process for preparing a partial extract from roots of Inula helenium which involves contacting the plant material with an organic solvent, adding a drying agent to the solution to remove the water, removing the drying agent, and then distilling the dried organic phase. By contrast, the method disclosed in U.S. Pat. No. 5,837,753 disclosed either briefly dipping the leaves and stems of the shoots of Inula viscosa or Inula graveolens into an organic solvent or shaking the freshly cut or dried and ground leaves and stems of the shoots in an organic solvent for thirty minutes, and then evaporating the solvent to form a paste. The yield obtained by this method can be as much as 30%, in contrast to the low yields known in the literature and described above.
  • The medicinal properties of Inula extracts in humans are well known. For example, Debat disclosed the anti-microbial activity of extracts of Inula for use in human beings. However, the fungicidal effects of Inula extracts have only been demonstrated on fungi growing in Petri dishes or on post-harvest of fruits. For example, Qasem et al. ([0007] Phytopathologia Mediterana, 34:7-14, 1995) demonstrated that the growth of certain fungi in Petri dishes was inhibited by aqueous extracts of Inula viscosa as well as by dried plant material added directly to the fungal growth media. By contrast, the method of the present invention uses Inula extracts prepared with alkaline aqueous solvents used against fungal infections of crop plants themselves.
  • Clearly, although Inula extracts have been shown to have fungicidal activity in the Petri dish (in vitro) and on plant (in vivo), the methods of preparation for these extracts have not been sufficient for large scale use directly on crop plants and have had other serious disadvantages. The true effectiveness of these extracts against fungal infections of plants is, therefore, unknown. Furthermore, there is a clear need for better methods to prepare Inula extracts. Qasem et al. (Ibid, page 13, 1995) concluded: “The diversity and the methodology of extraction and the differences in the results obtained . . . increased the need for developing more efficient, convenient, and cheaper methods of extraction to facilitate more extensive utilization of fungicidal extracts, especially if greater quantity of extracts must be prepared for large-scale production”. [0008]
  • Thus, there is a widely recognized need for and would be highly advantageous to have a method or methods for preparing extracts and/or suspensions of plants of Inula species which would facilitate the large-scale use of these extracts and suspensions which would simplify their preparation and use, be highly effective in controlling fungal infection in plants, as well as controlling fungal infections in crop plants. [0009]
  • SUMMARY OF THE INVENTION
  • According to the present invention, there is provided a method for preparing an aqueous extract from Inula species which comprises contacting shoots and/or portions thereof with an alkaline aqueous solvent to form a solution and debris, and removing the debris from the solution. [0010]
  • There is also provided a method for protecting plants against fungal infection comprising preparing a fungicidal extract of Inula species by contacting shoots and/or portions thereof with an alkaline aqueous solvent to form an extract solution and debris, and applying a fungicidally effective amount of the fungicidal extract to a plant for protecting the plant against fungal infection. [0011]
  • There is also provided in accordance with the present invention, a method for preparing a fungicide derived from Inula species which comprises combining a substantially powdered form of Inula shoots and/or portions thereof with a solid chemical to form a mixture which upon dissolution of the mixture in an aqueous solvent, forms an alkaline aqueous solution which can be directly applied to plants to prevent fungal infection. [0012]
  • Additionally, also in accordance with the present invention, there is provided an alkaline anti-fungal composition which comprises Inula shoots and/or portions thereof and a compound which when mixed with an aqueous solvent forms an alkaline solution, whereby the composition can be directly applied to plants to prevent fungal infection. [0013]
  • Accordingly, the subject invention provides a method for unexpectedly producing an anti-microbial extract from Inula plants which is not only active in vitro against fungi but also is active against diseases caused by fungi in crop plants while being safe to apply to the crop itself. [0014]
  • DETAILED DESCRIPTION OF THE INVENTION
  • The present invention provides a method for preparing an extract from Inula species including the steps of contacting shoots and/or portions thereof with an alkaline aqueous solvent to form a solution and debris and then removing the debris from the solution. [0015]
  • Preferably, the portion and/or portions of the Inula plant which are utilized in the present invention are the leaves and stem of the upper, younger parts of the shoots, and the upper part of the shoot extending from about 20-40 centimeters from the tip of the shoot. The flowers themselves are not used. As used herein, the term “shoot” is used to define the leaves and stem of the shoot of the Inula plant. In the methods of the present invention, the shoots or portions thereof can be either freshly cut or may be dried prior to the addition of the alkaline aqueous solvent. [0016]
  • The alkaline aqueous solvent can include any compound or compounds which alone or in solution have a pH which is greater than about seven such as an inorganic base or salt thereof. [0017]
  • Preferably, the alkaline aqueous solvent includes at least one of amino compound. The amino compound can include an ammonium compound, organic amines and/or heterocyclic amines. The organic amines can include compounds such as ethylamine, ethylenediamine, diaminopropane, diethanolamine, triethanolamine, and butylamnine. Heterocyclic compounds can include compounds such as piperazine and piperidine. [0018]
  • The removal of the debris from the solution can be accomplished by filtering the debris from the solution utilizing a screen such as a 100 micron μm (micron) sieve or other suitable filtering devices known to those skilled in the art. [0019]
  • If dried shoots and/or portions thereof are utilized in the method of the present invention, the dried shoots and/or portions thereof can be ground, by various means known to those skilled in the art, to form a powder. [0020]
  • In an embodiment of the invention, fresh Inula shoots are dipped in the alkaline solution for an appropriate period of time, typically for approximately 0.2-5 minutes. The plant material is then discarded and the solution, which may be colored, obtained therefrom is screened through a filter such as a 100 micron sieve and can be applied, as is, for spraying crop plants. [0021]
  • In another embodiment, fresh shoots are first air dried at 30-40° C. for period of time sufficient to dry the shoots, typically approximately 1-2 days and the dried shoots then dipped in the alkaline solution for a period of time which can be approximately 1-10 minutes. The plant material is discarded and the solution (colored) obtained can be filtered through a filter or sieve and then utilized, as is, for spraying crop plants. [0022]
  • In another embodiment, dried shoots obtained by air drying as described immediately above can be ground and then passed through a metal sieve (i.e., 2 mm). The ground plant material can then be shaken in an alkaline solution for 1-10 minutes, screened through a filtering device such as a 100 micron sieve, and the colored liquid obtained therefrom can be utilized for spraying crop plants. [0023]
  • In yet another embodiment, dried and ground plant material as immediately described above, can be placed in a mortar and is milled to less than 100 micron-sized particles to obtain a fine powder. The powder is then mixed with an alkaline solution and can be sprayed, as such, onto the crop plants. [0024]
  • In another embodiment, dried powder which is ground to less than 100 micron-sized particles is milled with crystallized cellulose (Avicel PH-101, Fluka) and is then mixed with the alkaline solution and sprayed directly onto crop plants. [0025]
  • In another embodiment, a dried powder which has been milled to less than 100 micron-sized particles is milled with a surfactant such as Vercoryl-S, diatomaceous earth, or sodium dodecyl sulfate and is then mixed with the alkaline solution and is sprayed directly onto the crop plants. [0026]
  • In another embodiment, dried Inula shoots ground to less then 100 micron-sized particles are mixed with a solid chemical, which upon dissolution in water, produces an alkaline solution. The solid chemical can be any of the compounds described above for the alkaline solution including an imidazole, dibasic ammonium phosphate, Trizma-base (Sigma) either with or without the addition of an inert surfactant formulation. The powder mixture is then mixed with water to form an anti-fungal agent and is sprayed directly onto crop plants. In this form, the anti-fungal agent can be prepared and/or sold as a dry mix which, when hydrated, forms an anti-fungal composition which can be easily applied to plants. In this form, the costs of shipping and/or transporting the anti-fungal material can be reduced since the water would only be added just prior to use/application to plants. [0027]
  • In another embodiment, the dried and ground Inula of particle size less than 100 microns can be mixed with (NH[0028] 4)2HPO4 (dibasic ammonium phosphate) and be suspended in water to which NH4OH is added. This solution can then be sprayed directly onto crop plants.
  • According to the present invention, there is also provided a method for protecting plants against fungal infections by the steps of (a) preparing a fungicidal extract of Inula species by contacting shoots and/or portions thereof with an alkaline aqueous solvent to form an extract solution and debris and (b) applying a fungicidally effective amount of the fungicidal extract to a plant for protecting a plant against fungal infection. As defined herein, a fungicidally effective amount includes such an amount that is capable of preventing, inhibiting, and/or killing fungus in or on a plant. [0029]
  • Solutions or emulsions containing the Inula extract, or the Inula suspension, are sprayed onto the upper leaf surfaces of various crop plants by well known techniques for the control of fungal plant infections. The Inula extracts of the present invention can be used to control fungal plant infections caused by fungi including, but not limited to, Oomycetes, Ascomycetes, Basidiomycetes, and Fungi imperfecti classes. [0030]
  • The method and fungicidal extracts of the present invention are particularly suitable for use against fungi of the Oomycetes, Ascomycetes, Basidiomycetes and Fungi imperfecti classes including but not limited to [0031] Phytophthora infestans, Pseudoperonospora cubensis, Plasmopara viticola, Sphaerotheca fuliginea, Cladosporium cucumerinum, Erysiphe graminis, Uromyces appendiculatus, and Botrytis cinera and in crops including, but not limited to, grapevines, tomato, wheat, barley, tobacco, potatoes, onions, cucurbits, beans and crucifers.
  • Also according to the present invention, there is provided a method for preparing a fungicide derived from Inula species which includes combining a substantially powdered form of Inula shoots and/or portions thereof with a solid chemical to form a mixture which upon dissolution of the mixture and an aqueous solution, forms an alkaline aqueous solution which can be directly applied to plants to prevent fungal infection. Fungicides prepared by this method are described above and in the Example section below. [0032]
  • Also in accordance with the present invention, an alkaline anti-fungal composition of Inula shoots and/or portions thereof and a compound which when mixed with an aqueous solvent forms an alkaline solution which can be directly applied to plants to prevent fungal infection is disclosed. The compounds which can be mixed with an aqueous solution to form an alkaline solution are described above and in the Examples section below. [0033]
  • The invention of the present invention is illustrated below in the following Examples which describe the preparation and use of Inula extracts and suspensions against fungal infections in plants. [0034]
  • To test the efficacy of these extracts and suspensions, experiments were performed in which plants were sprayed using a fine glass atomizer with either Inula extract or with pure solvent as a control for the Inula extracts, with either Inula extract and emulsifier or with an emulsifier solution as a control for the emulsified Inula extracts, and with either Inula suspension or with water or emulsifier solution as a control for the Inula suspensions. Treated and control plants were then inoculated with a crop-respective fungal pathogen. After an incubation period, the extent of the infection was measured. Unless otherwise stated, percentage protection from the disease due to the treatment with the Inula extract or suspension was calculated as: [0035]
  • % control of the disease=[1−(% infection and treated plants/% infection in control plants)]×100.
  • The following experimental data illustrate the utility of the fungicidal compositions of the present invention. [0036]
  • EXAMPLES
  • Methods: [0037]
  • The crop plants and pathogens used for inoculation are described in the following list. [0038]
    crop plant pathogen disease
    Tomato Phytophthora infestans late blight
    Potato
    Cucumber Pseudoperonospora cubensis downy mildew
    Melon
    Wheat Erysiphe graminis tritici powdery mildew
    Cucumber Sphaerotheca fuliginea
    Melon
    Tobacco Perenospora tabacina downy mildew
    Grapes Plasmpara viticola
    Tomato Botrytis cinerea gray mold
    Cucumber
    Tomato Cladosporium fulvum leaf mold
  • Inoculation with [0039] P. infestants, P. cubensis, P. tabacina, P. viticola, B. cinera and C. fulvum was done by spraying a spore suspension in distilled water onto the upper leaf surfaces of the treated (and the control) plants. Inoculated plants were kept in a dew chamber at 18-20° C. in the dark for 16-20 hours and then in a growth chamber at 20° C. with 12 hours photoperiod. Inoculation with E. graminis and S. fuliginea was done by blowing spores over the treated (and control) plants. Inoculated plants were then kept in a growth chamber as above.
  • Disease records were visually estimated in the inoculated plants at 3-13 days after inoculation, depending on the crop and disease. Percentage leaf area occupied with disease symptoms or fungal colonies was recorded and given in the results section. [0040]
  • Example 1
  • Activity of dipping extract of fresh Inula shoots in 0.1 N NaOH for ten minutes on disease development in crop plants. [0041]
    % Diseased leaf
    area
    powdery mildew
    Extract late blight in potato in wheat
    control untreated 94 63
    original (pH 12.7) 15 24
    diluted:2  9 25
    diluted:4 10 30
    diluted:8  8 50
    original (neutralized to pH 7.2)  5 12
    diluted:2 94 18
    diluted:4 95 25
    diluted:8 95 30
  • 50 g fresh weight shoots were dipped in 250 ml of 0.1 N NaOH for ten minutes. Half of the extract was sprayed (pH 12.7) after various dilutions and the other half was neutralized with HCl to pH 7.2 and then sprayed after various dilutions. Late blight and powdery mildew were inoculated one day after spray and disease records taken after four and eight days, respectively. [0042]
  • Example 2
  • Activity of dipping extracts of fresh Inula shoots in ammonium hydroxide (containing 25% NH[0043] 3 by weight) for ten minutes on late blight development in potato.
    Treatment Diseased leaf area % Protection
    untreated control  98
    NH4OH
    8% 100  0
    (= 2% aqueous NH3)
    4% 100  0
    2% 100  0
    1% 100  0
    Inula in NH4OH
    8%  10 90
    4%  20 80
    2%  50 50
    1%  88 12
  • 60 g fresh weight shoot were dipped in 250 ml NH[0044] 4OH solution for ten minutes. Extracts were sprayed after various dilutions onto potato plants and inoculated with Phytophtera infestants two days later. Disease was recorded four days post inoculation. NH4OH solutions of corresponding concentration were also sprayed for comparison. The % NH4OH throughout the Examples, where appropriate, refers to % from a liquid containing 250 g NH3 per liter. For example, 8% NH4OH means 8 ml of a solution (containing 25% NH3) per 100 ml water. To express % NH4OH as % NH3, should divide by 4. Note: NH4OH was not phytotoxic.
  • Example 3
  • Efficacy of Inula extracts, made by dipping fresh shoots in NH[0045] 4OH for ten minutes, in the control of late blight in potato (a) and powdery mildew in wheat (b).
    % blighted leaf area
    3 d - old extract
    NH4OH conc., % fresh extract 1 d - old extract a b
    untreated control 100 100 100 75
     1  23  63  25 23
     2  5  13  23  1
     4  8  18  8 11
     8  8  10  25 24
    16  3  10  5  6
  • One Inula shoot (10 g fresh weight) was dipped in 50 ml of NH[0046] 4OH of various concentrations for ten minutes and the extract sprayed onto potato plants one or three days later. Plants were inoculated with P. infestants or E. graminis one day later and disease records taken seven days post inoculation.
  • Example 4
  • Activity, after storage, of fresh shoot Inula extract made with ammonium hydroxide against fungal diseases of crop plants. [0047]
    % diseased leaf area
    downy powdery downy
    storage late blight mildew in mildew mildew in
    NH4OH period, in potato, melon in wheat grapes
    conc., % days 5 d 6 d 7 d 10 d
    control 1 98 81 100 50
    untreated
    0.25 38 15 50 20
    0.5 15 4 13 15
    1.0 8 1 1 5
    control 9 98 50
    untreated
    0.25 69 38
    0.5 13 13
    1.0 13 nd
    control 18 75
    untreated
    0.25 nd
    0.5 0
    1.0 0
    0 60 95
    0.25 38
    0.5 21
    1 18
  • 100 g fr. w. shoot were shaken for ten minutes in 1 L of NH[0048] 4OH. Plant material discarded and the extract was sprayed onto the crop plants. nd=not done.
  • Example 5
  • Activity of aqueous or acetone extracts made from dry crushed shoots of Inula against fungal diseases of crop plants. [0049]
    % Diseased leaf area
    downy powdery powdery
    late blight in mildew in mildew in mildew in
    potato cucumber cucumber wheat,
    solvent 4 d 6 d 6 d 8 d
    untreated control 83 88 88 88
    water 18 5 75 63
    KOH 0.1N 88 4 75 63
    NaOH 0.1N 63 28 50 25
    NH4OH 1.4% 1 8 50 13
    NH4OH 7% 3 4 25 15
    (NH4)2HPO4 0.1M 0.3 0 50 3
    (1.3%)
    K2HPO4 0.1M 23*   3 88 20
    Acetone 8 3 25 5
  • 1 g dry crushed shoots were shaken for thirty minutes in 50 ml of the solvent, screened (100μ) and sprayed onto the crop plants. Plants were inoculated one day after spray. *phytotoxic [0050]
  • Example 6
  • Activity of dry crushed Inula shoots extracted with ammonium hydroxide and ammonium phosphate (dibasic) against fungal disease in crop plants. [0051]
    % diseased leaf area
    pow-
    downy dery
    late late mildew mildew powdery
    blight in blight in in cu- in mildew
    solvent, tomato potato cumber wheat in melon*
    conc. pH 4 d 6 d 8 d 11 d 14 d
    None 88 100 100 100 180
    (NH4)2HPO4 7.9 25 14 16 18 150
    1.32% (0.1M)
    NH4OH 10.97 25 22 28 15 55
    0.7% (0.1M)
    (NH4)2HPO2 +
    NH4OH,
    mixed, 0.1M
    9 + 1 8.25 29 5 27 15 80
    7.5 + 2.5 8.6 31 13 16 3 100
    5 + 5 9.0 11 6 6 0 40
    2.5 + 7.5 9.4 20 0 11 1 25
    1 + 9 9.8 16 2 16 8 20
    water 6.2 75 80 58 75 180
    acetone 0 16 11 8 130
  • 1 g crushed dry shoots were shaken for five minutes in 50 ml of solvent, screened and sprayed. Inoculation took place three hours after spray. *Number of fungal colonies per plant. Extracts were used six days after preparation. The molarity of NH[0052] 4OH is based on molecular weight of 35.
  • Example 7
  • Activity of crushed dry Inula shoots extracts made with aqueous solutions of ethylamine and ethylenediamine against fungal diseases of crop plants. [0053]
    Potato late blight cucumber downy
    solvent, conc. and 4 d mildew 6 d
    pH % blighted leaf area lesions/plant
    control untreated 94 125
    ethylamine 0.7% 15  5
    (pH 12.3)
    ethylenediamine 0.6% 50  4
    (pH 11.95)
  • 1 g dry crushed shoots of Inula were shaken for five minutes in 50 ml of the aqueous solvent, screened and sprayed onto the plants. Plants were inoculated one day after spray. [0054]
  • Example 8
  • Activity of alkaline extracts or acetone of fresh Inula shoots against disease development in crop plants. [0055]
    % infected leaf area
    late blight in tomato powdery mildews in
    solvent and conc. 6 d wheat 11 d
    untreated control 88 75
    ethylamine, 1% 0 38
    ethylenediamine, 0.9% 0 38
    ammonium hydroxide, 1% 1 20
    (0.25% NH3 in water)
    2-amino-2-methylpropanole 25 nt
    (AMP) 0.9%
    acetone 0 23
  • 25 g fresh shoots of Inula were dipped for ten minutes in 250 ml of the solvent, and the extracts sprayed onto crop plants. Inoculation took place three hours after spray. [0056]
  • Example 9
  • Sequential extraction of fresh Inula shoots with acetone and ammonium hydroxide and the activity of the extract against plant disease. [0057]
    % infected leaf area
    powdery
    late blight in mildews in
    First solvent Second solvent tomato, 6 d wheat, 11 d
    untreated control 88 75
    NH4OH, 1% 1 20
    acetone 0 23
    NH4OH, 1% acetone 1 25
    acetone NH4OH, 1% 38 75
  • 25 g fresh Inula shoots were dipped for ten minutes in the first solvent. Then washed with water, blotted dry and dipped for ten minutes in the second solvent. Extracts were sprayed onto the crop plants before inoculation. [0058]
  • Example 10
  • Antimicrobial activity, in vitro, of alkaline extracts of fresh Inula shoots. [0059]
    fungal colonies bacterial colonies
    extraction made with per dish per dish
    no extract, control 75 30
    ethylamine, 1% 7 30
    ethylene diamine, 0.9% 10 40
    ammonium hydroxide, 1% 12 15
    acetone (positive control) 4 0
  • 0.5 ml extract (see Example 8) was pipetted onto a 9 cm diam petri dish containing 10 ml Potato Dextrose Agar. Dishes were exposed to aerial contamination for ten minutes. Dishes incubated at 25° C. for four days until data were collected. [0060]
  • Example 11
  • Dose-dependent activity of alkaline extracts made from dry crushed Inula shoots with 1:1 mixture (pH 9.0) of 0.1M (1.32%) (NH[0061] 4)2HPO4 and 0.1M (0.7%) NH4OH, against late blight in tomato.
    g dry shoots blighted leaf area
    per 50 ml solvent %, 4 days
    untreated control 88
    solvent control 88
    0.1 75
    0.2 63
    0.4 25
    0.6 25
    0.8 18
    1 14
    2 3
  • 0.1-2 g dry crushed shoots were shaken for five minutes in 50 ml of the solvent mixture, screened and sprayed. Inoculation took place three hours later. [0062]
  • Example 12
  • Activity of aqueous alkaline extracts made from dry crushed Inula shoots against late blight in tomato. [0063]
    % diseased leaf area
    solvent Inula extract solvent control
    untreated control 81
    piperazine hydrate 0.05M 3 81
    (1%) pH 11.3
    piperazine hydrate 0.1M 3 81
    (2%) pH 11.3
    triethanolamine 0.1M 23 81
    (1.59%) pH 10.3
  • 1 g dry crushed shoots was shaken in 50 ml of the solvent for one hour, screened and sprayed. Plants were inoculated three hours after spray and disease was recorded four days later. [0064]
  • Example 13
  • The effect of concentration of piperazine hydrate on the activity of Inula extracts against late blight in tomato and potato. [0065]
    piperazine hydrate % diseased leaf area
    conc., % tomato potato
    0   91 95
    0.06 18 25
    0.12 11 25
    0.25 4 25
    0.50 18 44
    1.00 0 75
    2.00 (= 0.1M) 8 75
  • 1 g dry crushed Inula shoots was shaken for one hour in 50 ml of piperazine solutions, screened and sprayed. Inoculation was done three hours after spray and disease recorded five days after inoculation. [0066]
  • Example 14
  • Efficacy of tetraethylene or piperidine aqueous solutions on extraction of antifungal components from dry shoots of Inula. [0067]
    % diseased leaf area
    Tomato late cucumber downy wheat powdery
    Treatment blight, 4d mildew, 6d mildew, 10d
    none (control) 88 88 50
    tetraethylene 1% 63 31 50
    (pH 11.2)
    piperidine 1% 88 94 25
    (pH 12.0)
    Inula in tetraethy- 25 47 50
    lene 1%
    Inula in piperidine 1% 25 1 13
  • 1 g dry crushed Inula shoots was shaken for ten minutes in 50 ml of the solvent, screened and sprayed. Inoculation was done three hours after spray. [0068]
  • Example 15
  • Activity of aqueous alkaline or acetone extracts made from Inula shoots against mildews in cucumber and wheat. [0069]
    % diseased leaf area
    downy powdery powdery
    mildew mildew mildew
    in cucumber in cucumber in wheat
    solvent 6d 11d 8d
    untreated control 75 100 100
    Trizma-base ® 20 13 3
    (Sigma) 1%
    piperazine hydrate 1% 18 38 38
    piperadine 1% 5 25 18
    imidazole 1% 0 0 0
    acetone 2 25 25
    (positive control)
  • 1 g dry crushed leaves of Inula was shaken for ten minutes in 50 ml of the solvent, screened and sprayed. Inoculation was done three hours after spray. [0070]
  • Example 16
  • Efficacy of sec-butylamine in extracting antifungal components from dry Inula shoots. [0071]
    lesions
    sec-butyl- per plant % diseased leaf area
    amine late blight in late blight powdery mildew
    conc., % potato 3d tomato 4d cucumber 13d wheat 7d
    0 130 88 88 100
    0.06 60 63 14 23
    0.12 0 25 14 0
    0.25 5 8 9 15
    0.5 0 15 15 3
    1.0 2 3 9 5
    (pH 11.5)
  • 1 g dry crushed Inula shoots was shaken for ten minutes in 50 ml of sec-butylamine, screened and sprayed. Inoculation was done three hours after spray. [0072]
  • Example 17
  • Efficacy of imidazole in extracting antifungal component from dry Inula shoots. [0073]
    % diseased leaf area
    late blight late blight powdery mildew
    Treatment tomato, 5d potato, 5d wheat, 8d
    none 81 100 69
    Imidazole only
    0.12% pH 9.55 95 50 63
    0.25% pH 9.70 88 50 50
     0.5% pH 9.86 69 25 23
      1% pH 9.95 50 18 25
    Inula extract in
    imidazole
    0.12% 30 5 0
    0.25% 20 18 18
     0.5% 30 30 0
     1.0% 30 15 0
    Inula in acetone 5 0 3
  • 1 g of dry crushed Inula shoots was shaken in 50 ml of imidazole for ten minutes, screened and sprayed. Inoculation was done three hours after spray. [0074]
  • Example 18
  • Composition of a 50 WP formulation of Inula shoots and its activity against fungal plant diseases. [0075]
  • Composition: [0076]
  • 5 g dry Inula shoot powder [0077]
  • 2.5 g imidazole [0078]
  • 2.5 g inert carriers and surfactants (Sandoz) [0079]
    Activity % diseased leaf area
    g product per 50 ml late blight late blight powdery mildew
    water pH tomato 5d potato 5d wheat 13d
    0 98 100 38
    0.25 8.20 75 75 25
    0.5 8.21 38 63 13
    0.75 8.22 31 25 0
    1 8.23 23 18 0
    1.25 8.24 20 20 0
    1.5 8.25 15 13 0
    2 8.25 1 10 0
  • Example 19
  • Composition of a 50 WP formulation of Inula shoots and its activity against fungal plant diseases. [0080]
  • Composition: [0081]
  • 5 g dry Inula shoot powder [0082]
  • 3.75 g imidazole [0083]
  • 1.25 g inert carriers and surfactants (Sandoz) [0084]
    Activity % diseased leaf area
    g product per 50 ml late blight late blight powdery mildew
    water pH tomato 4d potato 5d wheat 9d
    0 95 81 38
    0.25 8.28 75 69 25
    0.5 8.29 63 25 0
    0.75 8.32 38 15 0
    1 8.33 25 13 0
    1.25 8.35 21 13 0
    1.5 8.36 13 18 0
    2 8.37 6 8 0
  • Example 20
  • Composition of 45 WP formulation of Inula shoots and its activity against fungal plant diseases. [0085]
  • Composition: [0086]
  • 5 g dry Inula shoot powder [0087]
  • 5 g imidazole [0088]
  • 1 g inert carriers and surfactants (Sandoz) [0089]
    Activity % diseased leaf area
    g product per 50 ml late blight in tomatoes
    water pH 4d
    0 75
    0.25 8.18 75
    0.5 8.23 50
    0.75 8.28 50
    1 8.29 38
    1.5 8.30 25
    2 8.38  3
  • Example 21
  • Composition of 50 WP formulation of Inula shoots and its activity against fungal plant diseases. [0090]
  • Composition: [0091]
  • 5 g dry Inula shoot powder [0092]
  • 2.5 g dibasic ammonium phosphate [0093]
  • 2.5 g Avicel P-101® (Fluka)=crystalline cellulose [0094]
    % diseased leaf area
    Activity late late blight downy mildew powdery
    g product per blight in in potato, in cucumber, mildew in
    50 ml water pH tomato, 4d 6d 6d wheat, 9d
    0 98 98 50  75
    0.1 7.33 75 93 13  75
    0.2 7.44 75 93 8 50
    0.4 7.46 63 38 3 50
    0.6 7.46 63 30 1 25
    0.8 7.46 18 23 3 23
    1 7.46 23 20 0 20
    1.5 7.46 23 18 0 18
  • Example 22
  • Composition of 50 WP formulation of Inula shoots and its activity against fungal plant diseases. [0095]
  • Composition: [0096]
  • 5 g dry Inula shoot powder [0097]
  • 2.5 g Trizma-Base® (Sigma) [0098]
  • 2.5 g Avicel PH-101® (Fluka) [0099]
    Activity % diseased leaf area
    g product per 50 ml late blight late blight in powdery mildew
    water pH tomato, 3d potato, 5d in wheat, 8d
    0 95 95 75
    0.2 8.55 88 95 50
    0.4 8.62 88 93 50
    0.6 8.67 38 69 25
    0.8 8.68 23 38 25
    1 8.70 30 25 25
    1.5 8.72 23 25 25
    2 8.74 25 25 25
  • Example 23
  • Composition of 50 WP formulation of Inula shoots and its activity against fungal plant diseases. [0100]
  • Composition: [0101]
  • 5 g dry Inula shoot powder [0102]
  • 5 g dibasic ammonium phosphate [0103]
    Activity % diseased leaf area
    g product per 50 ml late blight in late blight in potato powdery mildew
    water pH tomato, 4d lesions/plant 3d 4d in wheat, 7d
    0 95 >500  88 88
    0.2 7.42 38 200  69 38
    0.4 7.45 25 180  69 38
    0.6 7.45 23 50 25 23
    0.8 7.45 20 40 25 13
    1 7.46  3 20 20 13
    2 7.47  1  5  8  3
  • Example 24
  • Composition of alkaline wettable powder formulations of Inula used to control plant diseases. [0104]
    Percent Alkaline Other
    Formula a-i agent pH component
    Inula leaves (27%) 25 none 6.8
    Zeofree 80 (60%)
    Polyfon F (3%)
    Synfactant (10%)
    Inula leaves (25%) 25 amines (10%) 7.9
    Zeofree 80 (62%)
    Polyfon F (3%)
    Monoamine 779 (10%)
    Inula leaves (25%) 12.5 triethanolamines 8.5
    Zeofree 80 (95%)
    Stepsperse DF500 (10%)
    Monoamine 779 (20%)
    Triethanolamine (50%)
    Inula leaves (25%) 25 (NH4)2HPO4 (25%) 7.5
    Zeofree 80 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 25 (NH4)2HPO4 (25%) 8
    Hubersorb 600 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 25 (NH4)2HPO4 (25%) 8
    Hubersorb 600 (40%)
    diammonium phosphate (25%)
    Stepan DF 500 (10%)
    Inula leaves (25%) 25 (NH4)2HPO4 (25%) 8
    Hubersorb 600 (24%)
    diammonium phosphate (25%)
    Stepan DF 500 (5%)
    40% Tdet 09 on Zeolex 7A (5%)
  • Example 25
  • Late blight in potato. [0105]
    % infected leaf area 6 days
    Conc. % a-i
    Formulation 0 0.25 0.5 1.0
    Inula leaves (27%) 100 100 100  100 
    Zeofree 80 (60%)
    Polyfon F (3%)
    Synfactant (10%)
    Inula leaves (25%)  50 25 38
    Zeofree 80 (62%)
    Polyfon F (3%)
    Monoamine 779 (10%)
    Inula leaves (25%)  25 25 18
    Zeofree 80 (95%)
    Stepsperse DF500 (10%)
    Monoamine 779 (20%)
    Triethanolamine (50%)
    Inula leaves (25%) 100 69 50
    Zeofree 80 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 100 50 20
    Hubersorb 600 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%)  50 20  0
    Hubersorb 600 (40%)
    diammonium phosphate (25%)
    Stepan DF 500 (10%)
    Inula leaves (25%) 100 88 25
    Hubersorb 600 (24%)
    diammonium phosphate (25%)
    Stepan DF 500 (5%)
    40% Tdet 09 on Zeolex 7A (5%)
  • Example 26
  • Late blight in tomato. Suspensions were used ˜100 hours after preparation. [0106]
    % infected leaf area 4 days
    Conc. % a-i
    Formulation 0 0.25 0.5 1.0
    Inula leaves (27%) 95 88 75 38
    Zeofree 80 (60%)
    Polyfon F (3%)
    Synfactant (10%)
    Inula leaves (25%) 19 15  8
    Zeofree 80 (62%)
    Polyfon F (3%)
    Monoamine 779 (10%)
    Inula leaves (25%) 18  1  0
    Zeofree 80 (95%)
    Stepsperse DF500 (10%)
    Monoamine 779 (20%)
    Triethanolamine (50%)
    Inula leaves (25%) 75 63 25
    Zeofree 80 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 75 63 25
    Hubersorb 600 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 50 38  9
    Hubersorb 600 (40%)
    diammonium phosphate (25%)
    Stepan DF 500 (10%)
    Inula leaves (25%) 75 38 19
    Hubersorb 600 (24%)
    diammonium phosphate (25%)
    Stepan DF 500 (5%)
    40% Tdet 09 on Zeolex 7A (5%)
  • Example 27
  • Downy mildew in cucumber. [0107]
    % infected leaf area 6 days
    Conc. % a-i
    Formulation 0 0.25 0.5 1.0
    Inula leaves (27%) 100 63 38 38
    Zeofree 80 (60%)
    Polyfon F (3%)
    Synfactant (10%)
    Inula leaves (25%) 38 38 10
    Zeofree 80 (62%)
    Polyfon F (3%)
    Monoamine 779 (10%)
    Inula leaves (25%) 20 20 13
    Zeofree 80 (95%)
    Stepsperse DF500 (10%)
    Monoamine 779 (20%)
    Triethanolamine (50%)
    Inula leaves (25%) 50 30 30
    Zeofree 80 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 44 13 13
    Hubersorb 600 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 44  8  8
    Hubersorb 600 (40%)
    diammonium phosphate (25%)
    Stepan DF 500 (10%)
    Inula leaves (25%) 75 63 44
    Hubersorb 600 (24%)
    diammonium phosphate (25%)
    Stepan DF 500 (5%)
    40% Tdet 09 on Zeolex 7A (5%)
  • Example 28
  • Downy mildew in grapes. [0108]
    % sporulating leaf area 8 days
    Conc. % a-i
    Formulation 0 0.25 0.5 1.0
    Inula leaves (27%) 97 60  5  0
    Zeofree 80 (60%)
    Polyfon F (3%)
    Synfactant (10%)
    Inula leaves (25%) 25 25 20
    Zeofree 80 (62%)
    Polyfon F (3%)
    Monoamine 779 (10%)
    Inula leaves (25%) 50 25 15
    Zeofree 80 (95%)
    Stepsperse DF500 (10%)
    Monoamine 779 (20%)
    Triethanolamine (50%)
    Inula leaves (25%) 70 15  0
    Zeofree 80 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 60 20 20
    Hubersorb 600 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 50 25 20
    Hubersorb 600 (40%)
    diammonium phosphate (25%)
    Stepan DF 500 (10%)
    Inula leaves (25%) 80 80 50
    Hubersorb 600 (24%)
    diammonium phosphate (25%)
    Stepan DF 500 (5%)
    40% Tdet 09 on Zeolex 7A (5%)
  • Example 29
  • Powdery mildew in wheat. [0109]
    % infected leaf area 8 days
    Conc. % a-i
    Formulation 0 0.25 0.5 1.0
    Inula leaves (27%) 50 50 25 13
    Zeofree 80 (60%)
    Polyfon F (3%)
    Synfactant (10%)
    Inula leaves (25%) 25 13  0
    Zeofree 80 (62%)
    Polyfon F (3%)
    Monoamine 779 (10%)
    Inula leaves (25%) 25 13  0
    Zeofree 80 (95%)
    Stepsperse DF500 (10%)
    Monoamine 779 (20%)
    Triethanolamme (50%)
    Inula leaves (25%) 38 19 13
    Zeofree 80 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 38 25 13
    Hubersorb 600 (25%)
    diammonium phosphate (25%)
    Reax M100 (5%)
    Kaolin (20%)
    Inula leaves (25%) 30 25  0
    Hubersorb 600 (40%)
    diammonium phosphate (25%)
    Stepan DF 500 (10%)
    inula leaves (25%) 25 25  5
    Hubersorb 600 (24%)
    diammonium phosphate (25%)
    Stepan DF 500 (5%)
    40% Tdet 09 on Zeolex 7A (5%)
  • In view of the teachings presented herein, other modifications and variations of the present inventions will be readily apparent to those of skill in the art. The foregoing discussion, and description are illustrative of some embodiments of the present invention, but are not meant to be limitations on the practice thereof. It is the following claims, including all equivalents, which define the scope of the invention. [0110]
  • Any patents or publications mentioned in this specification are indicative of the levels of those skilled in the art to which the invention pertains. These patents and publications are herein incorporated by reference to the same extent as if each individual publication was specifically and individually indicated to be incorporated by reference. [0111]
  • One skilled in the art will readily appreciate that the present invention is well adapted to carry out the objects and obtain the ends and advantages mentioned, as well as those inherent therein. The present examples along with the methods, procedures, treatments, and specific compositions described herein are presently representative of preferred embodiments, are exemplary, and are not intended as limitations on the scope of the invention. Changes therein and other uses will occur to those skilled in the art which are encompassed within the spirit of the invention as defined by the scope of the claims. [0112]

Claims (38)

What is claimed:
1. A method for preparing an extract from Inula species, said method comprising the steps of:
(a) contacting shoots and/or portions thereof with an alkaline aqueous solvent to form a solution and debris; and
(b) removing the debris from the solution.
2. A method according to
claim 1
, wherein said removing step includes filtering the debris from the solution.
3. A method according to
claim 1
, wherein the shoots include leaves and stems of upper parts of the shoots.
4. A method according to
claim 1
, wherein the shoots or portions thereof are dried prior to said contacting step.
5. A method according to
claim 4
including the step of grinding the dried shoots or portions thereof to form a powder.
6. A method according to
claim 1
, wherein the shoots or portions thereof are freshly cut.
7. A method according to
claim 1
, wherein the alkaline aqueous solvent comprises at least one amino compound.
8. A method according to
claim 7
, wherein the amino compound comprises an ammonium compound.
9. A method according to
claim 7
, wherein the amino compound is selected from the group consisting essentially of organic amines and heterocyclic amines.
10. A method according to
claim 9
, wherein the organic amine compound is selected from the group consisting essentially of ethylamine, ethylenediamine, diaminopropane, diethanolamine, triethanolamine, and butylamine.
11. A method according to
claim 9
, wherein the hetero cyclic amine compound is selected from the group consisting essentially of piperazine and piperidine.
12. A method according to
claim 7
, wherein the alkaline aqueous solvent comprises inorganic bases or salts thereof.
13. A method for protecting plants against fungal infection, said method comprising the steps of:
(a) preparing a fungicidal extract of Inula species by contacting shoots and/or portions thereof with an alkaline aqueous solvent to form an extract solution and debris; and
(b) applying a fungicidally effective amount of the fungicidal extract to a plant for protecting the plant against fungal infection.
14. A method according to
claim 13
, wherein the plant includes grapevines, cucurbits, tomatoes, wheat, barley, onion, tobacco, crucifers, and potatoes.
15. A method according to
claim 13
, wherein the fungal infection is caused by phytopathogenic fungi including Oomycetes, Ascomycetes, Basidiomycetes and Fungi imperfecti classes.
16. A method according to
claim 15
, wherein the fungal infection is caused by a fungus including Cladosporium cucumerinum, Phytophthora infestans, Botrytis cinerea, Pseudoperonospora cubensis, Sphaerothecafuliginea, Plasmopara viticola, Uromyces appendiculatis, and Erysiphe graminis.
17. A method according to
claim 13
, wherein said preparing step includes filtering the debris from the solution.
18. A method according to
claim 13
, wherein the shoots include leaves and stems of upper parts of the shoots.
19. A method according to
claim 13
, wherein the shoots or portions thereof are dried prior to said contacting step.
20. A method according to
claim 19
including the step of grinding the dried shoots or portions thereof to form a powder.
21. A method according to
claim 13
, wherein the shoots or portions thereof are freshly cut.
22. A method according to
claim 13
, wherein the alkaline aqueous solvent comprises at least one amino compound.
23. A method according to
claim 22
, wherein the amino compound comprises an ammonium compound.
24. A method according to
claim 22
, wherein the amino compound is selected from the group consisting essentially of organic amines and heterocyclic amines.
25. A method according to
claim 24
, wherein the organic amine compound is selected from the group consisting essentially of ethylamine, ethylenediamine, diaminopropane, diethanolamine, triethanolamine, and butylamine.
26. A method according to
claim 24
, wherein the heterocyclic amine compound is selected from the group consisting essentially of piperazine and piperidine.
27. A method according to
claim 13
, wherein the alkaline aqueous solvent comprises inorganic bases or salts thereof.
28. A method for preparing a fungicide derived from Inula species, said method comprising the step of:
combining a substantially powdered form of Inula shoots and/or portions thereof with a solid chemical to form a mixture which upon dissolution of the mixture in an aqueous solution, forms an alkaline aqueous solution which can be directly applied to plants to prevent fungal infection.
29. A method according to
claim 28
, wherein the solid chemical comprises at least one amino compound.
30. A method according to
claim 29
, wherein the amino compound comprises an ammonium compound.
31. A method according to
claim 29
, wherein the amino compound is selected from the group consisting essentially of organic amines and heterocyclic amines.
32. A method according to
claim 31
, wherein the organic amine compound is selected from the group consisting essentially of ethylamine, ethylenediamine, diaminopropane, diethanolamine, triethanolamine, and butylamine.
33. A method according to
claim 31
, wherein the heterocyclic compound is selected from the group consisting essentially of piperazine and piperidine.
34. A method according to
claim 28
, wherein the solid chemical comprises inorganic bases or salts thereof.
35. A method according to
claim 28
, wherein an emulsifier is added to the mixture.
36. A method according to
claim 35
, wherein the emulsifier comprises a surfactant.
37. A method according to
claim 36
, wherein the surfactant comprises sodium dodecyl sulfate.
38. A method according to
claim 35
, wherein the emulsifier comprises diatomaceous earth.
US09/781,164 1998-01-23 2001-02-13 Alkaline preparations of Inula for the control of fungal diseases in plants Expired - Fee Related US6423352B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US09/781,164 US6423352B2 (en) 1998-01-23 2001-02-13 Alkaline preparations of Inula for the control of fungal diseases in plants
US10/178,768 US20030104086A1 (en) 1998-01-23 2002-06-25 Alkaline preparaions of Inula for the control of fungal diseases in plants

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US7235698P 1998-01-23 1998-01-23
US23397199A 1999-01-20 1999-01-20
US09/781,164 US6423352B2 (en) 1998-01-23 2001-02-13 Alkaline preparations of Inula for the control of fungal diseases in plants

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US23397199A Division 1998-01-23 1999-01-20

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/178,768 Division US20030104086A1 (en) 1998-01-23 2002-06-25 Alkaline preparaions of Inula for the control of fungal diseases in plants

Publications (2)

Publication Number Publication Date
US20010051592A1 true US20010051592A1 (en) 2001-12-13
US6423352B2 US6423352B2 (en) 2002-07-23

Family

ID=26753281

Family Applications (2)

Application Number Title Priority Date Filing Date
US09/781,164 Expired - Fee Related US6423352B2 (en) 1998-01-23 2001-02-13 Alkaline preparations of Inula for the control of fungal diseases in plants
US10/178,768 Abandoned US20030104086A1 (en) 1998-01-23 2002-06-25 Alkaline preparaions of Inula for the control of fungal diseases in plants

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/178,768 Abandoned US20030104086A1 (en) 1998-01-23 2002-06-25 Alkaline preparaions of Inula for the control of fungal diseases in plants

Country Status (4)

Country Link
US (2) US6423352B2 (en)
AU (1) AU2465699A (en)
IL (1) IL137389A0 (en)
WO (1) WO1999037316A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11319342B2 (en) * 2014-12-11 2022-05-03 Rensselaer Polytechnic Institute Bone protein extraction without demineralization

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20010513A1 (en) * 2001-08-29 2003-03-01 Cosimo Virruso INFUSION OF VISCOUS INULA HAVING PROPERTY AGAINST HEMATOPHAGIC INSECTS AND IN PARTICULAR AGAINST MOSQUITOES.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920844A (en) * 1974-06-10 1975-11-18 Nat Patent Dev Corp Chlorinated diaromatic-substituted aminoalkanes as fungicides and insecticides
US4254112A (en) * 1978-05-31 1981-03-03 Laboratoire Debat Inula extract, its method of preparation and its use as pharmaceutical
US5212183A (en) * 1981-11-14 1993-05-18 Basf Aktiengesellschaft 4-(p-tert.-butylphenyl)-3-methylpiperidines substituted at the nitrogen, their quaternary salts and their use as fungicides
EP0306413A1 (en) * 1987-09-03 1989-03-08 Hokko Chemical Industry Co., Ltd A synergistic fungicidal composition of agricultural and horticultural utilities, and methods for controlling fungal diseases on plants
FR2657011A1 (en) * 1990-01-17 1991-07-19 Secma Use of extracts of seashore plants for the preparation of pharmaceutical, cosmetic or nutrient compositions or compositions for agricultural use
GB9320744D0 (en) * 1992-11-04 1993-12-01 Zeneca Ltd Oxa and thiadiazole derivatives
US5837253A (en) * 1996-07-26 1998-11-17 Agrogene Ltd. Preparation and use of Inula extracts as a fungicide for the control of plant diseases
US6139879A (en) * 1997-06-25 2000-10-31 Foliar Nutrients, Inc. Fungicidal and bactericidal compositions for plants containing compounds in the form of heavy metal chelates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11319342B2 (en) * 2014-12-11 2022-05-03 Rensselaer Polytechnic Institute Bone protein extraction without demineralization

Also Published As

Publication number Publication date
WO1999037316A1 (en) 1999-07-29
US6423352B2 (en) 2002-07-23
AU2465699A (en) 1999-08-09
US20030104086A1 (en) 2003-06-05
IL137389A0 (en) 2001-07-24

Similar Documents

Publication Publication Date Title
EP0230209A2 (en) Microbicides
US9456610B2 (en) Plant extracts for use as phytochemicals
DE3900892A1 (en) CONTAINING TWO OR THREE ACTIVE SUBSTANCES, SYNERGISTICALLY ACTIVE FUNGICIDES AND ACARICIDAL AGENTS
SE447783B (en) FUNGICID PREPARATION CONTAINING A TRIAZOLIC COMPOUND AND A BENZIMIDAZOLE
US5837253A (en) Preparation and use of Inula extracts as a fungicide for the control of plant diseases
US6423352B2 (en) Alkaline preparations of Inula for the control of fungal diseases in plants
BG62835B1 (en) Two- and three-component fungicidal mixtures
JP2801223B2 (en) Fungicide composition
EP2178380B1 (en) A process for the production of a storage stable fungicidal extract of glycyrrhiza glabra for the control of phytopathogenic fungi and other plant diseases
NO156672B (en) PREPARATION WITH ANTIMICROBIAL AND ANY POSSIBLE INSECTICID EFFECT AND USE OF SUCH A PREPARATION AS A TREE AND ANTI-PROTECTIVE AGENT.
EP0151942B1 (en) Diphenyl hydrantoin silver complex and uses thereof
SU722459A3 (en) Fungicidic composition
US5665679A (en) Method of desiccating potato vines with copper alkylenediamine
US20100221363A1 (en) Process for the production of a storage stable fungicidal extract of glycyrrhiza glabra for the control of phytopathogenic fungi and other plant diseases
DE1110942B (en) Systemically acting agent, especially against fungal attack on plants
DE1017405B (en) Fungicidal pesticides with therapeutic efficacy
RU2251844C1 (en) Insecticide preparation for protecting fabric, fur and articles made out of fabric and fur against moth and skin beetles
JP2003095825A (en) Fungicidal composition for agriculture and horticulture and synergistic agent for strobilurin-based fungicide
KR20050106894A (en) Insect natual extract and method for producing the same
SU572170A3 (en) Means for abscission, defoliation and dessication of non-woody parts of plants
US4058613A (en) Quinoline derivatives having fungicidal activity
DD232417C2 (en) AGENTS FOR THE CONTROL OF PHYTOPATHOGENIC BACTERIA AND MUSHROOMS
JPH04297402A (en) Agent for decreasing oxalic acid content of vegetable and decreasing method
DD226756A5 (en) SYNERGISTIC MULTICOMPONENT PRACTICE FOR CONTROLLING THE MUSHROOMS OF CEREALS
KR100420758B1 (en) Photostabilized Fungicide That Contains Ethaboxam and its Photostabilizer, Method for Fungicidal Use and Method for Increasing Photostability of Ethaboxam

Legal Events

Date Code Title Description
AS Assignment

Owner name: INULEX LTD., ISRAEL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AGROGENE, LTD.;REEL/FRAME:011914/0126

Effective date: 20010612

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20060723