WO2016084048A1 - Composición pesticida de microorganismos entomopatógenos - Google Patents
Composición pesticida de microorganismos entomopatógenos Download PDFInfo
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- WO2016084048A1 WO2016084048A1 PCT/IB2015/059185 IB2015059185W WO2016084048A1 WO 2016084048 A1 WO2016084048 A1 WO 2016084048A1 IB 2015059185 W IB2015059185 W IB 2015059185W WO 2016084048 A1 WO2016084048 A1 WO 2016084048A1
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- composition according
- spp
- pesticidal composition
- conidia
- entomopathogenic
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION 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
- A01N63/00—Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
- A01N63/30—Microbial fungi; Substances produced thereby or obtained therefrom
Definitions
- the present invention relates to compositions for the biological control of pests comprising an effective amount of an entomopathogenic microorganism, adjuvants and an acceptable vehicle.
- the pesticidal compositions of the invention have high stability and efficacy against pests and insects in various crops.
- the whitefly Bemisia tabaci (Gennadius, 1889) (Hemiptera: Aleyrodidae) is an important pest insect in different crops around the world, especially in the tropics and subtropics (1). Its ability to adapt and ability to colonize new hosts has facilitated its establishment and its permanent survival (2).
- the most relevant damage caused by the whitefly is the transmission of diseases caused by viruses, especially by geminiviruses or begomoviruses (Geminiviridae) (2,3).
- the economic losses caused by this insect as a direct pest or as a vector reach the millions of dollars every year (2,4). Crops such as tomatoes, cotton, eggplant and beans are very affected by this pest.
- Entomopathogenic fungi have very special characteristics that allow them to survive parasitically on insects and saprophytic on decomposing plant material. Saprophyte growth can result in the production of conidiophores, conidia and mycelial development, which allows the fungus to be produced in the laboratory using appropriate techniques.
- bioinsecticides can be produced from different genera and species of entomopathogenic fungi whose active ingredient is the fungus itself. Examples of these products of proven effectiveness are the NoFly® bioinsecticides based on Paecilomyces fumosoroseus and Mycotal® based on Lecanicillium lecanii for whitefly control. Other commercial products such as Mycotrol ES®, Naturalis L®, BotaniGard®, Conidia® and Tracer® are also widely known.
- the present invention relates to pesticidal compositions comprising an effective amount of an entomopathogenic microorganism, adjuvants and an acceptable vehicle, which has high stability and exhibits adequate efficacy against pests and insects, including whitefly.
- the invention also contemplates the use of said compositions for the phytosanitary control of pests and disease vectors in various crops. Unexpectedly, the compositions of the invention exhibited good stability associated with a broad insecticidal spectrum.
- FIG. 1 Germination of L. lecanii conidia formulated VIO 26 as a dispersible granulate (WG) and stored for six months at 8 ° C, 18 ° C and 28 ° C. Treatments with the same letter do not show significant differences according to Tukey's test (95%).
- FIG 2. Efficacy of the conidia of L. lecanii V1026 formulated as a dispersible granulate (WG) and stored for six months at 8 ° C, 18 ° C and 28 ° C. Treatments with the same letter do not show significant differences according to Tukey's test (95%).
- FIG 3. Effect of simulated solar radiation on the germination of formulated and unformed Lecanicillium lecanii V1026 conidia. Treatments with the same letter do not show significant differences according to Tukey's test (95%).
- compositions of the present invention comprise, as active ingredient, at least one entomopathogenic microorganism. Additionally, the compositions of the invention include formulation aids or auxiliaries and an acceptable vehicle that allows them to be stable in the long term and applied to various crops.
- insects and insects includes insects recognized by those skilled in the art such as whiteflies, aphids, thrips, mites, mealybugs, psnids, weevils, plant bugs, borers, foliage-eating insects, foliage-eating beetles on all types of plants, ticks and mosquito vectors and / or disease transmitters.
- effective amount means an amount and / or concentration of an entomopathogenic microorganism and / or combinations thereof, sufficient to exhibit appropriate effectiveness and efficacy on the target pest (s).
- Entomopathogenic microorganisms present in the compositions of the invention include, but are not limited to Lecanicillium spp, Beauveria spp, Metarhizium spp, Paecilomyces spp, Nomouraea spp. and Entomophthora spp.
- the entomopathogenic microorganism is in the form of conidia.
- Conidia are asexual spores characteristic of many fungi that are relatively temperature tolerant, stable in different environmental conditions and that can be quantified and serve as units of measurement of the fungus to evaluate parameters such as concentration and viability.
- the entomopathogenic microorganism is a fungus of the genus Lecanicillium spp, more preferably a strain of Lecanicillium lecanii and even more preferably Lecanicillium lecanü V1026, either alone or in combination with other entomopathogenic microorganisms.
- the pesticidal compositions of the invention comprise between 1x105 and 1x1012 conidia / g of entomopathogenic microorganism (s) as active ingredient, adjuvants and an acceptable vehicle.
- concentration of active ingredient in the pesticidal compositions of the invention is between 7 and lxlO lxlO 10 conidia / g, preferably 5 x10 9 conidia / g.
- the compositions of the invention include different adjuvants with specific functions to shape, improve stability and increase shelf life.
- the "acceptable vehicle" for purposes of the present invention can be defined as a substance or mixture of substances (eg solutions, emulsions and suspensions) capable of dissolving or dispersing the active ingredient, without affecting its ability to perform the desired function.
- adjuvants there may be mentioned, for example, water, organic solvents, oils, alcohols, polyols, support substances (eg kaolins, talcum), diluents, drying protectors, physical screen, sunscreens, emulsifying agents, viscous agents, surfactants, stabilizers and dyes.
- support substances eg kaolins, talcum
- sunscreens emulsifying agents, viscous agents, surfactants, stabilizers and dyes.
- the drying protector and the diluent are harmless substances for the microorganism that protect the cells during the dehydration process, improving their tolerance to abiotic stress conditions that are generated during storage.
- Sunscreens work by means of blocking and filtration mechanisms of ultraviolet radiation, increasing the photostability of the active ingredient against solar radiation.
- the disintegrating and viscous agents allow to guarantee a homogeneous concentration of the active agent in the volume of reconstitution.
- the compositions of the invention may be in the form of powders, soluble granules, dispersible granules, dispersible tablets, emulsion or suspension.
- soluble granulate is intended to include granules for application after dissolution of the active ingredient in water as a solution, however, may contain insoluble formulation auxiliaries.
- the term “dispersible granulate” refers to granules for application in suspension form, after disintegration and dispersion in water or other aqueous solvent.
- the term "dispersible tablet” refers to a formulation in the form of tablets to be used individually to form a suspension of the active ingredient after its disintegration in water.
- emulsion is intended to include a liquid that contains water and oil, either in OAV or W / O form, to be applied directly or diluted, being able to form a microemulsion or a conventional emulsion.
- suspension refers to liquids containing the active agent and / or adjuvant (s) stably suspended, to be applied directly or diluted in water.
- compositions of the invention are in the form of dispersible granules, have as active ingredient conidia of the entomopathogenic microorganism and the adjuvants include sunscreens that improve the persistence of the product. Additionally the compositions include a drying protector and stabilizing substances that improve the stability of the active ingredient during the storage process.
- Entomopathogenic microorganisms of the compositions of the invention can be obtained by culturing an inoculum thereof in a suitable culture medium and incubating it in suitable environmental conditions until obtaining the desired amount of biomass.
- the adjuvants and the vehicle can be mixed in a container under aseptic conditions and then added to the suspended conidia while maintaining constant agitation until a homogeneous mixture is obtained.
- the obtained mixture can be granulated and dried to obtain granules, or it can be adapted to a suspension or emulsion.
- the compositions are in the form of dispersible granules.
- the biomass is mixed with a diluent, a viscosifying agent, a disintegrant, sunscreens and a protein solution used as a drying protective agent and a dye.
- concentration ranges are shown in Table 1.
- the pesticidal compositions of the invention have insecticidal action, are effective against pests and insects and can be stored and transported through commercial distribution channels without the need for special handling. Additionally, the compositions of the invention have no notable adverse effects on the environment and non-target species, including humans.
- a further embodiment of the present invention relates to the use of the compositions of the invention for the control of pests and insects in various crops.
- the compositions can be applied in the target areas in any way known to those skilled in the art.
- the present invention will be presented in detail through the following examples, which are provided for illustrative purposes only and not for the purpose of limiting the scope of the present invention.
- Example 1 Obtaining the strain and conidia of Lecanicillium lecanii V1026.
- Lecanicillium lecanii V1026 isolated in 1996 from adults of Trialeurodes vaporariorum collected in the Sumapaz region, department of Cundinamarca, Colombia e was supplied by the Germplasm Bank of Microorganisms with Interest in Biological Control of CORPOICA.
- the Lecanicillium lecanii V1026 strain was reactivated in Malt Extract Agar medium (EM Agar) and incubated 25 ° C for 8 days. The mass production of the microorganism was carried out using a previously standardized cereal-based substrate (8).
- Example 2 Preparation of pesticidal compositions in the form of dispersible granules
- An insecticidal composition in the form of dispersible granules was prepared with Lecanicillium lecanii V1026 as active ingredient.
- the microorganism was obtained according to Exemplol. Kaolin, bentonite, skim milk powder and explocel® were incorporated into a planetary mixer, and mixed for approximately 5 minutes on the first level of the intensifier. The previous mixture was mixed with the moist conidia of Lecanicillium lecanii V1026 for approximately 15 minutes using the mixer on the second level of the intensifier, during this time the sunscreens were added. Table 2 shows the concentrations of each component.
- the wet mixture was fed slowly to a functioning oscillating granulator with an 8mm perforated mesh.
- the wet granulate was recovered in trays and subjected to drying at a temperature of 24 ° C for approximately 24 hours until the granulate was obtained with a final humidity between 4% and 7%.
- Table 2
- the concentration, germination percentage and humidity were determined to verify its quality.
- 1 gram of the product was added to 9 mL of 0.1% Tween 80® and decimal dilutions were made up to 10-. From this dilution the count of conidia was carried out using a Neubauer chamber. With the count obtained and the dilution used, the concentration of the product expressed as conidia per gram of product (conidia / g) was calculated.
- Example 2 1.0 gram samples of a dispersible granulate obtained according to Example 2, were packed in vacuum sealed metallic bags (4cm x 6cm), which were stored for six months in digital incubators set at 8 ⁇ 2 ° C, 18 ⁇ 2 ° C and 28 ⁇ 2 ° C. Before starting storage and every two months for six months the germination capacity of the conidia was determined. Additionally, biocontroller activity was evaluated under laboratory conditions before storage and every three months during the six months of the study.
- the stability study had a completely randomized experimental design, with repeated measurements over time and all measurements were performed in triplicate. The results of the stability study were subjected to an analysis of variance and then to comparisons of means using the Tukey test (95%).
- the design of the experiment was completely randomized with three repetitions and there was an absolute witness.
- the experimental unit corresponded to a bean plant with a trifolium formed and the sampling unit corresponded to a leaflet previously infested with the whitefly and applied with the treatment.
- the product did not show a significant decrease in germination when it was stored at 8 ° C for six months.
- the initial germination percentage was 98.8%, which decreased to 93.3% after six months of storage at that temperature (FIG 1).
- the product remained stable during the first four months of storage with germination higher than 83.5%, while at the sixth month, the germination capacity of the conidia was 71.8%.
- the germination percentage increased to values greater than 80%, suggesting that storage may not cause conidial death but rather induce a state latency, which delayed its metabolic activation and therefore the germination of conidia.
- the product initially showed an efficiency of 89.6%, which decreased after six months of storage at 8 ° C to 80.1% (FIG 2).
- the effectiveness of the product showed a progressive decrease over time when stored at 18 ° C.
- composition A the dried conidia of Lecanicülium lecanii V1026 without adjuvants
- composition B a WG composition obtained according to Example 2 reconstituted in water
- composition C the same composition WG, but suspended in an oily base and reconstituted in water
- All suspensions were adjusted to a concentration of lxlO 6 conidia / mL.
- 0.1 mL samples of each treatment were seeded in agar-EM-benlate medium (0.003%).
- Three boxes were inoculated per exposure time (0, 30, 60 and 90 min) for a total of 12 boxes for each treatment.
- the experimental design was completely randomized with repeated measurements over time and three repetitions for each treatment and exposure time.
- the inoculated boxes were exposed to the radiation emitted by a 16S 150 solar simulator Solar Light brand adjusting the power of UV-B radiation to 12 ⁇ / cm .nm, with a radiometer.
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- General Health & Medical Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Pest Control & Pesticides (AREA)
- Biotechnology (AREA)
- Agronomy & Crop Science (AREA)
- Plant Pathology (AREA)
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Abstract
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BR112017008990-4A BR112017008990B1 (pt) | 2014-11-28 | 2015-11-27 | Composição pesticida de microrganismos entomopatogênicos |
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CO14-262576 | 2014-11-28 | ||
CO14262576A CO7290160A1 (es) | 2014-11-28 | 2014-11-28 | Composiciones plaguicidas |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2019116232A1 (es) * | 2017-12-11 | 2019-06-20 | Corporación Colombiana De Investigación Agropecuaria-Agrosavia | Composiciones sólidas que comprenden microorganismos con actividad biocida. |
Citations (5)
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US5730973A (en) * | 1994-02-15 | 1998-03-24 | Hoechst Schering Agrevo Gmbh | Water-dispersible granules of spores or live Beauveria bassiana |
WO2009093257A2 (en) * | 2008-01-24 | 2009-07-30 | Satyasayee Divi | Formulation of entomopathogenic fungus for use as a biopesticide |
CN101658186A (zh) * | 2009-09-16 | 2010-03-03 | 甘肃省科学院生物研究所 | 蜡蚧轮枝菌速释分散片及其制备方法 |
WO2010044680A1 (en) * | 2008-10-14 | 2010-04-22 | Millennium Microbes Limited | Entomopathogenic fungi and uses thereof |
CN102687731B (zh) * | 2012-06-20 | 2013-11-13 | 东北林业大学 | 苏云金杆菌和白僵菌可湿性粉剂 |
-
2014
- 2014-11-28 CO CO14262576A patent/CO7290160A1/es unknown
-
2015
- 2015-11-27 BR BR112017008990-4A patent/BR112017008990B1/pt active IP Right Grant
- 2015-11-27 WO PCT/IB2015/059185 patent/WO2016084048A1/es active Application Filing
Patent Citations (5)
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US5730973A (en) * | 1994-02-15 | 1998-03-24 | Hoechst Schering Agrevo Gmbh | Water-dispersible granules of spores or live Beauveria bassiana |
WO2009093257A2 (en) * | 2008-01-24 | 2009-07-30 | Satyasayee Divi | Formulation of entomopathogenic fungus for use as a biopesticide |
WO2010044680A1 (en) * | 2008-10-14 | 2010-04-22 | Millennium Microbes Limited | Entomopathogenic fungi and uses thereof |
CN101658186A (zh) * | 2009-09-16 | 2010-03-03 | 甘肃省科学院生物研究所 | 蜡蚧轮枝菌速释分散片及其制备方法 |
CN102687731B (zh) * | 2012-06-20 | 2013-11-13 | 东北林业大学 | 苏云金杆菌和白僵菌可湿性粉剂 |
Non-Patent Citations (6)
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ASANO, S.: "Ultraviolet protection of a granulovirus product using iron oxide.", APPL. ENTOMOL. ZOOL., vol. 40, no. 2, 2005, pages 359 - 364 * |
COHEN, E. ET AL.: "Photostabilization of Beauveria bassiana conidia using anionic dyes", APPLIED CLAY SCIENCE ., vol. 42, no. 3 -4, January 2009 (2009-01-01), pages 569 - 574, ISSN: 0169-1317 * |
COTES, A. M. ET AL.: "Biocontrol of whiteflies based on Lecanicillium lecanii.", IOBC/WPRS BULLETIN, vol. 45, June 2009 (2009-06-01), pages 263 - 266, Retrieved from the Internet <URL:http://www.iobc-wprs.org/pub/bulletins/bulletin2009-45-table-of-contents_abstracts.pdf> [retrieved on 20160315] * |
LOONG, C. Y. ET AL.: "Effects of UV-B and Solar Radiation on the Efficacy of Isaria fumosorosea and Metarhizum anisoplae (Deuteromycetes: Hyphomycetes) for Controlling Bagworm, Pteroma pendula (Lepideoptera: Psychidae).", JOURNAL OF ENTOMOLOGY, vol. 10, no. 2, 2013, pages 53 - 65 * |
SANTOS, A. M. ET AL.: "Compatibilidad in vitro de un bioplaguicida a base de Lecanicillium lecanii (Hypocreales: Clavicipitaceae) con agroquímicos empleados en los cultivos de algodón y berenjena.", REVISTA COLOMBIANA DE BIOTECNOLOGIA, [S.I., vol. 15, no. 2, December 2013 (2013-12-01), pages 132 - 142, ISSN: 1909-8758 * |
SHINDE, S. V.: "Lecanicillium lecanii (Zimm.) Zare and Games'' an important Biocontrol agent for the management of Insect pests - a review.", AGRI. REVIEW, vol. 31, no. 4, 2010, pages 235 - 252, ISSN: 0976-0741 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2019116232A1 (es) * | 2017-12-11 | 2019-06-20 | Corporación Colombiana De Investigación Agropecuaria-Agrosavia | Composiciones sólidas que comprenden microorganismos con actividad biocida. |
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CO7290160A1 (es) | 2015-06-10 |
BR112017008990A2 (pt) | 2018-04-10 |
BR112017008990B1 (pt) | 2022-08-16 |
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