Classifications

• • C—CHEMISTRY; METALLURGY
  • C05—FERTILISERS; MANUFACTURE THEREOF
  • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
  • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
  • C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
• • 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
  • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
  • A01N37/36—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids
• • 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
  • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
  • A01N59/16—Heavy metals; Compounds thereof
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
  • A01P3/00—Fungicides

Definitions

• the present invention generally relates to chemical formulations for benefitting crops, first providing nutrients to crops and second for the control of plant infecting microorganisms.
• metals typically include free ions or various complexes thereof, including chelates.
• WO 2006/135445 A2 the inhibitory effect of zinc chelates on a diverse species of bacteria as well as fungi is disclosed, the scenario in which this activity is observed is within a medical context and or in food preservation context.
• Another aspect of the pesticidal activity associated with various metals is the essential effect of low pH in such a scenario.
• a chemical composition that promotes growth, vigor, and quality in, of agricultural crops
• composition in accordance with the present invention includes a high concentration of two plant nutritive metal anions, zinc (a transition metal) and potassium (a non transition metal), devoid of inorganic anions, forming an aqueous solution at a pH above 7.
• composition in accordance with the present invention when applied to crops typically by spraying onto the plant canopy, but also by irrigating the composition into the root environment.
• composition when applied to plants induced a significant reduction in some important plant diseases, caused at least by oomycetes and ascomycetes.
• Fig. 1 is a diagram describing the process for preparing a composition in accordance with the present invention.
• an aqueous mixture of chelated zinc ions containing also dissolved therein a hefty amount of potassium ion forms a clear solution.
• This solution is made having a basic pH.
• the composition in accordance with the present invention uses water, potassium hydroxide as a source of potassium, zinc oxide as zinc source, and one or more chelating organic acids, typically a combination of citric acid and lactic acid. There are other known chelating organic acid, such as gluconic acid but they were not used. This way a high concentration of solubilized potassium combined with zinc can be obtained.
• a composition without any lactic acid is possible, but tends to be less stable in storage, as precipitation may start after finalizing the formulation, typically between weeks or months after.
• composition without any citric acid can be obtained using enough lactic acid to chelate the zinc.
• the combination of citric acid and lactic acid as acidifiers and chelators allows to provide a stable solution of specific gravity of almost 1 .5.
• the pH is brought to a level above 7, for example 8.
• Such resulting composition (referred to hereinafter as composition A) can be implemented both as a compound fertilizer of zinc and potassium, as well as a pesticide as will be described below.
• Such a composition as will be described in more detail below surprisingly demonstrates an activity as an agent for mitigating some notorious plant pathogens causing diseases.
• composition A is made out of 38.75 g (grams) water, 19.76 g KOH (90%); 9.68 g ZnO; 26.18 g citric acid monohydrate, and lactic acid (88%) 5.63 g.
• KOH the entire amount required
• step 24 KOH is added (the entire amount) cooling may be required.
• step 26 zinc oxide, (the entire amount) is added while stirring.
• step 28 chelating organic acids (one or more) are carefully added while cooling in step 30 mixing and cooling is continued until the solution is clear and transparent.
• pH is adjusted by adding either KOH or acid, conveniently lactic acid. This product contains a high concentration of potassium and zinc in solution.
• the molarity of the acid used should be brought to a level that would compensate for the lack of the additional organic acid.
• the presence of organic acid/s in the compositions in accordance with the invention is necessary to compensate for the high pH provided by the potassium hydroxide used as a source of potassium.
• the chelation of the zinc ions with acids is necessary in order to keep the zinc ions solubilized in the relatively high pH environment of the composition as described above.
• Tomato plants were grown in a test facility of GEP managed by RES AGRARIA in TERAMO, ITALY The plants exhibited infection by Phytophthora infestans.
• the test plants treated (by spraying) using two agents to separate group of plants.
• the agents were Cumeta flow (a product of Diachem, Italy) on the one hand and composition A as described above.
• Cumeta flow is a commercial product containing a combination of metalaxil-m (at 24 grams/litre) and copper as tribasic copper sulfate (at 200 g/litre). Spraying the commercial product on the tomato plants was performed at a rate of 400 ml per 100 litres, and the spraying of composition A was applied at a rate o1 litre or 2 litres per hectare.
• Table 1 some more details of controlled experiments performed in 2022 comparing composition A with the conventional agent (except for the case of hazel nuts in which no conventional agent was used) are reported as compared to conventional pesticides.
• Table 2 some more details of non controlled observations demonstrating pesticidal activity, crops are not specified for each pest. However trials were performed on peppers, tomato, eggplant and cucumber and results as observed were described as acceptable in each case.
• the products in accordance with the present invention can hardly be suspected to contain toxic or environment disrupting components. Even the breakdown products of the organic acids described above which are ubiquitous in the nature, can hardly be suspected as turning into objectionable elements.
• composition of the invention as a foliar fertilizer
• Potassium and zinc are rwo nutritive metals that are wekk known in the art of agriculture, Although a fertilizer for providing only zinc and potassium is not commonly found in the market, the reason for dispensing such elements to crops or plants in general is obvious.
• Composition A described above exemplified an embodiment of a fertilizer containing no anionic nutritive element.
• potassium source is employed as a component of a fertilizer in the form of salt which includes as the anionic part, phosphate, sulfate, chloride, or nitrate.
• no inorganic anion is included, rather, chelating organic acid/s are included in the composition.
• These one or more acids are utilized as ligand/s for complexing (or in other words chelating) the zinc of the fertilizer of the invention.
• zinc oxide is used, thereby obviating mineral anions.
• the raising of the pH of the composition is facilitated by the presence of the ligands which prevent, if well balanced, the precipitation of the zinc.
• the resulting composition in accordance with the present invention utilizes the organic anions as acidifiers, providing a high concentration of potassium and zinc in a stable solution.
• composition of the invention facilitates the utilization of a high concentration of zinc and potassium, and spraying the combination without the extra burden of cationic minerals.

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• Life Sciences & Earth Sciences (AREA)
• Pest Control & Pesticides (AREA)
• Plant Pathology (AREA)
• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Environmental Sciences (AREA)
• Zoology (AREA)
• Wood Science & Technology (AREA)
• General Health & Medical Sciences (AREA)
• Dentistry (AREA)
• Health & Medical Sciences (AREA)
• Agronomy & Crop Science (AREA)
• Inorganic Chemistry (AREA)
• Organic Chemistry (AREA)
• Microbiology (AREA)
• Mycology (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Fertilizers (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

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• 2022
  • 2022-12-18 WO PCT/IB2022/062431 patent/WO2023119101A1/en not_active Ceased
  • 2022-12-18 EP EP22910319.7A patent/EP4451872A4/de active Pending

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