Fungicide for preventing and treating powdery mildew of astragali and preparing method of fungicide
A technology of powdery mildew and Astragalus membranaceus, which is applied in the field of fungicides and preparations for the prevention and treatment of Astragalus powdery mildew, can solve the problems of decreased control efficiency, increased control cost, and drug resistance of bacteria, and achieves reduction in usage, reduction of pesticide residues, good control effect
Inactive Publication Date: 2016-07-20
陈淑琴
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Problems solved by technology
[0005] However, in the actual agricultural production process, due to long-term single and large-scale use, it is easy to make the bacteria resistant to pesticides, so the control effect decreases and the cost of control increases.
Method used
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Embodiment 1
[0020] Difenoconazole-prochloraz aqueous emulsion is prepared, and the distribution ratio of each component is calculated by weight:
[0021]
[0022]
[0023] Dissolve difenoconazole and prochloraz in xylene, add alkylphenol polyoxyethylene ether, styrylphenoloxyethylene ether, ethylene glycol and silicone oil and stir evenly as the oil phase, add hydroxymethyl cellulose Stir in water evenly as the water phase, then mix the two phases under stirring at 1000-2000r / min, then perform high-speed stirring at 4000r / min and shear for 60min to obtain a water emulsion product.
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The invention aims at providing a fungicide for preventing and treating powdery mildew of astragali.The fungicide is prepared from effective active ingredients including difenoconazole and prochloraz, and further prepared from a cosolvent, an emulsifying agent, an anti-freezing agent, a defoaming agent, a thickening agent and water.The fungicide is characterized in that the weight ratio of difenoconazole to prochloraz is 1:2.The mode of agentia compounding is adopted, the original preparation technology is improved, and the fungicide is used for preventing and treating powdery mildew of astragali and has the effects of protection, treatment and eradication.The composition can delay the fungicide resistance of germs, the use quantity of the fungicide can be reduced, fungicide resides can be reduced, and pollution to the environment can be relieved.
Description
technical field [0001] The invention belongs to the technical field of agricultural fungicide preparations, and in particular relates to a fungicide for preventing and treating astragalus powdery mildew and a preparation method thereof. Background technique [0002] The pathogen of astragalus powdery mildew is pea powdery mildew (ErysiphePisiDC.), which belongs to Ascomycota subphylum Sclerotinia Erysidiomycetes. It mainly damages leaves, but also stems and pods. Nearly round white powdery spots appear on the leaf surface initially, and after expansion, they are connected into sheets, showing a large white powder area with inconspicuous edges, covered with a white powdery mold layer, and in severe cases, the back of the leaf and the whole plant are covered by white powder. In the later period, the powdery mildew is off-white, and countless small black particles are produced in the mold layer, causing the leaves to turn yellow and fall early. up to 100%. The spores of the ...
Claims
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IPC IPC(8): A01N47/38A01P3/00A01N43/653
Inventor 陈淑琴
Owner 陈淑琴
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