Pesticide for preventing and controlling fungi and bacteria and pesticide for preventing and controlling snail and slug

Abstract

The invention relates to a pesticide for preventing and controlling crop fungi and bacteria diseases, which is prepared from 70 to 85 percent of blue vitriol, 1.2 to 4.0 percent of surfactant and the balance of anhydrous sodium carbonate by weight portion. The invention also relates to a pesticide for preventing and controlling mollusks such as snail, slug and the like, which is prepared from 70.5 to 78 percent of blue vitriol, 0.1 to 0.5 percent of tsumacide or methomyl, 1.2 to 4.0 percent of surfactant and the balance of anhydrous sodium carbonate. The invention relates to a method for producing the two pesticides, which comprises the following steps: thermally drying the blue vitriol by using a roller dryer at a temperature of between 100 and 150 DEG C, and stopping thermal drying when the blue vitriol loses 13 to 18 percent of combined water through detection; sealing and drying other components indoors, detecting water content less than 3 percent, mechanically crushing the dried blue vitriol, and then sieving the crushed blue vitriol by using a sieve of which aperture is between 2 and 4 millimeters; and putting the components into a mixer according to a formulation proportion, mixing the components and packing the mixture by using a double-layer plastic bag. The pesticides of the invention have the advantages of stable drug effect, good effect of preventing and controlling plant diseases and insect pests, and long shelf life.

Description

technical field [0001] The invention relates to a pesticide for preventing and treating fungal and bacterial diseases of crops and a preparation method thereof. [0002] The invention also relates to a pesticide for controlling mollusks such as snails and slugs and a preparation method thereof. Background technique [0003] At present, most of the pesticides used to prevent and control crop fungi and bacterial diseases in China such as cucumber downy mildew, broad bean red spot, and citrus canker are made into wettable powders for use. The production method is to use the original drug, carrier, filler, surfactant, The auxiliary preparations are fully mixed and pulverized very finely. Most of them are organic fungicides, which have a single site of action on diseases, are prone to develop drug resistance, and have a short drug effect period. At present, most of the inorganic anti-disease preparations are made of reacted original drugs such as basic copper sulfate and basic c...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the pesticides used to prevent and control crop fungi and bacterial diseases in China such as cucumber downy mildew, broad bean red spot, and citrus canker are made into wettable powders for use. The production method is to use the original drug, carrier, filler, surfactant, Auxiliary preparations are fully mixed and pulverized very finely, most of them are organic fungicides, which have a single site of action on diseases, are prone to drug resistance, and have a short drug effect period

At present, most of the inorganic anti-disease preparations are made of reacted original drugs such as basic copper sulfate and basic copper carbonate plus related additives, and then ultrafinely pulverized or airflow pulverized into very fine powder, with a fineness of 5 to 30 microns. Disease prevention effect is low

And the commonly used 25% carbendazim wettable powder or Bordeaux mixture for the prevention and treatment of the above diseases is usually prepared into 200 times liquid for prevention and treatment, the control effect is not ideal, and the dosage is large

[0004] At present, the domestic pesticides used to prevent and control snails are mainly granules, such as 6% carnavir metaldehyde, and 6% Mita granules abroad. The production method is to use the adsorption method to adsorb the active ingredients on the inert substances Usually the grain size of the above-mentioned products is between 0.24 and 0.47 cm, and the method of killing insects is to apply it at the pre-emergence and seedling stage. The efficacy period is short, the dosage is large, there is no direct protective effect on crops, and it is toxic to beneficial natural enemies and poultry in farmland