The winter weather is relatively cold, and many pests and diseases are in the “hibernation periodâ€. At this time, it is the best time for the best pest control work. Prevention of pests and diseases, pesticides are the best choice. Rational use of pesticides can achieve twice the result with half the effort. What should you pay attention to? The use of pesticides in the cold season is subject to the “432†rule.
Four tips for improving the use of pesticides in winter
1. The application time is selected in the sunny high temperature period. During the high temperature in winter, the feeding rate and respiratory intensity of the pests are greater than usual. At this time, the medicine can bring the liquid into the pests, which is beneficial to the poisoning effect.
2, the appropriate amount of increased dose can enhance the effect of poisoning. It can be quantified according to the temperature of the temperature, but it can not exceed 50% of the conventional dosage, and water should be added strictly according to the dilution factor, and cannot be changed at will.
3. Select pesticides suitable for use in winter. Stomach poisons and contact agents such as deltamethrin, phoxim, stone sulphur mixture, etc., are less affected by temperature and can exert better insecticidal effects; while systemic and fumigants such as enemy killing, dichlorvos, etc. Pesticide, low temperature will obviously affect its insecticidal effect, so it is necessary to confirm when selecting pesticides.
4. Give priority to the use of soil pesticides. In winter, the general crops are in a dormant period and have strong drug resistance. Therefore, pesticides such as Bordeaux mixture and stone sulfur mixture can be used to control pests, which is economical and effective.
Use pesticides to avoid "3 dangerous beaches"
Myth 1: The higher the content, the better. When farmers choose pesticides, they tend to think that the higher the content, the better, but in actual use, to achieve the same effect, the absolute amount of active ingredients should be increased. Mainly because there is no low cost of various additives, although the price is cheap, but the effect is not worth the candle and should not be promoted.
Myth 2: The faster the drug, the better. Any pesticide has its mechanism of action. However, in order to pursue rapid drug efficacy, many products have added hidden components to highlight the effects of the products, especially the safety and environmental risks brought by the addition of prohibited pesticides.
Misunderstanding 3: Change the dosage at will. Excessive, excessive and excessive frequency of pesticides will bring many problems, which will cause waste, increase the resistance of pests and diseases to pesticides, and easily lead to excessive pesticide residues. Therefore, the dosage can not be changed arbitrarily, and it should be strictly used according to the dosage on the pesticide instruction manual.
Two classifications of pesticides
Structurally, it can be divided into inorganic pesticides and organic pesticides: the former refers to pesticides made from mineral raw materials; the latter includes organic chlorine, organic phosphorus, carbamates, pyrethroids, silkworm toxins and specific insecticides. Chemically synthesized pesticides, as well as mineral oil emulsions, plant pesticides, and microbial pesticides, which are made from natural raw materials and their metabolites.
According to the control object, it can be divided into: 1. Acaricide, an agent specially used for controlling mites without insecticidal or bactericidal effects, such as scorpion and dicofol. 2, fungicides, special agents for disease prevention without other control effects, such as methyl thiophanate, toxic mycelium and so on. 3, herbicides, special agents for controlling weeds without other effects, such as butachlor, gram without trace. 4. Plant growth regulators, agents for promoting or inhibiting plant growth and maintaining flowers and fruits, such as ethephon and paclobutrazol.
More pesticide knowledge, please pay attention to China Pesticide Network
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