Key points of spraying Pesticide in High temperature Weather

In summer, the temperature is relatively high, so pesticide spraying should be done safely. When spraying pesticide, it is advisable to wear cotton clothes, masks, gloves and other protective articles. The following points must be paid attention to when selecting drugs and applying drugs: the selection of quick-acting pesticides, such as dichlorvos, methomyl, prochloraz, and other pesticides with strong toxic effects, can kill pests within 1 to 2 hours after use.

Choose pesticides with strong internal absorption, such as dimethoate, quick mirex, metalaxyl, etc. 4 to 5 hours after use, more than 80% of the effective ingredients can be absorbed into the internal tissues of crops, even if it rains, pests and germs can still be killed.

The adhesive force of adding adhesive agent, water agent and wettable powder pesticide to water agent and wettable powder pesticide is poor. When preparing pesticide, 100~150 g soybean powder or washing powder is added to every 100 kg liquid medicine as adhesive agent, which can improve the application effect of pesticide.

Avoid spraying pesticides in rainy days and under the scorching sun. It is better to spray pesticides after 8~10 a.m. and 5 p.m. When the wind is large, it should stop spraying, otherwise it will cause uneven spraying and easy to cause phytotoxicity.

According to the toxicity of pesticides, the safety interval of spraying is determined. The residual period of general highly toxic pesticides is more than 1 month, and the residual period of highly effective and low toxic pesticides is 7~10 days. No matter grain, oilseed, melon crops and fruit trees, they should stop using drugs according to specifications before harvest to prevent human and animal poisoning. (Zhu Guangkai)