An insecticide for agricultural crops, when used at the beginning, has a good insecticidal effect, but as the usage increases and the scope of use continues to expand, cases of increased drug resistance continue to emerge. So, what can we do to increase the effectiveness of pesticides?
Timely medication: Insect pests are generally divided into adult, egg, pupa, and larvae at four stages. Eggs, pupa, and mature larvae are highly resistant. Therefore, we must pay close attention to the larvae before the third instar and nymph stage, when the drug resistance is weak, it will help improve the efficacy.
Moderate medication: First, the amount of medication should not be too much nor too little; Second, the concentration of the liquid can not be too high or too low. Too high can cause poisoning to humans and animals, cause phytotoxicity to crops, and have a low insecticidal effect.
Symptomatic use of drugs: Some pesticides, although with stomach poisoning, internal absorption, fumigation and other functions, can prevent and control a variety of pests, but for different pests, there are still differences in the efficacy of drug speed, high and low, so to symptomatic medication.
Do not spray at high temperature at noon: At this moment, pests will hide and inactive, the liquid will soon dry up, the insecticidal effect will be poor, and it will cause human and animal poisoning and phytotoxicity. Let potions flow down the stalks to the lower parts and pests, increasing insecticidal effectiveness. In addition, pay attention to rotating medications to prevent insects from developing resistance.
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