What medicine can kill the black caterpillar?

The simple way to kill caterpillars is insecticide.

Spraying on plants every 5-7 days. Continuous spraying for about 3 times can completely eliminate caterpillars, and the effect is very obvious. DDVP can also be sprayed in summer, which can play a preventive role.

Insecticide refers to an agent that kills pests, such as beetles, flies, grubs, rhinoceroses, jumping insects and nearly ten thousand other pests. The use of pesticides has gone through several stages: natural pesticides and inorganic compounds were first discovered, but their effects were single, their dosage was large and their duration was short;

Organic synthetic pesticides such as organochlorine, organophosphorus and carbamate have the characteristics of high efficiency, high residue or low residue, and many of them have high acute toxicity to mammals.

Extended data can be divided into:

(1) nerve agent. It acts on the nervous system of pests, such as DDT, parathion, carbofuran and pyrethrins.

(2) Respiratory poisoning. Respiratory enzymes that inhibit pests, such as cyanohydrogen acid.

③ Physical poisoning. For example, mineral oil can block the valve of pests, and inert powder can grind the epidermis of pests and kill pests.

④ Specific pesticides. It causes abnormal physiological reactions of pests, such as repellent to keep pests away from crops, inducer to lure pests with sex or bait, antifeedant to inhibit their taste and stop eating, sterile agent to make one male and one female sterile or both male and female sterile, and insect growth regulator to affect the growth, metamorphosis and reproduction of pests.

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