Avermectin has gastric toxicity and contact effect on mites and insects. The mechanism is different from the general insecticide is to interfere with neurophysiological activities, stimulate the release of γ -aminobutyric acid, and aminobutyric acid on the arthropod nerve conduction inhibition. Adult mites, nymphs and insect larvae show paralysis after contact with avermectin, do not move or feed, and die in 2 ~ 4 days. The lethal effect of abamectin is slow because it does not cause rapid dehydration of insects. Although abamectin can directly kill predatory insects and parasitic natural enemies, it has little damage to beneficial insects due to the small amount of residue on plant surface. Abamectin is adsorbed by soil in the soil and will not move, and is decomposed by microorganisms, so it has no cumulative effect in the environment and can be used as an integral part of comprehensive control. It is easy to prepare and can be used by pouring the preparation into water and stirring a little. It is also safer for crops.
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