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The first feature of avermectin is its high efficiency and ability to kill a variety of pests, including Lepidoptera, Diptera, Homoptera, Coleoptera pests and spider mites, rust mites, or killing a variety of parasitic nematodes. High-efficiency agent; the second feature is different from other pesticides, it is not easy to produce drug resistance; the third feature is safety, because the agent sprayed on the surface of the plant can be quickly decomposed, so it is safer for natural enemies, to the environment Less pollution, even if used in excess of 10 times will not cause plant phytotoxicity.
Disadvantages: First, the speed of killing pests is slow. The pests eat avermectin. The first is slow action, no feeding, only 2 to 4 days later. Farmers often think that the drug is not effective. Second, the drug is too toxic. All kinds of medicines reduce the toxicity level of the medicine with a low effective ingredient content, but it is still necessary to pay attention to safety during use.
Although avermectin is a good medicine, it cannot be abused. At present, it is still relatively expensive. It is generally used in the vegetable field to control Plutella xylostella, Pieris rapae, leaf miner, Noctuidae, and spider mites. In the fruit trees, various cockroaches, rust tick, hibiscus, whitefly and aphids are controlled. Lepidopteran pests, as well as pests on other crops that are difficult to control with other agents or that have developed resistance and resistance to common agents, such as cotton leafhoppers and cotton bollworms. It is a kind of protection if you can use other medicines as much as possible.
In recent years, a series of mixed insecticides containing avermectin have been developed, such as mixed with various pyrethroids, mixed with chlorpyrifos, etc., which can often accelerate the death rate of pests; increase contact or other modes of action; delay pests The effect of producing resistance is worth applying.
In addition, from the development of the variety, a similar agent called emamectin benzoate, another similar substance called carbamazepine has been tested and confirmed to be more insecticidal than avermectin. High, low toxicity to humans and animals, and has a good application prospect.
Senior Consultant of Sinofert, Professor Xiao Yueyan, Professor, College of Agriculture and Biotechnology, China Agricultural University
Source: Sannong Online
Characteristics and use of avermectin
Avermectin is a microbial fermentation product called Streptomyces fabri or Streptomyces griseus. Because there are no living microorganisms in it, it is not a microbial source of pesticides. It contains a variety of insecticidal ingredients, of which B1a is the most potent and uses it to calculate the effective amount of the agent.
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