What are the main killings of avermectin?

Avermectin is a relatively broad-spectrum pesticide. Since the withdrawal of methamidophos pesticides, avermectin has become the mainstream pesticide in the market. Abamectin has been favored by growers because of its excellent cost performance. Abamectin is not only an insecticide , but also an acaricide or a nematicidal agent.

The mode of action and characteristics of avermectin:

Touch, stomach poison, strong penetration. It is a macrolide disaccharide compound. It is a natural product isolated from soil microorganisms. It has a contact and stomach toxicity effect on insects and acarids, and has a weak fumigation effect, and has no systemic action.

However, it has a strong osmotic effect on the leaves, which can kill the pests under the epidermis and has a long residual effect. It does not kill eggs. Its mechanism of action differs from that of general insecticides in that it interferes with neurophysiological activities and stimulates the release of r-aminobutyric acid, while r-aminobutyric acid inhibits the nerve conduction of arthropods, such as mites, mites and insects. The larvae appear paralyzed after contact with the agent, inactive and do not feed, and die after 2 to 4 days.

It does not cause rapid dehydration of insects, so its lethal effect is slower. However, although there is a direct killing effect on predatory and parasitic natural enemies, the damage to beneficial insects is small due to the small residual surface of the plants. It has obvious effects on root-knot nematodes.

Excellent for lepidopteran pests

Abamectin is registered on the Lepidoptera pest Plutella xylostella, and occasionally it is also registered on the rice leafroller. At present, avermectin is mainly used to wind the leafhopper on rice, due to the use time. Long, the general avermectin will also be compounded with tetrachlorfenamide, chlorantraniliprole, etc. to control the leafhopper.

In the past few years, the rice market has appeared to use high-dose avermectin to fight resistant bismuth. In the case of compounding other medicinal agents, the effect is not bad. Abamectin is used less on the vegetable diamondback moth. Mainly because the resistance is too great.

Good control of mites

Avermectin has good effects on citrus red spiders and other fruit tree red spiders, etc. It is often compounded with snail ester and carbazole to control cockroach pests. Abamectin has strong penetrating power and is effective in controlling cockroaches. There is still a certain market in the class.

Can be used to kill root knot nematodes

The effect of avermectin on the control of soil root-knot nematodes is also good. It is usually in the form of granules. Some registration certificates are compounded with avermectin and thiazolidine. At present, the root knot nematode market is large, and the market prospect of avermectin is still good.

Conclusion

As a relatively conventional agent, avermectin has also developed resistance, so we generally do not recommend the use of avermectin alone to control pests. It is generally used in combination with other agents. It is recommended that everyone use avermectin. Attention time, pay attention to rotation medication to delay the emergence of resistance.

(This article first appeared in the headlines today, Author: Huang Tai Zi)

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