Avermectin, which mainly has stomach toxicity and contact killing effects on mites and insects, has a low risk of harm, is easy to mix and dispense, and is widely used as an indispensable insecticide and acaricide, known as the "divine medicine".
Farmers love it very much, it not only has good results, but also has a high cost-effectiveness.
Avermectin has a contact killing effect on fruit trees, vegetables, insects, and mites, killing many insects, but not eggs.
After contact with the aforementioned insects, the insects will experience paralysis symptoms, become inactive, do not eat, and die after 2-4 days.
Why do farmers feel that the effectiveness of abamectin is not as good as before?
How does resistance form? Due to market and field abuse!
1. Low dose → Poor effect → Increased dose → Formation of resistance
2. Due to the continuous increase in dosage in the field market, the resistance of insect mites has been increasing year by year, and after many years and generations of inheritance, the current resistance has been caused.
The common concentrations of Avermectin emulsifiable concentrates are 0.5%, 0.6%, 1%, 1.8%, 2%, 2.8%, 5%, and 10%, with concentrations of 1.8% and 5% being the most common.
Due to its unique mechanism of action and lack of interaction resistance with other drugs, it is still widely used for compounding and mixing with other compounds to significantly improve its efficacy. Currently, it still sits on the throne of "divine medicine".
When it comes to compounding and mixing with other medications, we can't help but think of what proportion to use. This should mention which insects are mainly killed, after all, the dosage varies among different insects.
What types of insects do avermectins mainly kill?
1. Good effect on lepidoptera pests!
Usage: Use 1000 to 1500 times 2% avermectin emulsifiable concentrate+1000 times 1% carbaryl salt emulsifiable concentrate.
Avermectin is commonly registered on the Lepidoptera pest diamondback moth, and occasionally on the rice leaf roller. Currently, Avermectin is mainly used to kill the rice leaf roller.
Due to its long usage time, avermectin is usually combined with tetrachlorofenamide, chlorfenamide, etc. to control the leaf roller.
In recent years, the rice market has seen the use of high-dose avermectin to combat resistant rice borers. When combined with other pesticides, the effect is still good. Abamectin is less used on vegetable diamondback moths, mainly due to its high resistance.
2. It works well to prevent and control mites
Avermectin has good effects on citrus red spiders, other fruit tree red spiders, and other mites. It is often combined with spiramycin, imidazole, and other compounds to control mite pests. Avermectin has strong penetration ability and still has a certain market in the prevention and control of mites.