Diamondback moth, cabbage caterpillar, Spodoptera exigua, Spodoptera litura and thrips are common vegetable and field pests. They reproduce quickly and cause great harm to crops. For these pests, abamectin and emamectin salt are generally used for control. However, these pesticides take a long time to kill insects and are easy to develop resistance when used for a long time. Today, I would like to introduce to you a pesticide that, when used together with avermectin, not only kills insects quickly, but also has high efficacy and is less likely to cause resistance. This is "chlorfenapyr".
1. Mechanism of action
Chlorfenapyr is a new type of pyrrole compound that acts on the mitochondria of cells in pests, destroying the energy production process in the cells, causing cell failure and ultimately leading to the death of the pest. Chlorfenapyr kills insects quickly and effectively, but has a narrow insecticidal spectrum and a short duration of effect. Abamectin has a broad insecticidal spectrum and a long duration of effect. The combination of the two, combined with prevention and treatment, not only has high efficacy, but also has a long duration of effect.
2. Main features
(1) Broad insecticidal spectrum. It has significant effects on pests such as diamondback moth, beet armyworm, Spodoptera litura, cabbage caterpillar, leafminer fly, psyllids, whiteflies, thrips, red spider mites and other pests in various crops such as vegetables, fields and fruit trees. , Flea beetles have a certain killing effect.
(2) Good quick effect. Chlorfenapyr has good permeability and systemic conductivity. Compounded with avermectin, it can kill pests within 1 hour after application, and reaches the peak of dead pests in 24 hours. The control efficiency on the same day reaches more than 95%, and the efficacy is increased by 4 times.
(3) High efficacy and long-lasting effect. When the two are combined, the control effect is about 90% within 1-3 days after application, and the effect lasts for a long time. After 15 days of application, the efficacy can still be maintained at about 80%.
(4) It is not easy to develop drug resistance. Abamectin and chlorfenapyr have different insecticidal mechanisms. Mixing the two will not easily produce resistance.
3. Applicable crops
Mainly include vegetables such as peppers, tomatoes, cabbage, and leafy vegetables, field crops such as wheat and corn, and fruit crops such as lychees.
4. Prevention and control objects
Diamondback moth, cabbage caterpillar, beet armyworm, Spodoptera litura, cabbage borer, cabbage aphid, leafminer, thrips and other vegetable pests.
5. Use technology
Abamectin and chlorfenapyr have obvious synergy after mixing. It has a good control effect on highly resistant thrips, caterpillars, beet armyworm, leek maggots, leaf rollers, borers (borers two and three), and Spodoptera litura.
Best time to use: Use during the middle and late stages of crop growth, when the temperature is low during the day, for better results. (When the temperature is lower than 22 degrees, the insecticidal activity of abamectin is higher).
Precautions
(1) Crops such as watermelon, zucchini, bitter melon, muskmelon, cantaloupe, winter melon, pumpkin, hanging melon, and loofah are sensitive to chlorfenapyr and are prone to phytotoxicity problems after use. Do not use it before 10 leaves of cruciferous crops (cabbage, radish, rapeseed, etc.) because it is prone to phytotoxicity.
(2) Do not use pesticides during high temperature periods, flowering stages, or seedling stages, as this may cause phytotoxicity. When Chlorfenapyr causes phytotoxicity, it is usually acute phytotoxicity (symptoms of phytotoxicity will appear within 24 hours after injection). If phytotoxicity occurs, brassinolide + amino acid foliar fertilizer should be used in time to alleviate it.
