Diamondback moth, cabbage worm, beet armyworm, armyworm, and thrips are common vegetable and field pests that reproduce quickly and cause great harm to crops. Avermectin and emamectin benzoate are generally used for control of these pests, but these agents take a long time to kill insects, and long-term use can easily lead to drug resistance. Today, I would like to introduce a pesticide that can be used in combination with avermectin. It not only kills insects quickly, but also has high efficacy and is not prone to long-term drug resistance. This is "chlorfenapyr".
1. Mechanism of action
Chronic chlorfenapyr is a new type of pyrrole compound that acts on the mitochondria of cells in the body of pests, destroying the energy production process in the cells, thereby causing cell failure and ultimately leading to the death of the pests. Chlorfenapyr kills insects quickly and effectively, but has a narrow insecticide spectrum and a short duration. Avermectin has a broad insecticide spectrum and a long duration. The combination of the two, prevention and treatment, not only has high efficacy, but also a long duration.
2. Main features
(1) Broad insecticide spectrum. It has significant effects on various pests such as diamondback moth, beet armyworm, armyworm, cabbage worm, leafminer, psyllid, whitefly, thrips, red spider, etc. in various vegetables, fields, fruit trees and other crops. It has a certain killing effect on toon and flea beetles.
(2) Good rapid effect. Chlorfenapyr has good permeability and systemic conductivity. When combined with avermectin, it can kill pests within 1 hour after application, and the peak of dead insects is reached in 24 hours. The control efficiency on the same day can reach 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 lasting effect is relatively long. After 15 days of application, the efficacy can still be maintained at about 80%.
(4) It is not easy to develop drug resistance. Avermectin and chlorfenapyr have different insecticidal mechanisms. When the two are mixed, it is not easy to develop drug resistance.
3. Applicable crops
Mainly vegetables such as peppers, tomatoes, cabbage, leafy vegetables, field crops such as wheat and corn, and fruit crops such as lychees.
4. Control targets
Various vegetable pests such as diamondback moth, cabbage worm, beet armyworm, armyworm, cabbage borer, cabbage aphid, leafminer, thrips, etc.
5. Use technology
After mixing avermectin and chlorfenapyr, the effect is significantly enhanced, and it has a good control effect on highly resistant thrips, cabbage worms, beet armyworms, leek maggots, leaf rollers, borers (striped stem borers, yellow stem borers), and armyworms.
Best time to use the drug: Use it in the middle and late stages of crop growth when the temperature is low during the day, and the effect is better. (When the temperature is below 22 degrees, the insecticidal activity of avermectin is higher).
Precautions
(1) Watermelon, zucchini, bitter melon, melon, cantaloupe, winter melon, pumpkin, hanging melon, loofah and other crops are sensitive to chlorfenapyr and are prone to phytotoxicity after use; cruciferous crops (cabbage, radish, rapeseed and other crops) are prone to phytotoxicity if used before 10 leaves, so do not use.
(2) Do not use the drug during high temperature, flowering period or seedling stage, as it is also prone to phytotoxicity. When chlorfenapyr causes phytotoxicity, it is generally acute (symptoms of phytotoxicity will appear within 24 hours after spraying). If phytotoxicity occurs, use brassinolide + amino acid foliar fertilizer in time to alleviate it.
