Spraying part When cotton bollworms lay eggs, they are usually produced on the top of cotton plants, on the young leaves of the top of the fruit branches, on the buds and on the leaves. The focus should be sprayed on the top of the cotton plant and on the tender tips, buds and stalks of the fruit branches. Spray time The hatching pattern of cotton bollworm is that the egg head is white, two days yellow, three days black, and hatching in four days. The second day after hatching, the growth point was harmed, and on the fourth day, the young bud was damaged. Most of the cotton bollworms are active in the morning from 8 to 11 am and after 4 pm, and there is very little activity during the high temperature period. The appropriate period of prevention and treatment should be applied after 8 to 11 am and 4 pm after the peak of hatching until most of the eggs become black or hatched. Avoid high temperature application, high temperature application is easy to decompose, not only the operator is easy to poison, but also poor efficacy. Alternate medication Do not use a pesticide continuously to prevent the cotton bollworm from becoming resistant to the drug. Drug concentration The concentration of pesticides prepared according to the instructions cannot be increased or decreased arbitrarily. Increasing the concentration tends to cause phytotoxicity in cotton plants, and reducing the concentration will reduce the efficacy. Liquid dosage If the amount of the liquid is small, the cotton plant is not evenly sprayed, and the insect control effect is poor. When controlling the second-generation cotton bollworm, the amount of liquid per acre should not be less than 40 kg. When controlling the third and fourth generations of cotton bollworm, the amount of liquid per acre is 80-100 kg. All the cotton plants are evenly treated and the effect is good. Ceramic Aluminum Sound-absorbing Panel Ceramic Aluminum Sound-Absorbing Panel,Sound Absorption Panels Ceiling,Sound Absorption Panels Shangdong Oushibao New Materials Co.,Ltd , https://www.oushibaomgo.com
Points for attention of high-efficiency pesticides against cotton bollworm