Improve the control effect of bollworm, and rational selection of drugs is the key. Among the pyrethroid pesticides, enemy-killed, cypermethrin, beta-cypermethrin, and kung fu are effective in controlling cotton bollworms, and are mainly used to control three generations of bollworms. However, cotton aphid production on the production of this type of pesticide has a high degree of resistance, almost no effect to control cotton aphid. When the cotton aphid and the cotton bollworm are mixed together, pyrethroid pesticides are generally not used. Among organophosphorous pesticides, phoxim had a good effect on controlling bollworm, but phoxim was easily decomposed with light, and the efficacy period was short. The number of medications should be increased when used. Monocrotophos has a wide insecticidal spectrum and has control effects on bollworm, cotton aphid, and spider mites, but the effect is general. It is difficult to control the harm with monocrotophos alone when the bollworm occurs, and it should be mixed with other medicaments. Among carbamate pesticides, methomyl (Wan Ling) is effective in preventing and controlling cotton bollworms and can kill young larvae and eggs. Among the compounding agents, cotton bollworm, de-lingling, Xinguang No. 1 had a prominent effect on the control of cotton bollworm. In biological pesticides, Bt preparations prevent and control bollworm, which can be sprayed during the hatching period, 2 to 3 days ahead of spraying chemical pesticides, and have a higher control effect on newly hatched larvae.

In addition, investigation of insect pests, timely spraying of pesticides, improvement of spraying methods, and improvement of control quality; alternating use of pesticides, delaying the production of pest resistance, etc., are also key measures for the prevention and control of cotton bollworm.

Green Tea

Decaf Green Tea,Organic Matcha,Iced Matcha,Loose Leaf Green Tea

Hunan Junshan Yinzhen Tea Industry Co.,Ltd , https://www.junshan-tea.com