When cotton is planted for another year, many cotton farmers still think that since they are insect-resistant cotton, they do not need to control any insect pests. This is not the case. This is because the insect-resistant cotton currently promoted is resistant to lepidopteran pests such as bollworms and pink bollworms, while it is not resistant to subterranean pests, red spiders, cotton aphids, and blind aphids. Resistance is also not ideal. Here, the author specifically reminded the cotton farmers:
The following methods can be used to control underground pests, cotton aphid, red spider and other pests:
When the cotton aphid occurs seriously, 40% omethoate 1000-1500 times, or 50% phoxim 1500 times, or 50% Pipa WP can be sprayed and used for 2000 times.
Prevention and control of cotton spider mites can be used 73% Kotel 2500 times, etc., can receive good results.
Practice has proved that insect-resistant cotton does not need to control the first and second generations of cotton bollworm, and the third and fourth generations of cotton bollworm should be controlled in time according to the pest situation. When 100 larvae over 2 years old reach 120 heads, comprehensive prevention and control shall be carried out in time.
When planting insect-resistant cotton, do not intercropping with crops such as beans and peanuts that are favored by cotton bollworms to avoid transfer of harmful cotton to older larvae.