Practice has proved that cotton is to be productive and management is the key. In the growth and management of cotton , spraying is an important part of management. Common pests in cotton: locusts, red spiders, blind mites, red bollworms, cotton bollworms, gold steel drills, etc. These pests have different parts for spawning and harm, so be sure to pay attention to the parts.
In the cotton seedling stage, aphids, red spiders, etc. are harmful on the back of the cotton leaves. When spraying pesticides, the syrup should be sprayed on the back of the leaves. The red bollworm that occurs in the middle and late stages of cotton lays eggs on the back of the tender tip, tender stem and young leaves. After ringing, most of the eggs are produced between the young bracts and the bell shell, and the larvae enter the young age. The eggs of the cotton bollworm are produced on the front side of the cotton leaf, and the larvae bite the buds, flowers, and bells. The eggs of the blind cockroaches are produced in the leaves, and the sap of young leaves and small buds are sucked early.
Control the red bollworm, the syrup should be sprayed on the lower blue bell; control the cotton bollworm, the syrup should be sprayed evenly on the front and the tender tip, the stems and leaves and the buds; the blind mites are large in activity, and the syrup should be sprayed on the front of the leaves. , tender, stem and bell.
The majority of cotton farmers should pay attention to: in the cotton spray, to protect the flower bell, cotton often blooms in the morning, if sprayed at this time, it is easy to make the pollen particles swell and rupture, affecting normal pollination, and spraying after 4 pm The drug, the pollination process is basically over, and the spray effect is small.
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