Blind stink bug
There are many types of blind deafness, and the main hazards to cotton are green-lipped beetle, mid-black-legged deer, three-legged blind beak, and blind deafness. They occur four to six generations a year and can be harmful at all stages of cotton growth and development. In the mid-June period from mid-June to mid-July, the branches and leaves were thick and the leaves were riddled with tears.
However, the symptoms of cotton infestation during the reproductive period are different. In the cotton cotyledon stage, after the growth point is damaged, the tender tips are dry and no longer grow new shoots. The farmers call it “public cottonâ€. When there are 3 to 5 true leaf wounds in the seedling stage, the end buds will be picked up. Injury is dead, but new shoots can be produced between leaves and leaves to regenerate secondary fruit branches to form a multi-headed cotton. In some places, they are called "breaking head madness." Young leaves suffer damage, and small black spots appear on the leaves, and then the holes that have been damaged become Irregular size holes, commonly known as "broken leaf madness"; fruit branch top victims, leaf pods will breed vegetative branches, the formation of broom seedlings; young bud victims, one is 2 to 3 days after the dry, the other is the leaves open, Then the buds fall off, the third is the dark spots appearing in the big buds, the flowers cannot be opened normally, the young bells suffer, and the epidermis appears dark brown water stain spots, and when the cotton bolls are severe, the bolls fall off or covered with dark spots and the quality is reduced.
To start early
When is it a good time to prevent blind monks? Generally from the time when budding cotton begins to investigate, when there are about 100 insects in the field and about 3% of the damaged cotton plants, they can be used for drug control. If the prevention and control are not timely, there will be a great tendency to enter the rainy season. Therefore, it is imperative to start early and eliminate the obscure images at the spotting stage.
In agricultural control, it is necessary to reduce the amount of nitrogen fertilizer and increase the use of phosphorus and potassium fertilizers. Second, we must control cotton plant shape to ensure ventilation and light in cotton fields. Third, we must reduce the humidity in cotton fields. Fourth, weeds must be removed from cotton fields to reduce the number of insects. . In terms of chemical control, it can be used 25% blind cesium (imidacloprid, mineral oil) 1000 to 1500 times or 2% emamectin benzoate soluble liquid 5000 times or 3% acetamiprid 1500~ 2000 times spray control
Blinds and elephants focus more harm in the bud to flowering period, in this period generally about once every 7 days spraying control, spray a total of 3 to 4 times, high efficiency pesticides can be appropriately reduced the number of spraying. When spraying, first spray from around the cotton field, and then turn to the middle of the field to prevent the blind to escape. Blind stink bugs are more harmful at night, spraying the best results after 5 pm.
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