Cotton Blinds are a class of pests, and there are six species in China. Among them, the most common species of green-lipped animals are the most common ones, and the three-spotted and the blind species mainly occur in the north. The cotton maggots are small pests, adults only a few millimeters long; forewings half filmy, half leathery; mouthparts sucking. Blind stinkbug was originally a minor pest of cotton. In the past, it was controlled by the use of chemicals to control bollworm. In recent years, Bt insect-resistant cotton has been planted in large areas, and insects have been used little or no. Has risen as the main pest of cotton. They harm the cotton's top buds, side hearts, flower buds, young bells, and young leaves, and suck in cotton sap. From the cotton seedlings to growing young bells, the damage period lasts up to 3 months. The cotyledon growth point became black and dry, and the growth was stopped; the end buds in the true leaf stage died, adventitious buds clustered to form a “long cottonâ€; the young buds and young bells first became yellow-brown and then dried off; the young leaves were broken up after being unfolded. Commonly known as "breaking leaf crazy."
The blindness is like wet, and the rainy year is heavier. The first irrigation time is early, flood irrigation and dense plants, crazy long, poor pruning are all conducive to breeding and harm.
The green-lipped iridescent elephant can occur 3 to 5 generations a year. The first-generation adults and second-generation nymphs lived on earthworms, scorpions, broad beans, and wormgrasses near the cotton fields. In early June, the second-generation adults migrated to the cotton fields, which coincided with the cotton seedling stage. However, we cannot ignore the prevention and treatment in the middle and later stages.
Prevention and control of blindness must first clear roadside, headland weeds and cotton, reduce the source of early winter overwhelming. Second, it is necessary to apply reasonable fertilization, avoid partial application of nitrogen fertilizer and large-scale application of nitrogen fertilizer in the middle and later stages to prevent excessive growth of cotton. Timely pruning, pay attention to the removal of long cotton and thin branches. Chemical control starts from the seedling stage and is controlled throughout. Attention should be paid to the forecast of the local agricultural technology department. In the seedling stage, 100 to 40% of insects, 10 to 12 buds, and 20 to 25 heads of bolls are sprayed in time. More pharmaceuticals are available, including 80% fipronil (Frigeride) water dispersant 2 grams per acre or 5% butene verafloril EC 1000 times, 48% chlorpyrifos (Lesphene) 60~80ml/mu, 40% profenofos EC 1500x, 10% imidacloprid WP 2000x, 40% phoxim EC 1000x, 5% fluorinated carbureol 200g/mu, 1.8% AVI It can also be used as a 3000-fold dilution of methotrexate EC or as a 1000-times dilution of 50% malathion EC. It is important to pay attention to the organization and fight drugs, choose to apply in the evening, and focus on spraying the tender heads, the side hearts and the bells.
The blindness is like wet, and the rainy year is heavier. The first irrigation time is early, flood irrigation and dense plants, crazy long, poor pruning are all conducive to breeding and harm.
The green-lipped iridescent elephant can occur 3 to 5 generations a year. The first-generation adults and second-generation nymphs lived on earthworms, scorpions, broad beans, and wormgrasses near the cotton fields. In early June, the second-generation adults migrated to the cotton fields, which coincided with the cotton seedling stage. However, we cannot ignore the prevention and treatment in the middle and later stages.
Prevention and control of blindness must first clear roadside, headland weeds and cotton, reduce the source of early winter overwhelming. Second, it is necessary to apply reasonable fertilization, avoid partial application of nitrogen fertilizer and large-scale application of nitrogen fertilizer in the middle and later stages to prevent excessive growth of cotton. Timely pruning, pay attention to the removal of long cotton and thin branches. Chemical control starts from the seedling stage and is controlled throughout. Attention should be paid to the forecast of the local agricultural technology department. In the seedling stage, 100 to 40% of insects, 10 to 12 buds, and 20 to 25 heads of bolls are sprayed in time. More pharmaceuticals are available, including 80% fipronil (Frigeride) water dispersant 2 grams per acre or 5% butene verafloril EC 1000 times, 48% chlorpyrifos (Lesphene) 60~80ml/mu, 40% profenofos EC 1500x, 10% imidacloprid WP 2000x, 40% phoxim EC 1000x, 5% fluorinated carbureol 200g/mu, 1.8% AVI It can also be used as a 3000-fold dilution of methotrexate EC or as a 1000-times dilution of 50% malathion EC. It is important to pay attention to the organization and fight drugs, choose to apply in the evening, and focus on spraying the tender heads, the side hearts and the bells.