Major Diseases and Insect Pests in Cotton Buds
The period of budding from flowering to flowering is budding, and it takes about 25-30 days. This period is the period of occurrence of various pests such as cotton bollworm, blind stink bug, cotton red spider strain, cotton wilt verticillium wilt, stem blight, etc. If the control is unfavorable, it often causes dead plants or causes buds and flowers to fall off. Bell and cotton quality.
Cotton buds coincide with the occurrence of the second generation of cotton bollworm. Since most of the plants are now insect-resistant cotton, they are resistant to the second-generation cotton bollworm and generally do not require medication for control. Secondly, during this period, attention should be paid to the prevention and control of cotton-blind stink bugs. This pest mainly sucks and sucks cotton sap from adult nymphs and nymphs, resulting in shedding of boll bells, breakage of broken heads and broken branches of cotton plants. The cotton field where the cotton grows vigorously and the buds grow more often occurs more heavily. With the popularization of insect-resistant cotton in recent years, the number of medications in cotton fields has decreased, and cotton blindness has become increasingly serious. The budding cotton budding period is at the end of the second generation of blind warts. The cotton budworms hide in the weeds or in the earth seams during the day and move to the cotton in the evening for feeding hazards, which are not easily discovered. Therefore, cotton farmers should pay attention to observing hazards, and promote the prevention and treatment of cottonseed warts. The first is to remove weeds in the fields and roadsides, and eliminate the habitat of cotton-crapworms. The second is that in mid-June and mid-July, the control of cotton blind lice occurs during the prosperous period. It can be sprayed with 4.5% beta-cypermethrin 1000 times solution plus 10% imidacloprid 1000 times solution. 5-7 days once, continuous control 3-4 times. Pay attention to medication in the early morning or early evening. During this time, we must also pay attention to the prevention and control of cotton red spiders. The pests are mostly concentrated on the back of cotton leaves and suck juice. After the damage of cotton leaves, chlorotic yellow and white spots first appear, followed by local erythema, and erythema expands and scorches. Such as fire. There are several peaks during the middle growth period of cotton, and attention should be paid to inspection. Can be controlled with 1.8% avermectin 2000 times or Daphne 800-1000 times spray.
Bud stage is also prone to withering and verticillium wilt disease. As wilt disease develops most frequently before and after cotton budding, the cotton bud stage should pay special attention to the inspection of dry and verticillium wilt, especially the continuous cropping of cotton fields with severe disease last year. Do a good job of prevention. When there is continuous rain and cold weather, special precautions should be taken. 1. If sporadic diseased plants are found in the field, they should be removed promptly and the diseased holes should be disinfected. 2, preventive drugs: fulvic acid organic fertilizer spray 600-800 times the foliage, add fungicide, 7-10 days once, and even spray 2-3 times. 3, control of the condition: medication immediately after the rain, mu cotton net dry 30 grams of watered 45 kg, 80% Icicin can be used, 12.5% ​​quick-effect such as Weiling sprinkler irrigation combination, interval 5 days, continuous medication 2-3 Times.
During this time, farmers’ friends must pay attention to timely control, which means that the cotton fields that thrive after the emergence of cotton plants should be timely controlled. In general, 1-2 g of dilute-threonine and 15 kg of water are used in the mu, evenly sprayed on the top of the cotton plant. For cotton fields with inconsistent cotton growth, only large cotton plants are chemically controlled during chemical control, and small cotton plants are not chemically controlled to balance the growth of the cotton plants so that the growth of the cotton plants is consistent.
Cotton buds coincide with the occurrence of the second generation of cotton bollworm. Since most of the plants are now insect-resistant cotton, they are resistant to the second-generation cotton bollworm and generally do not require medication for control. Secondly, during this period, attention should be paid to the prevention and control of cotton-blind stink bugs. This pest mainly sucks and sucks cotton sap from adult nymphs and nymphs, resulting in shedding of boll bells, breakage of broken heads and broken branches of cotton plants. The cotton field where the cotton grows vigorously and the buds grow more often occurs more heavily. With the popularization of insect-resistant cotton in recent years, the number of medications in cotton fields has decreased, and cotton blindness has become increasingly serious. The budding cotton budding period is at the end of the second generation of blind warts. The cotton budworms hide in the weeds or in the earth seams during the day and move to the cotton in the evening for feeding hazards, which are not easily discovered. Therefore, cotton farmers should pay attention to observing hazards, and promote the prevention and treatment of cottonseed warts. The first is to remove weeds in the fields and roadsides, and eliminate the habitat of cotton-crapworms. The second is that in mid-June and mid-July, the control of cotton blind lice occurs during the prosperous period. It can be sprayed with 4.5% beta-cypermethrin 1000 times solution plus 10% imidacloprid 1000 times solution. 5-7 days once, continuous control 3-4 times. Pay attention to medication in the early morning or early evening. During this time, we must also pay attention to the prevention and control of cotton red spiders. The pests are mostly concentrated on the back of cotton leaves and suck juice. After the damage of cotton leaves, chlorotic yellow and white spots first appear, followed by local erythema, and erythema expands and scorches. Such as fire. There are several peaks during the middle growth period of cotton, and attention should be paid to inspection. Can be controlled with 1.8% avermectin 2000 times or Daphne 800-1000 times spray.
Bud stage is also prone to withering and verticillium wilt disease. As wilt disease develops most frequently before and after cotton budding, the cotton bud stage should pay special attention to the inspection of dry and verticillium wilt, especially the continuous cropping of cotton fields with severe disease last year. Do a good job of prevention. When there is continuous rain and cold weather, special precautions should be taken. 1. If sporadic diseased plants are found in the field, they should be removed promptly and the diseased holes should be disinfected. 2, preventive drugs: fulvic acid organic fertilizer spray 600-800 times the foliage, add fungicide, 7-10 days once, and even spray 2-3 times. 3, control of the condition: medication immediately after the rain, mu cotton net dry 30 grams of watered 45 kg, 80% Icicin can be used, 12.5% ​​quick-effect such as Weiling sprinkler irrigation combination, interval 5 days, continuous medication 2-3 Times.
During this time, farmers’ friends must pay attention to timely control, which means that the cotton fields that thrive after the emergence of cotton plants should be timely controlled. In general, 1-2 g of dilute-threonine and 15 kg of water are used in the mu, evenly sprayed on the top of the cotton plant. For cotton fields with inconsistent cotton growth, only large cotton plants are chemically controlled during chemical control, and small cotton plants are not chemically controlled to balance the growth of the cotton plants so that the growth of the cotton plants is consistent.
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