First, the current occurrence of diseases and insect pests and the next stage of trend prediction
1. Cotton bollworm: the number of adult boll moths in the overwintering generation is small, and the overall occurrence of a generation of cotton bollworms is moderately mild, and some cotton fields and processed tomato fields occur moderately; some cotton fields are controlled, and the current field is in a generation of larval harm period. It is estimated that the peak period of feathering of adult bollworms in the first generation is late June, the peak period of second-generation egg hatching and the best control period is from late June to early July, and the incidence is moderate, and the occurrence of some cotton and tomato fields is moderate.
2, cotton leaf mites: the weather in May is more unfavorable to the occurrence of cotton leaf mites, into the early June after the occurrence of cotton leaf mites developed rapidly, most of the cotton fields are in the central plant and spot occurrence stage, some serious cotton fields have a mite plant rate of 1-5%, and prevention and control. Later climatic conditions are very favorable for the occurrence of cotton leaf mites, and it is expected that cotton leaf mites will spread rapidly.
3, cotton aphid: the recent climatic conditions are more conducive to the occurrence of cotton aphids, most of the current cotton fields are in the central plant and spot occurrence stage, cotton field hundred plants aphid volume of 2-48 heads. The weather in June is more favorable for the occurrence and reproduction of cotton aphids, which are expected to migrate and spread in the cotton fields in the near future.
4, cotton blind bugs: blind bugs began to move into the cotton field in late May for harm, some of the alfalfa land and the cotton field blind tree with strong growth is more harmful, 100 insect mouths 1-3 heads. June is the peak period for cotton blind bugs.
5. Double-spotted leaf beetle: In early June, it has begun to enter some cotton fields as a pest, and the peak period of harm is expected to be from mid-June to early July, and some cotton and corn fields in the Anjihai and Xiayedi areas are moderately mild, and other group farms are mild.
6. Corn borer: The current peak period of adult feathering, late June is the peak period of harm, and the degree of occurrence is moderate.
7. Wheat rust: According to the investigation of some regimental farms, the incidence of wheat rust is mild, and the incidence rate is 2-7%.
8. Tomato disease: mainly bacterial class point disease, and the incidence of disease in the field is 6-28%.
Second, the recent plant protection work suggestions
June is a critical period for plant protection work, the majority of agricultural workers should recognize the current more severe situation of diseases and insects, firmly establish the concept of "scientific plant protection, public plant protection, green plant protection", comprehensively monitor the occurrence of diseases and insect pests, and use scientific means to control the harm of diseases and insects to a minimum.
1. Go all out to do a good job in the prevention and control of cotton bollworms. First, continue to do a good job in the investigation and monitoring of cotton bollworms, and promptly control cotton fields where the amount of eggs in the current cotton fields meets the control indicators; second, according to the monitoring situation, it is necessary to open the insecticidal lamps in a timely manner, place poplar branches, and use cotton bollworm adult insect food traps to trap a generation of cotton bollworm adults; third, when cotton is topped, the top will be taken out of the cotton field and buried deeply, reducing the amount of eggs in the field and reducing the harm of cotton bollworm larvae; fourth, In late June, when the cumulative number of eggs in 100 plants in the cotton field reaches 10 or the 100 larvae reach 5, pesticides such as metamidoamino avermectin benzoate, indigovirus, cotton bollworm karyo-polyhedral virus, and chlorhexabenzamide are used in a timely manner, and attention is paid to the rotation and use of pesticides; fifth, wheat should be ploughed in time after harvest; sixth, strengthen the investigation of the second generation of cotton boll eggs and larvae in processed tomato fields, and prevent and control them in a timely manner.
2. Do a good job in the prevention and control of cotton leaf mites before cotton head water. The central plant of cotton leaf mites was controlled by spot pieces, and when the mite rate reached 5%, general prevention was carried out, and the use of avermectin, tetramethazine, thiamethione, pyridoxine and spironite esters and other specialized acaricides were used to control leaf mites in the stage of spot tablet occurrence.
3. Carefully monitor the migration and flight of the cotton aphid and the investigation and prevention of the central plant. Labels should be inserted for the occurrence of central strains and spot chips, and pesticide sprays such as acetamidone, pyrolidone, thiamethoxazine, flufenamipridnitrile, imidacloprid and other pesticide sprays should be treated in time to prevent winged aphids from migrating and flying.
4. Do a good job in the prevention and control of double-shift leaf nails. At the peak of the double-spotted leaf beetle harm to cotton, it can be prevented by netting or using pesticides such as imidacloprid when the population of 100 insects reaches more than 30.
5. Do a good job in the investigation and prevention of corn borer. According to the survey of corn borer, pesticides such as chlorhete benzamide and permethrin were used for corn plots with large egg sizes.
6. When the mouth of the cotton blind bug hundred plants reaches 6, it is timely controlled with acetamiprid + avermectin or flufenoxamine, and the spray should be sprayed morning and evening in the application time.
7. Strengthen the investigation and prevention of wheat rust. The disease rate of leaves reaches 5-10%, and sprays such as triazolone, nitricoxazole, and methylthioxine are used for control.
8. Do a good job in the prevention and treatment of tomato bacterial spot disease. It is recommended to use pesticides such as copper thiamethiosis and copper hydroxide.
9. Do a good job in the early investigation and prevention of grape downy mildew, powdery mildew, felt disease, white star flower golden turtle and other diseases and insect pests. Early disease occurrence can be removed from the disease leaf buried deeply; powdery mildew is controlled by pesticides such as enazolidinol, nitricosazole and triazolone; downy mildew is controlled by pesticides such as Bordeaux liquid, downy mildew hydrochloride, enoyl morpholine, and porphyrister.
10. Pesticide users shall comply with the relevant national pesticide safety and rational use system, properly keep pesticides, and take necessary protective measures in the process of dispensing and using drugs to avoid pesticide use accidents; pesticide users should properly collect pesticide packaging and other wastes, and pesticide operators should recycle pesticide waste to prevent pesticide pollution of the environment and pesticide poisoning accidents.
Author: Zhang Xinquan, Source: Shihezi Agricultural Technology Extension Station of the Eighth Division, Graphic Editor: Tianshan Plant Protection, please indicate the source when reprinting!