In mid-June 2021, the current insect situation dynamics of the 148 regiments and the recommendations for plant protection work

First, the current occurrence of pests and diseases and predictions

1. Cotton leaf mite: Affected by the weather since June, cotton leaf mite has spread and spread rapidly in the cotton field. From June 8 to 9, the survey found that the current cotton field leaf mites showed a rapid development trend, and most of the cotton fields have formed a central plant, accompanied by the phenomenon of red leaves, and the points are multi-faceted. Individual severe cotton fields have occurred in spots, with mite rates of 3%-5%. Occurs moderately to mildly.

2. Cotton bollworm: Since our group carried out cotton bollworm control in some cotton fields on May 27-31, 0-1 larvae of 3-4-year-old cotton bollworm can be found in cotton fields. The peak feathering period of the first generation of adults is expected to be June 27-30, and the optimal control period is around June 30, which is expected to occur mildly.

3. Cotton aphid: It first appeared in the cotton field on May 26, and the current cotton field occurs in the center plant, and it is expected to migrate and spread in mid-to-late June.

4, cotton blind bugs: under the monitoring and reporting lights on May 27, June 8 in the cotton field first seen, according to the survey, the current cotton field hundred nymph mouth for 0-2 heads.

5. Double-spotted long-term tarsal firefly beetle: Cotton field was first seen in June 4, and the insect is currently in some company headquarters

Hazards occur in sub-plots, and the area of occurrence shows an increasing trend year by year. Partial occurrence of plots of hundreds of plants

The worm population is up to 2-8 heads. 6. Black aphid: According to the survey on June 8-9, cotton aphid showed a downward and fading trend, and there are cotton fields

The number of black aphids is 0-8% and the number of aphids per 100 plants is 0-44.

7, corn borer: under the monitoring lights, it was first seen on May 24, and it was raised in silage corn on June 8

Check, the rate of 000 corn borer plants is 0-1 head.

8. Grape diseases and insect pests: strengthen the prevention of powdery mildew and downy mildew, and closely monitor all units.

"Prevention" is the mainstay, sprayed once every 7-10 days.

9, the occurrence of natural enemies: according to the cotton field survey, 100 spiders 0-2 heads, ladybugs 0-1 heads, grasshopper adult worms 0-2.

2. Suggestions for plant protection work

1. The recent climatic conditions are conducive to the occurrence of a variety of pests, the situation of plant protection work is grim, and all units should do a good job in insect investigation and monitoring, so as to take effective measures in a timely manner to achieve diligent investigation, early detection and early prevention and control of hazards of double-spotted long-term tarsal fireflies.

2. Earnestly do a good job in monitoring and investigating the adult adult cotton bollworm and the second generation cotton bollworm larvae.

3. Strengthen the investigation and control of the central plant of cotton aphid in the field. When the central aphid source is found to be harmful in the field, timely treatment of the agent is carried out, and the agent is applied to the pesticides such as urine wash, prazidone, thiamethoxam, furofuranamide, flufenaceramide, ethyl spironium and dipropyclosate for spot control, and try to avoid large-scale spraying. The use of broad-spectrum pesticides is strictly prohibited.

4, all units should do a good job in the investigation and prevention of cotton leaf mites, take the method of man-machine combination, for the central plant (piece) to manually pick and treat, the field generally has mite rates of 2%, general prevention, the drug is 10% avermectin 10 ml / mu, 34% spironite ester 5 ml / mu, tetraformin, 20% aviethyl amarazole and so on. It is strictly forbidden to use broad-spectrum acaricides to control the cotton leaf mite in front of the head water, so that the insects are not treated, the water is not completely treated, and the water is prevented from spreading and spreading after the head water. 5. Strengthen the investigation and control of double-spotted long-planted firefly beetles, and use agents such as acetamidine or imidacloprid for chemical prevention when the mouth of 100 insects reaches 30.

6, do a good job in the investigation and prevention of blind bugs, cotton blind bugs hundred plants when the mouth reaches 5, timely prevention and control, the drug is acetamidine or thiamethoxazine, flufenacil and other pesticides prevention and control, in the application time to grasp the morning and evening two time periods for spraying.

7. Do a good job in the early investigation and prevention of grape downy mildew, powdery mildew, felt disease, leafhopper and other diseases and insect pests. According to the type of disease and insect in the field, the symptoms should be prevented and controlled, and the protective agent and the therapeutic agent should be used alternately. Powdery mildew can choose to use stone sulfur compound, phenylethocycloazole, pentrazole, enazole, nitricozole, etc., alternately used, once in 7 to 10 days, and 2 times in a row. Downy mildew can choose copper hydroxide, methylhydrin, enoyl morpholine, pyrimidine, etc., generally in the medium amount of rain can be applied in time when it can go to the ground or after irrigation. Felt disease can be controlled by spraying pyridine, spirant esters and avermectin. For the diplodocus and the green leafhopper, it is necessary to grasp the nymph stage with high-efficiency cypermethrin, imidacloprid, etc. for prevention and control.

8. Use pesticides safely and scientifically to prevent the occurrence of pesticide safety accidents.

Source: 148 Regiment Agricultural Development Service Center of the Eighth Division, 2021 Fifth Phase Of Disease and Insect Information, Photo editor: Tianshan Plant Protection.