Leafhopper (Red spider) is one of the main pests that harm cotton and marigold, especially in the middle and late stages of the growth of cotton and marigold. Leaf borer damage has a greater impact on crop yields. Harmful years can result in reduced yields. Absolutely. This year, the high temperature and dry weather in summer in our county is favorable to the occurrence of cotton field and marigold field spider mite (Red spider). According to the survey of marigolds and cotton fields conducted by the plant protection personnel of the Agricultural Technology Center in early July, Ye Hao has already started spotting and heavier parts have occurred.
I. Occurrence of leafhoppers
1, cotton fields:
Systematic investigation: On July 5th, a cotton field system survey showed that there was a 5% planting rate and 17 planted maggots. A random survey was conducted on the cotton fields and it was found that individual patch plots of cotton leafhoppers occurred, and the lower leaves of the cotton plants had red leaves. . This year, the high temperature weather in June and July in our county had a restraining effect on cotton aphid, and the amount of natural enemies in the cotton field was also small. The number of net enemies in the cotton field was one hundred nets, which was less than the number of natural enemies in the same period of last year (46 net predators). It is beneficial to the occurrence of cotton leafhoppers in the field.
Daejeon survey: surveying the occurrence of cotton leafhoppers in towns such as Taheqi, Ishkul, Chagh Bagh, and Wudak, and due to high temperature and unsatisfactory irrigation in some plots, spotting of cotton leaf crops occurred and the hazards increased. trend.
2. Jushang Jutian: The survey of the marigolds of 17 villages in Yishikuili Township, 14 villages in Ailixihu Township, 6 villages in Qayrebagh Township, and 2 villages in Taheqi Township have all found that leafhoppers are endangered. Among them, Yishikuli Township 17 village marigold red phenomenon.
According to the field survey and the weather conditions in June and July, it is expected that the occurrence of leaf aphid in our county will occur moderately and local partiality will occur. The peak of damage will occur from late July to mid-August, and the degree of occurrence will be slightly heavier than last year.
Second, prevention and control suggestions:
1, promptly remove the weeds in the field, the head, the ditch, reduce the source of insects.
2, timely watering, with a reasonable top-dressing water, to prevent the cotton field and marigold field drought.
3, chemical pick governance. Strengthen the monitoring and prevention of leafhoppers. Combined with cotton topping, marigold picking, etc. to strengthen monitoring of field pests, localized plots of lobe in Yefen were promptly developed for spotting and avoiding large-scale pesticide application. Chemical picking was conducted on the heavy-damaged plots. The use of 1.8% of avermectin EC 20 g/mu or 10% Fuling 1500 times liquid or 73% of the alginate 1000-2000 times liquid spray control, requiring the top and bottom to penetrate. The above agents are used alternately to prevent and produce drug resistance.
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