Study On Occurrence Regularity And Green Control Techniques Of Wheat Pest In Taihe County

In this thesis, based on the the survey data from 2005 to present, the major pest species and occurrence on wheat of the major wheat producing areas( Taihe county, central region of Huang-Huai-Hai) were investigated and analyzed. The results were useful for guiding the wheat pest green prevention and control. The main results are as follows:1. A field survey of the wheat pests was conducted in Taihe County. The results showed that 21 kinds of wheat pests were found, which belonging to 2 classes and seven orders. The dominant species are Schizaphis graminum, Sitobion avenae, Gryllotalpa unispina, Penthaleus major and Sitodiplosis mosellana. Generally, the wheat pests were occurred seriously in Taihe County. Wheat aphids were occurred seriously in the wheat earing stage. However, the incidence of wheat midges was relative less. Soil insect pests were occurred moderately.2. Wheat Pests can occur throughout the wheat growing period. The key pests during wheat seeding time, jointing-booting stage and heading-filling stages were soil pests, wheat aphids and spiders and aphids, respectively.3. 7.5% perchloric ? Acetamiprid ME and 3% acetamiprid EC showed good control effect on wheat aphids. The 10 d control efficiency reached more than 93.8%. At the same time, these pesticides were safety to predators of wheat and can be used as recommend pesticides during emergency prevention and control of wheat aphid.4. In order to control the wheat pests of Taihe County, three important stages of wheat should be paid attention, i.e. seeding time, jointing-booting stage and heading-filling stages. On the premise of the accurate prediction of the pests, we should adopt an ecosystem perspective to establishing the green control techniques of wheat pest. The green control techniques of wheat pest should be based on the agricultural cultivation and management measures, combining physical and biological control methods. Efficient and low toxicity pesticides can be used during emergency prevention and control of wheat pests.