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7、8月份是天津市二化螟、稻飞虱、玉米螟、粘虫发生为害高峰期,做好这几种虫害的防治工作是确保天津市水稻和玉米丰产丰收的关键。(1)二化螟。二化螟是对水稻危害最严重的害虫,可造成水稻枯鞘、枯心、白穗,严重影响水稻产量。可采用释放稻螟赤眼蜂、挂放性诱剂、喷施BT生物农药等生物防治的方法进行绿色防控,以起到保护生态环境、生产无公害大米的作用。(2)稻飞虱。天津市稻飞虱以灰飞虱为害为主,可造成水稻大面积枯萎死亡。防治
In July and August, it is the peak season for rice stem borer, rice planthopper, corn borer and armyworm in Tianjin. The prevention and control of these pests and diseases is the key to ensure the high yield of rice and corn in Tianjin. (1) Chilo suppressalis. Chilo suppressalis is the most harmful pest to rice, which can cause the damage of rice sheath, withered heart and white ear, and seriously affects the yield of rice. The method of biological control such as the release of Trichogramma ostriniae, hanging lure lure and BT bio-pesticide may be used for green prevention and control to play a role in protecting the ecological environment and producing pollution-free rice. (2) Planthopper. Planthopper in Tianjin is mainly caused by Laodelphax striatellus, which can cause large area wilt death of rice. Prevention and treatment