苯醚甲环唑·吡虫啉拌种控虫防病效果及其对小麦生长的影响

Control Effects of Soaking Seeds with Difenoconazole·Imidacloprid on Diseases and Pests of Wheat and Its Influences on the Growth of Wheat

[目的]研究苯醚甲环唑·吡虫啉对小麦主要病虫害的防治效果。[方法]2016—2017年,通过大田小区试验研究苯醚甲环唑·吡虫啉FS不同处理拌种对小麦出苗率、生长情况(株高和鲜重等)、小麦纹枯病和蚜虫的防治效果及小麦产量的影响。[结果]600 g/L苯醚甲环唑·吡虫啉FS拌种处理对小麦安全,对小麦出苗率的影响较小,药剂处理小麦种子的平均出苗率为76.38%~78.87%,与空白对照无显著差异。600 g/L苯醚甲环唑·吡虫啉FS能有效控制小麦整个生育期的蚜虫为害(可能与蚜虫发生轻有关),对小麦苗蚜和穗蚜的平均防效分别为83.72%~89.92%和74.63%~76.12%;对小麦纹枯病防效拔节期和枯白穗显症期的防效分别为42.11%和50.82%,白穗率显著低于空白对照。[结论]苯醚甲环唑·吡虫啉拌种对小麦生长发育及产量均有一定的促进作用,同时对小麦纹枯病有一定的控制作用。

[Objective] To study the control effects of difenoconazole·imidacloprid on main diseases and pests of wheat. [Method] During 2016- 2017,the control effects of soaking seeds with different treatments of difenoconazole·imidacloprid on the main diseases and pests of wheat and their influences on the growth and development of wheat were studied by field plot experiment. [Result] 600 g/L difenoconazole·imidacloprid was safe to wheat, it had smaller effects on the seedling emergence rate of wheat. The average seedling emergence rate of wheat in the treatments of difenoconazole·imidacloprid was 76.38%-78.87%, which had no significant difference with blank control. 600 g/L difenoconazole·imidacloprid FS could effectively control the damage of aphids in the whole growth stage of wheat, their average control effects on the seedling aphids and ear aphids of wheat were 83.72%-89.92% and 74.63%-76.12% respectively. The control effect on wheat aphids in each treatment gradually decreased with the time. The highest control effect on wheat sheath blight in jointing stage and withered ears appearing period was 42.11% and 50.82% respectively.The rate of withered ears in the treaments of difenoconazole·imidacloprid was significantly lower than that in blank control. [Conclusion] Difenoconazole·imidacloprid could promote the growth and yield of wheat, and it had certain control effects on wheat sheath blight.