Abstract: To study the safety of 31.9% imidacloprid·tebuconazole suspension seed coating agent on the main wheat varieties in Henan Province, demonstration test of wheat seed dressing with 31.9% imidacloprid·tebuconazole suspension seed coating agent was conducted,and the effects on the growth and development of wheat were investigated.The result showed that 31.9% imidacloprid·tebuconazole suspension seed coating agent had no harm to the tested wheat at the recommended dosage(31.9%imidacloprid·tebuconazole suspension seed coating agent:Wheat seed was 4 mL∶1 kg).Wheat seed dressing with 31.9% I imidacloprid·tebuconazole suspension seed coating agent could improve the emergence rates of Qiule 2122,Zhoumai 27,Xinong 979,Yumai 158,Aikang 58,Jimai No.4,Kaimai 21,Fanmai No.8 and Fengdecunmai No.1 significantly,the emergence rates were 90%,98%,89%,96%,96%,70%,83%,98% and 81%,respectively,while the emergence rates without 31.9% imidacloprid·tebuconazole suspension seed coating agent were 75%,86%,82%,72%,89%,62%,76%,78% and 69%,respectively.The investigation of the basic seedling number showed that seed dressing with 31.9% imidacloprid·tebuconazole suspension seed coating agent had no adverse effect on the emergence of the tested wheat varieties.Wheat seed dressing with 31.9% imidacloprid · tebuconazole suspension seed coating agent could improve the tillering number and the fresh weight of the overground part of Yumai 158,Bainong 207 and Tianmin 198,indicating that it could promote the growth of wheat plants.The tillering numbers were 5,4 and 4,respectively,while the tillering numbers without 31.9% imidacloprid·tebuconazole suspension seed coating agent were 4, 3 and 3, respectively.The fresh weights of the overground part were 8.31,8.25 and 7.10 g,respectively,while the fresh weight of the overground part without 31.9% imidacloprid·tebuconazole suspension seed coating agent were 6.62,6.11 and 5.72 g,respectively.The root number,root length and the fresh weight of the underground part of Xinong 979 and Zhoumai 22 were improved after seed dressing with 31.9% imidacloprid·tebuconazole suspension seed coating agent,indicating that it could promote the growth of wheat root.The root numbers were 11 and 10,respectively,while the root numbers without 31.9% imidacloprid·tebuconazole suspension seed coating agent were 9 and 8,respectively.The root lengths were 11.8 and 11.4 cm,respectively,while the root lengths without 31.9% imidacloprid·tebuconazole suspension seed coating agent were 10.2 and 10.1 cm,respectively.The fresh weights of the underground part were 0.91 and 0.65 g,respectively,while the fresh weights of the underground part without 31.9% imidacloprid·tebuconazole suspension seed coating agent were 0.81 and 0.45 g,respectively.In summary, it can be seen that 31.9% imidacloprid·tebuconazole suspension seed coating agent is safe for the main wheat varieties in Henan Province dressing with the recommended dosage(31.9% imidacloprid·tebuconazole suspension seed coating agent ∶Wheat seed was 4 mL∶1 kg),and has a certain promotion effect on the growth of wheat.

Key words: Wheat, Seed dressing, Imidacloprid·tebuconazole suspension, Phytotoxicity of seed coating agent, Safety

摘要： 为了解31.9%吡虫啉·戊唑醇悬浮种衣剂对河南省主播小麦品种的安全性,对河南省主播小麦品种进行31.9%吡虫啉·戊唑醇悬浮种衣剂包衣示范试验,调查其对小麦发芽及生长发育的影响。结果显示,31.9%吡虫啉·戊唑醇悬浮种衣剂在推荐剂量（4 mL 31.9%吡虫啉·戊唑醇悬浮种衣剂包衣1 kg小麦种子）下使用对供试小麦品种均无不良影响。31.9%吡虫啉·戊唑醇悬浮种衣剂处理可明显提高秋乐2122、周麦27、西农979、豫麦158、矮抗58、济麦4号、开麦21、泛麦8号、丰德存麦1号的出苗率,其出苗率分别为90%、98%、89%、96%、96%、70%、83%、98%、81%,未经药剂处理的出苗率分别为75%、86%、82%、72%、89%、62%、76%、78%、69%；基本苗数调查结果显示,31.9%吡虫啉·戊唑醇悬浮种衣剂处理对各小麦品种出苗无不良影响；31.9%吡虫啉·戊唑醇悬浮种衣剂处理可明显提高豫麦158、百农207、天民198等的分蘖数、地上鲜质量,经药剂处理后分蘖数分别为5、4、4个,未经药剂处理的分蘖数分别为4、3、3个,经药剂处理后地上鲜质量分别为8.31、8.25、7.10 g,未经药剂处理的地上鲜质量分别为6.62、6.11、5.72 g,说明该种衣剂对小麦植株的生长有促进作用；31.9%吡虫啉·戊唑醇悬浮种衣剂处理可明显提高西农979、周麦22等的根数（经药剂处理后根数分别为11、10条,未经药剂处理的根数分别为9、8条）、根长（经药剂处理后根长分别为11.8、11.4 cm,未经药剂处理的根长分别为10.2、10.1 cm）、地下鲜质量（经药剂处理后地下鲜质量分别为0.91、0.65 g,未经药剂处理的地下鲜质量分别为0.81、0.45 g）,说明该种衣剂对小麦根系生长有促进作用。综上,31.9%吡虫啉·戊唑醇悬浮种衣剂在推荐剂量（4 mL31.9%吡虫啉·戊唑醇悬浮种衣剂包衣1 kg小麦种子）下使用对供试的河南省主播小麦品种安全,且对小麦生长有一定的促进作用。

关键词: 小麦； 种子包衣；吡虫啉·, 戊唑醇； 种衣剂药害； 安全性