摘要： 为了有效防治玉米粗缩病,采用内吸性杀虫剂拌种防治介体昆虫的方法控制玉米粗缩病.结果表明:利用新烟碱类杀虫剂噻虫嗪(有效成分)2.1～2.8 g拌1 kg种子,对玉米灰飞虱的防治效果为73.90%～83.98%,对玉米粗缩病的防治效果喇叭口期为85.35%～87.05%,收获期为72.15%～73.18%;用吡虫啉(有效成分)2.8～3.5 g拌1 kg种子对玉米灰飞虱的防治效果为60.2%～83.18%,对玉米粗缩病的防治效果喇叭口期为8.10%～87.61%,收获期为72.35%～7.3%;与空白对照相比小区产量增加了36.38%～38.06%.而且拌种对种子无害,各药剂拌种处理的种子出苗率在90%以上,与不拌种差异不显著.

关键词: 噻虫嗪, 吡虫啉, 拌种, 灰飞虱, 玉米粗缩病

Abstract: Maize rough dwarf virus (MRDV) that spread by vector Laodelphax striatellus Fallen was a virus that had a latent development period of 15 to 20 d.The direct control effect for MRDV was worse,but spray key time to control vector was difficult to grasp.Seeds dressing with imidacloprid and thiamethoxam against Laodelphax striatellus was effective prevention and control technology of maize rough dwarf virus.The control effect of seed dressing with imidacloprid and thiamethoxam on Vector Laodelphax striatellus Fallen and maize rough dwarf virus(MRDV) was carried out in field.The results showed that the control effect of seed dressing to vector Laodelphax striatellus Fallen was 73190 % 83198 % and 6014% 83118 %;while the control effect to maize rough dwarf virus was 85135 % 87105 % and 84110 % 87161 % at large2bugle stage and 72115 % 73118 % and 72135 % 74134 % at harvest time with thiamethoxam at 211 218ga.i./ kg seed and imidacloprid at 218 315ga.i./ kg seed,respectively.Compared to no treatment,the yield added 36138 % 38106 %.Seed dressing with imidacloprid and thiamethoxam was no2injury to corn seed and the germinating rate was above 90 %.Seed dressing treatment with imidacloprid and thiamethoxam would delay the mean time for seed germination and seedling emergence in 1 4 d after the sowing,yet afterwards the growth speed of corn seedling was faster and the seedling was robust.Thus it can be seen that seed dressing with imidacloprid and thiamethoxam not only had effect on Vector Laodelphax striatellus Fallen,but also could prevent or alleviate MRDV occurrence and spread,and had the significant increase effect on yield.Seed dressing was one effective measure of control and prevent against MRDV.

Key words: Thiamethoxam, Imidacloprid, Seed dressing, Laodelphax striatellus Fallen, Maize rough dwarf virus

中图分类号: 

• S35.13