25%咪唑烟酸水剂对非耕地杂草和狗牙根的防除效果

Effect of Controlling Weeds and Cynodon dactylon on Non-arable Land by Imazapyr 25% AS

[目的]明确25%咪唑烟酸水剂对非耕地杂草及恶性杂草狗牙根的防治效果。[方法]通过茎叶喷雾试验,比较咪唑烟酸、百草枯、草甘膦和草铵膦对非耕地杂草及狗牙根的防治效果。[结果]25%咪唑烟酸水剂1125、1500 ga.i./hm^2处理药后40 d对非耕地杂草的株防效分别为98.45%、99.22%,显著高于41%草甘膦1500 g a.i./hm^2株防效(94.22%)、18%草铵膦可溶液剂900 g a.i./hm^2株防效(93.75%)和20%百草枯可溶胶剂750 g a.i./hm^2株防效(74.59%);鲜重防效呈现出与株防效一致的结果;25%咪唑烟酸水剂750、1125、1500 g a.i./hm^2药后60 d对狗牙根的株防效和鲜重防效均显著高于其他处理药剂,且不易返青。[结论]咪唑烟酸可以替代百草枯、草甘膦等,防除非耕地杂草和狗牙根,持效期更长。

[Aims]The paper aims to confirm the control efficacy of imazapyr 25% AS against non-arable land weeds and bermuda grass(Cynodon dactylon)[Methods]The control efficacy of imazapyr, paraquat, glyphosate and glyphosate-ammonium was tested by filed foliage spray tests.[Conclusions]After 40 d after treatment with imazapyr25% AS at 1125, 1500 g a.i./ha, the control efficacy against non-arable land weeds were 98.45% and 99.22%respectively. The efficacy treated with imazapyr 25% AS was significantly higher than that of glyphosate 41% AS1500 g a.i./ha(94.22%), glufosinate-ammonium 18% AS 900 g a.i./ha(93.75%), paraquat 20% GW 750 g a.i./ha(74.59%);the fresh weight control efficacy showed equal effect to individual control efficacy. The total control efficacy of imazapyr 25% AS at 750, 1125, 1500 g a.i./ha was significantly higher than the three control herbicides 60 d.[Conclusions]Imazapyr can control non-arable land weeds and bermuda grass instead of glyphosate, and paraquat, and the lasting period of imazapyr was longer.