几种除草剂混配对麦田阔叶杂草的防除效果

Control Effect of Several Herbicides and Mixtures on Broadleaf Weeds in Wheat Field

通过田间试验,比较双氟磺草胺、唑草酮、氯氟吡氧乙酸异辛酯等9种除草剂及其混剂在小麦田防除播娘蒿、猪殃殃、荠菜3种阔叶杂草的效果,以期筛选出对河南省小麦田优势阔叶杂草防效较好的药剂组合。结果表明,供试药剂对小麦均比较安全,对小麦生长发育无不良影响。药后28 d,29%氯氟吡氧乙酸异辛酯WP 111.31 g/hm^2(有效成分用量,下同)+5%唑草酮WP 3.31 g/hm^2对播娘蒿和猪殃殃的防效最佳,其中对播娘蒿的株防效和鲜质量防效均达到100.00%,对猪殃殃的株防效和鲜质量防效分别为68.42%、71.44%;50 g/L双氟磺草胺SC 7.50 g/hm^2+40%唑草酮WG 15.00 g/hm^2+200 g/L氯氟吡氧乙酸异辛酯EC 120.00 g/hm^2对荠菜的防效最佳,株防效为80.69%,鲜质量防效为85.92%。29%氯氟吡氧乙酸异辛酯WP 111.31 g/hm^2+5%唑草酮WP3.31 g/hm^2对总草的防效最佳,株防效为82.80%,鲜质量防效为89.49%;50 g/L双氟磺草胺SC7.50 g/hm^2+90%甲基碘磺隆钠盐TG 9.99 g/hm^2复配和200 g/L氯氟吡氧乙酸异辛酯EC 150.00 g/hm^2对总草的株防效分别为60.24%、47.31%,鲜质量防效分别为66.86%、53.92%,效果较差。总体来说,推荐使用29%氯氟吡氧乙酸异辛酯WP 111.31 g/hm^2+5%唑草酮WP 3.31 g/hm^2、50 g/L双氟磺草胺SC 7.50 g/hm^2+40%唑草酮WG 15.00 g/hm^2,不仅对小麦田播娘蒿、荠菜、猪殃殃均有较好的防效,而且对小麦安全。

Based on field trials,this study compared the control effects of 9 kinds of herbicides（ florasulam SC,carfentrazone-ethyl WG,fluroxypyr EC and so on） and mixtures on Descurainia sophia,Capsella bursa-pastoris and Galium aparine in wheat fields,to screen out herbicides with higher control effects.These herbicides and mixtures had no bad effect on the growth of wheat. At 28 days after spraying theseherbicides,29% fluroxypyr WP 111. 31 g / ha（ active ingredient,the same below） ＋ 5% carfentrazone-ethyl WP 3. 31 g / ha had the best control effect on Descurainia sophia and Galium aparine. The control effects on quantity and fresh weight of Descurainia sophia were both 100. 00%. The quantity and fresh weight control effects on Galium aparine were 68. 42% and 71. 44%. When the dose of 50 g / L florasulam SC ＋40% carfentrazone-ethyl WG ＋ 200 g / L fluroxypyr EC was 7. 50 g / ha ＋ 15. 00 g / ha ＋ 120. 00 g / ha,they had the best control effect on Capsella bursa-pastoris. The quantity and fresh weight control effects on Capsella bursa-pastoris were 80. 69% and 85. 92% respectively. In terms of all broad-leaved grasses,29% fluroxypyr WP 111. 31 g / ha ＋ 5% carfentrazone-ethyl WP 3. 31 g / ha had the best control effect.The control effects of quantity and fresh weight were 82. 80% and 89. 49%. When the doses of 50 g / L florasulam SC ＋ 90% iodosulfuron-methyl-sodium TG and 200 g / L fluroxypyr EC were 7. 50 g / ha ＋9. 99 g / ha and 150. 00 g / ha,respectively,they had low control effect on all broadleaf weeds. The control effects on quantity and fresh weight of all broad-leaved grasses were 60. 24%,47. 31% and 66. 86%,53. 92% separately on the 28 th day after application. We recommended 29% fluroxypyr WP 111. 31 g / ha ＋ 5%carfentrazone-ethyl WP 3. 31 g / ha,50 g / L florasulam SC 7. 50 g / ha ＋ 40% carfentrazone-ethyl WG 15. 00 g / ha,because their control effects on Descurainia sophia,Capsella bursa-pastoris and Galium aparine were excellent,and they were safe to wheat.