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田志慧, 沈国辉*.4种芽前除草剂防除直播小白菜田杂草的效果及其安全性[J].植物保护,2016,42(6):197-201.

4种芽前除草剂防除直播小白菜田杂草的效果及其安全性

Control effect and safety of four pre-emergence treatment herbicides on weeds in direct seeding Brassica chinensis field

投稿时间：2015-12-25 修订日期：2016-02-18

DOI：

中文关键词: 小白菜芽前除草剂除草效果安全性

英文关键词:Brassica chinensis preemergence treatment herbicides weeds control efficacy safety

基金项目:上海市绿叶蔬菜产业技术体系杂草专项

作者	单位
田志慧, 沈国辉*	上海市农业科学院生态环境保护研究所, 上海市设施园艺技术重点实验室, 上海 201403

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中文摘要:

采用田间试验方法研究了33%二甲戊灵乳油、96%精异丙甲草胺乳油、50%敌草胺水分散粒剂和90%禾草丹乳油4种芽前除草剂防除直播小白菜田杂草效果及其安全性, 筛选出了适于直播小白菜田的芽前除草剂。结果表明, 药后35 d, 33%二甲戊灵乳油有效用量371.25~742.5 g/hm2、96%精异丙甲草胺乳油 864~1 080 g/hm2和90%禾草丹乳油1 687.5~2 025 g/hm2处理无论是总草株防效还是鲜重防效均在94.27%以上, 其次是50%敌草胺水分散粒剂750~1 500 g/hm2处理, 防效为85.62%~90.54%。33%二甲戊灵乳油各供试剂量虽对小白菜的出苗没有影响, 但对小白菜的生长有一定影响, 表现为地上部株高和鲜重受抑制; 其他3个供试除草剂各剂量处理对小白菜出苗和生长安全。从除草效果和安全性两方面综合考虑, 推荐96%精异丙甲草胺乳油864~1 080 g/hm2和90%禾草丹乳油1 687.5~2 025 g/hm2用于小白菜田芽前防除杂草。

英文摘要:

Control effect and safety of 33% pendimethalin EC, 96% S-metolachlor EC, 50% napropamide WG and 90% thiobencarb EC on weeds in direct seeding Brassica chinensis field were investigated by the field experiment, and pre-emergence treatment herbicides suitable for direct seeding B. chinensis field were also selected. The results indicated that the control efficacy of 33% pendimethalin EC 371.25-742.5 g/hm2, 96% S-metolachlor EC 864-1 080 g/hm2 and 90% thiobencarb EC 1 687.5-2 025 g/hm2 on plant height and fresh weight were all above 94.27%. And the control effect of 50% napropamide WG 750-1 500 g/hm2 was 85.62%-90.54%. All of the tested dosage of 33% pendimethalin EC had no influence upon emergence of B. chinensis, but had some inhibition upon the height and fresh weight of B.chinensis. The other three pre-emergence treatment herbicides were safe to emergence and growth of B.chinensis. Considering the control effect and safety, 96% S-metolachlor EC 864-1 080 g/hm2 and 90% thiobencarb EC 1 687.5-2 025 g/hm2 could be recommended as pre-emergence treatment herbicides in direct seeding B. chinensis field.

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