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以33%二甲戊灵乳油为试材,研究了其对甘蓝田杂草的防除效果及适宜剂量,以期为药剂推广应用提供参考依据。结果表明:33%二甲戊灵乳油施用后,对甘蓝无显著药害症状,能很好地防除甘蓝田禾本科杂草和阔叶杂草,33%二甲戊灵乳油有效成份618.8~742.5g/hm2,推荐剂量内对禾本科杂草稗草的株数防效为80.5%~84.7%,鲜重防效为88.1%~91.6%,对阔叶杂草的株数防效为89.6%~94.3%,鲜重防效为93.5%~96.8%。对禾本科杂草和阔叶杂草均表现为鲜重防效高于株数防效。
With 33% pendimethalin as test material, we studied its control effects on weeds in Brassica oleracea and its appropriate dosage, in order to provide a reference for the popularization and application of medicaments. The results showed that 33% pendimethalin EC had no obvious phytotoxicity on cabbage, and could well control weeds and broadleaf weeds in cabbage field. The effective content of 33% pendimethalin EC was 618.8 ~ 742.5 g / hm2, the control effect of the recommended dose on the number of weedy barnyardgrass was 80.5% -84.7%, the fresh weight control effect was 88.1% -91.6%, and the control effect on broadleaf weeds was 89.6% -94.3 %, Fresh weight control effect 93.5% ~ 96.8%. Grasses and broad-leaved weeds showed fresh weight control effect is higher than the number of plants.