箭筈豌豆繁种田阔叶杂草藜防除技术研究

Control technology of broadleaf weed Chenopodium album in Vicia sativa breeding field

为构建适用于箭筈豌豆繁种田阔叶杂草藜的防治技术,本研究通过田间试验测定评价了地膜覆盖对箭筈豌豆繁种田阔叶杂草防效以及筛选对箭筈豌豆安全且对藜防效高的除草剂。结果表明,覆盖黑色地膜对藜的株防效为81.52%,覆盖白色地膜的株防效为66.30%。播后苗前土壤封闭处理中330 g/L二甲戊灵EC,33%精异草·丙炔氟SC,480 g/L嗪草酮SC的防效差异不显著。80%唑嘧磺草胺WG 75 g/hm^(2)兑水900 L/hm^(2)播后6 d土壤封闭喷雾对阔叶杂草防效均在90%以上,对藜防效均在95%以上。50%扑草净WP苗期茎叶喷雾的推荐剂量为2450 g/hm^(2),对阔叶杂草防效87.85%~95.70%,对藜防效90.00%~96.50%。使用黑色地膜覆盖防除杂草,播后苗前(播后第6天)80%唑嘧磺草胺WG兑水剂量900 L/hm^(2)土壤封闭喷雾,苗期采用推荐选择剂量2450 g/hm^(2)50%扑草净WP茎叶喷雾,安全且防效较好。

The research aimed to clarify the control technology of broad-leaved weed Chenopodium album suitable for Vicia sativa breeding field.In this study,field experiments were conducted to determine the control effects of plastic film mulching on broadleaf weeds and C.album in V.sativa breeding fields and screen herbicides that are safe to V.sativa and have high control effects on C.album.The results showed that the control efficacy of black film mulching on C.album was 81.52%,while that of white film mulching was 66.30%.After sowing,the herbicides were used in the soil sealing treatment before seedling and the control effect of pendimethalin 330 g/L EC,S-metolachlor·flumioxazin 33%SC and metribuzin 480 g/L SC was not significantly different.The control efficacy of flumetsulam 80%WG soil-sealed spray 75 g/hm^(2) mixed with 900 L/hm^(2) water at the 6th day after sowing on broad-leaf weeds was more than 90%,and that on C.album was more than 95%.The recommended dosage of prometryn 50%WP in seedling stage was 2450 g/hm^(2),the control effect on broadleaf weeds was 87.85%-95.70%,and that on C.album was 90.00%-96.50%.Black film mulching cloud be used,flumetsulam 80%WG mixed with water at 900 L/hm^(2) could be sprayed on the sixth day after sowing,and prometryn 50%WP at the recommended dose of 2450 g/hm^(2) could be sprayed at seedling stage,which was safe and had good control effect.