几种茎叶处理除草剂防除棉田龙葵的研究

【目的】龙葵是新疆棉田近年来主要危害杂草之一,筛选高效防治药剂对控制其危害。【方法】采用大田随机区组设计,对8种新疆大田常用茎叶处理除草剂对龙葵进行田间药效试验。【结果】灭草松、扑草净和草甘膦对龙葵的防效最佳,施药后第1 d灭草松的防效达52.65%显著高于其他处理组,灭草松和扑草净在药后5 d的防效可达到100%,而草甘膦和氯氟吡氧乙酸药后9 d对龙葵也能达到100%的防治效果,其对龙葵的生物量抑制效果均在70%以上;三氟啶磺隆和苯磺隆的药效较好(在第9 d防效>85%),但药效缓慢。【结论】杂草危害不重时可喷施三氟啶磺隆钠盐进行防治,而灭草松、草甘膦、扑草净和氯氟吡氧乙酸可作为应急防治棉田杂草龙葵的除草剂。

A Study of Eight Foliar Herbicides to Control Solanum nigrumL.in Cotton Field

【Objecitive】 Solanum nigrum L.is a kind of important weeds in cotton field found in recent years and it is really important to screen effectively herbicides to prevent and control this kind of weed.【Method】Field randomized block design was conducted to evaluate the control efficacy and biomass inhibition of 8 foliar-applied herbicides which were commonly used in cotton field in Xinjiang to control Solanum nigrum L..【Result】Results showed that bentazone,prometryn and glyphosate have better control effects on Solanum nigrum L.,and the efficacy of bentazone reached 52.65% at 1 days after treatment;the efficacy of bentazone and prometryn reached 100% at 5 days after treatment,while glyphosate and fluroxypyr achieved the same efficacy at 9 days after treatment and the biomass inhibition were all more than 70% at 9 days after treatment.Trifloxysulfuron and tribenuron-methyl have good efficacy(>85%) at 9 days after treatment.【Conclusion】Trifloxysulfuron can be sprayed for preventing and controlling Solanum nigrum L.when the dangers of it are not serious.Bentazone,prometryn,glyphosate and fluroxypyr are good herbicides for controlling Solanum nigrum L.in cotton field.