不同除草剂对遍地黄金草坪杂草的控制效果及安全性

为了筛选出可用于防除遍地黄金草坪杂草的除草剂配方，经室内盆栽法测定不同除草剂茎叶处理对马唐、香附子、红花酢浆草的抑制效果及对遍地黄金的安全性后，进行药剂的田间试验，结果表明：25%啶嘧磺隆WG对总草的株防效和鲜重防效分别达到78.1%和80.5%,显著高于其他单剂处理的防效；56%2甲4氯钠盐SP对阔叶杂草的株防效和鲜重防效分别为85.4%和85.7%,高于其他单剂处理的防效；108 g/L高效氟吡甲禾灵EC对禾本科杂草的株防效和鲜重防效可达92.2%和92.6%,显著高于其他各处理的防效；108 g/L高效氟吡甲禾灵EC+56%2甲4氯钠盐SP混剂对禾本科杂草的株防效和鲜重防效分别为88.2%和91.1%,对阔叶杂草的株防效和鲜重防效分别为75.3%和78.2%,但对莎草科杂草的防效低；108 g/L高效氟吡甲禾灵EC+75%氯吡嘧磺隆WG混剂对禾本科杂草的株防效和鲜重防效较好，分别可达到85.4%和87.4%,对莎草科杂草的株防效和鲜重防效分别为71.9%和77.6%,但对阔叶杂草防效较低；56%2甲4氯钠盐SP+75%氯吡嘧磺隆WG混剂对阔叶杂草的株防效和鲜重防效分别可达到85....

Control effects of different herbicides to weeds and their safety in Arachis pintoi field

In order to screen out the herbicide for weeds control in Arachis pintoi field, the effects of different herbicides sprayed on the stem and leaf treatments of Digitaria sanguinalis, Cyperus rotundus and Oxalis corymbosa were investigated and their safety to A.pintoi were evaluated in greenhouse. The results showed that the control efficacies of plant number and fresh weight of total weeds with flazasulfuron 25% WG were 78.1% and 80.5%, significantly higher than those of other single agent treatments. The control efficacies of MCPA-sodium 56% SP on broadleaved weeds were 85.4% and 85.7%, higher than those of other single agent treatments. The efficacies of haloxyfop-P-metyl 108 g/L EC against gramineous weeds were 92.2% and 92.6% respectively, significantly higher than that of other treatments. The plant number and fresh weight control efficacies of haloxyfop-P-metyl 108 g/L EC+MCPA-sodium 56% SP mixture were 88.2% and 91.1% on graminesus weeds, 75.3% and 78.2% on broadleaved weeds, respectively, but its efficacies on cyperaceae weeds were low. The efficacies of haloxyfop-P-metyl 108 g/ EC + halosulfuron-methyl 75% WG mixture on gramineous weeds were 85.4% and 87.4%, and were 71.9% and 77.6% on cyperaceae weeds, respectively, while the efficacies on broadleaved weeds were only 54.5% and 58.4%. The control efficacies of plant number and fresh weight of broadleaved weeds with MCPA-sodium 56% SP + halosulfuron methyl 75% WG mixture were 85.5% and 90.3% and were 92.1% and 96.4% on cyperaceae weeds, respectively, significantly higher than those of other treatments, while the efficacies on gramineous weeds were only 16.4% and 20.5%. The control efficacies of plant number and fresh weight of gramineous weeds with flazasulfuron 25% WG+ haloxyfop-P-metyl 108 g/L EC were 89.5% and 93.1%, 85.5% and 90.8% on broadleaved weeds, and 90.5% and 92.5% on cyperaceae weeds, respectively. The effect of these treatments is better than that of other treatments, which can be popularized in production. The above results indicated that haloxyfop-P-metyl 108 g/L EC can be applied if there are a large number of gramineous weeds in the lawn. If both gramineous weeds and other broadleaved weeds are serious, it is better to use a mixture of haloxyfop-P-metyl 108 g/L EC+ MCPA-sodium 56% SP to control weeds. When gramineous weeds and cyperaceae weeds are serious, the control of weeds could be achieved by using a mixture of haloxyfop-P-metyl 108 g/L EC+ halosulfuron-methyl 75% WG.