扑草净防除马铃薯田杂草药效试验

试验结果表明 ,5 0 %扑草净防除马铃薯田杂草 ,在用药量 0 .5～ 1.0kg/hm2 范围内 ,对马铃薯的生长发育影响较小 ,可有效地防除马唐、狗尾草、稗草、反枝苋、藜等一年生杂草。施药后 15d ,株防效为 97.7%～ 98.6 % ;施药后 4 5d ,株防效 88.8%～ 97.0 % ,鲜重防效 80 .6 %～ 92 .0 %。增产效果为 10 .3%～ 15 .2 %。最佳用药量以 0 .7kg/hm2 为宜 ,施药适期以杂草 2～ 4叶期为好

Pesticide Effect Trial to Control of the Weeds in Potato Fields with Prometryne

The result for two years trial proves that 50% Prometryne prevents and gets rid of the weeds in potato fields. Within the Scope of using pesticide 0.5～1.0kg/hm 2,it affects a little for the growth of the potatoes and it can prevent and get rid of the annual weeds like Digitaria sanguinal, Setaria viridis, Echinochloa crusgali,Amaranthus retroflexus,Chenopdium album and so on.In 15 days after using pesticide,the preventing effect is 97.7%～98.6% for each plant.In 45 days after using pesticide,the preventing effect is 88.8%～97% for each plant.Fresh and heavy effect is 80.6%～92%.The effect of increasing production is 10.3%～15.2%.It's better to use pesticide 0.7kg/hm 2 and it's better to use pesticide when the weed has 2～4 leaves.