90%盖萨林防除春玉米田杂草效果评价

1999~2000年进行了90%盖萨林水分散颗粒剂(WG)防除春玉米田杂草的效果及对春玉米的安全性田间小区试验。结果表明,90%盖萨林WG对春玉米田的藜、本氏蓼、反枝苋、龙葵等阔叶杂草有良好的防除效果,而对苍耳、苘麻及禾本科杂草防效较差。春玉米播后苗前土壤处理,适宜的用药量为90%盖萨林1620~1890(g·ai)/hm2(有效成份用量),对阔叶杂草总的株数和鲜重防效均在90%以上,在上述推荐剂量范围内对春玉米安全。

Evaluation on Effect of Gesaprin on Controlling Weeds in Spring Corn Field

The field trial on the effect of Gesaprin on controlling weeds and the safety to corn in spring corn fields was conducted during 1999~2000. The results showed that 90%gesaprinWP could control effectively broadleaf weeds in spring cornfield, such as Bacon weed (Chenopodium album L.), Willow leaf knotweed (Polygonum bungeanum Turcz.), Redroot pigweed (Amaranthus retroflexus L.) and Black nightshade (Solanum nigrum L.). But the control effects of Gesaprin to Heartleaf cocklebur (Xanthium strumarium L.), Velvetleaf (Abutilon theophrasti Medic.) and the grass family were poorer. The control effects of weed plant and weed fresh weight were over 90%. The optimum application timing was in after planting and pre-germination. The suitable dosage was 90% Gesaprin WG 1620~1890(g·ai)/hm2. These dosages were safe to spring corn.