灭草松对甘薯的安全性及除草生物活性测定

通过茎叶喷雾法进行了灭草松防除甘薯田阔叶杂草试验。结果表明,灭草松防除阔叶杂草反枝苋、马齿苋及碎米莎草等甘薯田具有代表性杂草有很好的除草效果,施药后40 d株数防效为80.12%～93.67%,鲜重防效为74.69%～92.95%;对甘薯安全性较好,施药后甘薯叶片有不规则触杀型药害斑,15 d后新生叶片生长正常,施药后40 d苗期蔓长及蔓鲜重与人工除草无显著性差异;甘薯收获时测产结果表明,灭草松防除甘薯田阔叶杂草对甘薯安全,除草增产效果显著。

Herbicidal Activity and Safety to Sweet Potato of Bentazone

The experiments were conducted to appraise the broad weed control of bentazone. The results showed that the number and fresh weight control effect to Amaranthus retroflexus, Portulaca oleracea and Cyperus iria were 80.12%-93.67% and 74.69%-92.95% respectively 40 days after treatment. Sweet potato appeared phytotoxicity symptom, and the newly-developed leaves grow normally 15 days after treatment. There was no significant difference of sweet potato vine length and fresh weight among treatments of different bentazone doses and hand weeding 40 days after treatment. Overall, bentazone is safe and can increase significantly production to sweet potato.