摘要
试验结果表明 ,新型除草剂拜田净对移栽稻田和直播稻田杂草均具有良好的防除效果 ,以10 0～ 150ga .i./hm2 的用量在稗草 1.5～ 2 .5叶期施药 ,除草效果稳定在 89.6%以上 ,持效期为 4 0d ,与扫特和绕地奥相当 ,且优于二氯喹啉酸。拜田净的杀草谱包括稗草、千金子、异型莎草、陌上菜、鸭舌草 ,防效随剂量提高而增加 ,并且 1.5叶期施药的除草效果比 2 .5叶期施药的好。拜田净以喷雾法和毒土法施用均有较好的防效。直播稻田喷雾时要求田间土表湿润 ,药后 1d灌入薄水层 ;移栽稻田毒土撒施时要求田面保持水层 3cm ,药后保水 5～ 7d。同时 ,拜田净对水稻安全 ,但高剂量 ( 2 0 0～ 2 50ga .i./hm2 )下对 1.
Trials showed that fentrazamide is highly effective on weeds in seedling transplanted and direct seeded rice fields.Control efficacy of more than 89.6% and persistence of 40 d were obtained when fentrazamide was applied at a dosage of 100～150 g a.i./hm 2 during 1.5～2.5 leaf stage of barnyardgrass.The effect of fentrazmide on the weeds is similar to Sofit(pretilachlor+renclorim) and Lodeo (butachlor),and much better than quinclorac.The weeds that are controlled include Echinochloa crusgalli,Leptochloa chinensis,Cyperus difformis,Lindernia procumbens,Monochoria vaginalis. Control efficacy of the herbicide is better when applied in 1.5 leaf stage of barnyardgrass than in 2.5 leaf satge,and increases with the raise of fentrazamide dosage,but no difference between spraying and broadcasting with soil.Besides,fentrazamide is safe to rice,while used at the dosage of 200～250 g a.i./hm 2 it has a little phytotoxicity to direct seeded rice at 1.5 leaf.
出处
《浙江农业学报》
CSCD
2000年第6期345-348,共4页
Acta Agriculturae Zhejiangensis
基金
浙江省"九五"重大科技项目(961102242)
德国拜耳公司资助项目(1998-1999)
关键词
拜田净
直播稻
移栽稻
杂草
应用技术
fentrazamide
YRC-2388
direct seeded rice
seedling transplanted rice
weeds
application technique
