摘要
１９９４年对直播稻田进行了药剂除草研究。结果表明：播前用５％丁草胺颗粒剂１公斤／６６６．７米２，播后再用１Ｏ％苄嘧黄隆可湿性粉剂１５克／６６６．７米￣２处理，对稗草、阔叶草及总体杂草株防效分别为９４．６％、８７．３％、９２．３％；钿重防效分别达９９．４％、９２．８％、９９．３％。播后５天单用苄嘧黄隆１５克／６６６．７米￣２，对稗草、阔叶草、总体杂草株防效分别为８Ｏ，４％、６９．４％、７７，４％；鲜重防效分别达９６．０％、７５．７％、９５．７％；在播后１５天再喷施１次５Ｏ％二氯喹啉酸可湿性粉剂２Ｏ克／６６６．７米￣２，或９６％草达灭乳油１ＯＯ毫升／６６６．７米￣２，或在掐后１５天苄嘧黄隆与二氯喹啉的直接混用，对稗草株防效比单用苄嘧黄隆分别提高８．４％、１６。８％、６．４％。１７．２％哌草丹－苄嘧黄隆可湿性粉剂２ＯＯ克／６６６．７米￣２，３Ｏ％丙草胺轧油１００毫升／６６６．７米￣２，对稗草、阔叶草、总体杂草株防过分别为９１．６％、９２．４％、７５．５％、５９．４％、８６．１％，８Ｏ．１％；鲜重防效分别达９９．２％、９８．８％、８６．７％、６８．２％、９８．９％、９７．９％。上述药剂处理，除草效果好，对立播稻安全?
In 1994, fof herbicides to control weeds in directsowing rice fieldswas studied,the results showed that theplants and fresh weight of weeds treated with 5%G butachlorlkg/666. 7m￣2 before sowing and 10%WP bensulfuron methyl15g/666. 7m￣2 after it again reduced 92.3%and 99.3%,andbarnyardgrass, broadleaf weeds did 94.6%and 99.4%;87.3%and 92.8%,respectively. And treated with the bensul-furon methyl l5g/666. 6m￣2 in five dags sowing,they reduced77.4%and 95.7%,and barnyardgrass, broadleaf weeds did80.4%and 96.6%;69.4%and 75.7%,respectively. The ben-sulfuron methyl combined with 50%WP quinclorac 20g/666.7m￣2,or 96%EC molinate l00ml/666. 7m￣2,the herbicdaleffectiveness against barnyardgrass plants increased obvious-ly.The new herbicides l 7.2%WP mixture of dimepiperateand bensulfuron methyl 200g/666.7m￣2, 30%EC pretilachor100m1/666.7m￣2,applied in five dag sowing. their effect againstbarnyardgrass, broadleaf and all weed plants and fresh weightwere 91.6%,92.4%and 99.2%,98.8%;75.5%,59.4%and 86.7%,68.2%;86.1%,80.1%and 98.9%,97.9%;respectively.Applied in direct sowing rice fields,these herbicldes aregood,and safe,and may be applied in demonstrations.
出处
《农药》
CAS
北大核心
1995年第4期43-45,共3页
Agrochemicals
关键词
直播稻田
除草剂
杂草
水稻
direct sowing rice fields,herbicides,weed con-trol.
