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双唑草腈对双季水稻田杂草的防效及后茬作物的影响

作  者:
张月;贾浩然;李卫;李保同;石绪根;汤丽梅
单  位:
江西农业大学国土资源与环境学院
关键词:
双唑草腈;苄嘧磺隆;五氟磺草胺;扑草净;水稻;防效;后茬作物
摘  要:
通过大田试验测定了双唑草腈及其与苄嘧磺隆、五氟磺草胺和扑草净混用对双季水稻田杂草的防效,并评价了双唑草腈对水稻及后茬作物的安全性。结果表明:2%双唑草腈GR对双季水稻田杂草具有良好的防治效果,210、315和420 g/hm~2处理药后30、45 d对禾本科杂草和阔叶类杂草的防效均在87%以上,低剂量140 g/hm~2处理药后30、45 d对双季水稻田禾本科杂草和阔叶类杂草防效均在75%以上。2%双唑草腈GR 140、210、315和420 g/hm~2处理对后茬作物小白菜、马铃薯、小麦、紫云英和冬季油菜生长安全。2%双唑草腈GR以140、210 g/hm~2分别与苄嘧磺隆或五氟磺草胺混用,药后30、45 d对禾本科杂草和阔叶杂草的防效均在93%以上,显著优于2%双唑草腈GR相应浓度的单剂处理,其中2%双唑草腈GR 210 g/hm~2+10%苄嘧磺隆WP 30 g/hm~2混用可以达到2%双唑草腈GR 315 g/hm~2处理的防治效果,且对水稻生长安全;单独施用50%扑草净WP 450 g/hm~2对双季稻田禾本科杂草的防效较差,其与2%双唑草腈GR混用后防效显著提高,但对水稻生长有较强的抑制作用。综上,双唑草腈及其与苄嘧磺隆、五氟磺草胺混用对双季水稻安全,可在双季水稻田推广应用。
译  名:
Efficacy of pyraclonil on weeds in double-season rice fields and the effects on following crops
作  者:
ZHANG Yue;JIA Haoran;LI Wei;LI Baotong;SHI Xugen;TANG Limei;College of Land Resources and Environment, Jiangxi Agricultural University;
关键词:
pyraclonil;;bensulfuron-methyl;;penoxsulam;;prometryn;;rice;;efficacy;;following crop
摘  要:
The efficacies of pyraclonil 2% GR and its mixture with bensulfuron-methyl, penoxsulam and prometryn on weeds in the fields of double-season rice were tested, and the safety of pyraclonil on rice and following crops were evaluated. The results showed that pyraclonil 2% GR has a good control effect on weeds in double-season rice fields, with the efficacies above 87% at the dosage of 210, 315, and 420 g/hm~2 30 and 45 days post treatment. The treatment with low-dose of 140 g/hm~2 had more than 75% control effects on grass weeds and broad-leaved weeds 30 and 45 days later. The treatments with pyraclonil 2% GR 140, 210, 315 and 420 g/hm~2 were safe for the growth of following crops, including pakchoi, potato, wheat, milk vetch and winter rape. The mixtures of 140 g/hm~2 and 210 g/hm~(2 )pyraclonil 2% GR with bensulfuron-methyl or penoxsulam showed an efficacy of above 93% against grass weeds and broad-leaved weeds 30 and 45 days post treatment, which were significantly better than that of pyraclonil 2% GR treated alone at 140 g/hm~2, 210 g/hm~2. In addition, pyraclonil 2% GR 210 g/hm~2 + bensulfuron-methyl 10% WP 30 g/hm~2 can achieve the effect of pyraclonil 2% GR 315 g/hm~2, and it is safe for rice growth. The application of prometryn 50% WP 450 g/hm~2 alone had a poor control effect on the grass weeds in the double cropping paddy field. The control effect of prometryn 50% WP was significantly improved when mixed with pyraclonil 2% GR, but showed a strong inhibitory effect on rice growth. Therefore, pyraclonil and its mixture with both bensulfuron-methyl and penoxsulam have an excellent application prospect in the field of double-season rice.

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