徐 蓬1,2, 吴佳文3, 王红春2, 汪亚雄1,4, 田子华3, 娄远来1,2*.双唑草腈的除草活性及对水稻的安全性[J].植物保护,2017,43(5):198-204. |
双唑草腈的除草活性及对水稻的安全性 |
Herbicidal activity of pyraclonil to the weeds in rice fields and its safety to rice |
投稿时间:2016-11-01 修订日期:2017-02-04 |
DOI: |
中文关键词: 双唑草腈 水稻 除草活性 安全性 |
英文关键词:pyraclonil rice herbicidal activity safety |
基金项目:江苏省农业三新工程项目[SXGC(2015)293] |
作者 | 单位 | 徐 蓬1,2, 吴佳文3, 王红春2, 汪亚雄1,4, 田子华3, 娄远来1,2* | 1. 南京农业大学植物保护学院, 南京 210095 2. 江苏省农业科学院植物保护研究所, 南京 210014 3. 江苏省植物保护植物检疫站, 南京 210013 4. 南京农业大学生命科学学院, 南京 210095 |
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中文摘要: |
本文采用室内整株生测法测定了1.8%双唑草腈颗粒剂的除草活性及对不同水稻品种的安全性。在杂草出苗前、1叶期和2叶期以有效成分145.8 g/hm2的剂量撒施1.8%双唑草腈颗粒剂对水稻田常见杂草稗草、鸭舌草、耳叶水苋和异型莎草的鲜重抑制率均在92%以上,药后3 d杂草表现叶片干枯、黄化、僵苗等中毒症状,其见效速度明显快于对照药剂25 g/L五氟磺草胺油悬浮剂。在水稻播后苗前或1叶期施用,其在‘南粳9108’(粳稻)、‘K两优10’(杂交稻)和稗草间的选择性指数均大于4,对水稻安全。 |
英文摘要: |
The herbicidal activity and the safety of pyraclonil were determined through whole plant bioassay in greenhouse. Three days after treatment, the fresh weight of barnyardgrass [Echinochloa crusgalli (L.) Beauv.], monochoria [Monochoria vaginalis (Burm. f.) Kunth], sand ammannia (Ammannia arenaria H.B.K.), and smallflower umbrella (Cyperus difformis L.) were reduced more than 92% when treated by pyraclonil 1.8% granules at the dose of 145.8 g/hm2 at preemergence after sowing, one leaf stage, and two leaf stage. Pyraclonil caused a faster phototoxic effect than 25 g/L penoxulam OD. The selective index of pyraclonil used between rice [‘Nanjing 9108’ (Japonica rice), ‘K liangyou 10’ (Indica-hybrid rice)] and E. crusgalli (L.) Beauv. at preemergence after sowing or one leaf stage were greater than 4, suggesting that pyraclonil is safe to rice plants. |
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