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作 者:李静波[1,2,3] 张蕾[1] 郑伟[1,2] 刘秀[1,2] 金晨钟[1,2,3]
机构地区:[1]湖南人文科技学院农业与生物技术学院,湖南娄底417000 [2]农田杂草防控技术与应用协同创新中心,湖南娄底417000 [3]娄底市农业科学研究所,湖南娄底417000
出 处:《湖南农业科学(下半月)》2014年第11期37-39,共3页
基 金:湖南省高校产业化培育项目(13CY030);湖南人文科技学院产学研合作引导项目(2013CXY04);湖南人文科技学院农药无害化应用省重点实验室开放基金项目(13K116)
摘 要:采用毒土法和喷雾法研究了不同剂型和用量NC-620和稻杰对水稻田稗草、千金子和三棱草的田间防除效果。结果表明,对稗草的株防效从高到低分别是2.5%稻杰、NC-620(4%TB)、有效成分为(下同)100 g/hm2NC-620(33%WG)和80 g/hm2NC-620(33%WG)。NC-620对千金子有一定的防效,防效从高到低是NC-620(4%TB)、100 g/hm2NC-620(33%WG)和80 g/hm2NC-620(33%WG),2.5%稻杰对千金子无防效。三棱草与稗草的株防效基本相同,2.5%稻杰在防除效果上较NC-620好,45 d后防效高达90%以上。稗草、千金子和三棱草鲜重防效与株防效的结果基本相同。To determine the herbicidal effect of different dosages and formations of metazosulfuron (NC-620) on barnyardgrass (Echinochloa crucrusgalli (L.) Beauv ) , Asian sprangletop (Leptochloa chinensis (L.) Nees) and Rhizomain sparganii weed (Scirpus planiculunis Fr. schunidt) in rice field, field experiment was conducted through method of pesticide-clay mixture and spray. Plant control effects on barnyard grass were 2.5% penoxsulam〉 metazosulfuron (4%TB) 〉 100 g a.i./hm/ metazosulfuron (33%WG) 〉 80 g a.i./hm2 metazosulfuron (33%WG) . NC-620 conferred a certain plant control effect on Asian sprangletop. Plant control effects on Asian sprangletop were metazosulfuron (4%TB) 〉 100 g a.i./hm2 metazosulfuron (33%WG) 〉 80 g a.i./hm2 metazosulfuron (33%WG) individually, though 2.5% penoxsulam had no plant control effect on Asian sprangletop. Plant control effect on Rhizomain sparganii was similar to that on bamyardgrass. 2.5% penoxsulam control effect was more than 90% after 45 d, better than NC-620. Results on control effect in fresh weight showed the same trend with those on plant control effect.
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