[目的]为减少石蒜出苗后田间管理劳动力投入,对规模化种植的石蒜进行苗后杂草防除.[方法]基于前期田间杂草调查,采用2.5％五氟磺草胺OD(22.5 g a.i./hm2)、50％2,4-滴异辛酯EC(900 g a.i./hm2)、20％氯氟吡氧乙酸EC(180 g a.i./hm2)、20％硝磺草酮 SC(180 g a.i./hm2)、56％2 甲 4氯钠盐 WP(1056 g a.i./hm2)5 种不同类型的茎叶除草剂,开展对石蒜杂草的防除研究,筛选高效、安全、广谱的除草剂.[结果]施药后30d,20％硝磺草酮SC在相对株防效(95.10％)和绝对株防效(97.18％)上都是最佳的,且杀草谱广,鲜质量防效可达到78.30％,在对石蒜的药害程度方面20％硝磺草酮SC也未表现出药害.[结论]因此建议针对石蒜大规模种植出现的田间杂草,选用20％硝磺草酮SC有效剂量180 g a.i./hm2防效最佳.
Screening and safety evaluation of herbicides in Lycoris radiata field
[Aims]In order to reduce the labor input in field management after the seeding emergence and control weeds in large-scale planting of Lycoris radiata.[Methods]Based on the previous field weed survey,five foliar-applied herbicides of different types were adopted in L.radiata fields,including penoxsulam 2.5％ OD(22.5 g a.i./ha),2,4-D-ethylhexyl 50％ EC(900 g a.i./ha),fluroxypyr 20％ EC(180 g a.i./ha),mesotrione 20％ SC(180 g a.i./ha)and MCPA-sodium 56％ WP(1056 g a.i./ha),to screen efficient,safe and broad-spectrum herbicides.[Results]On day 30 after application,mesotrione 20％ SC showed the best relative plant control effect(95.10％ )and absolute plant control effect(97.18％ ),with wide herbicidal spectrum and fresh weight control efficacy of 78.30％ .More importantly,it did not show any harm to L.radiata.[Conclusions]It is suggested to use mesotrione 20％ SC to control weeds in large-scale L.radiate fields,with a recommended dosage of 180 g a.i./ha.
万方数据
维普
