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首页> 外文期刊>Quality Assurance and Safety of Crops & Foods >Efficacy of herbicides in controlling Parthenium hysterophorus L. in spring maize (Zea mays L.)
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Efficacy of herbicides in controlling Parthenium hysterophorus L. in spring maize (Zea mays L.)

机译：除草剂在控制光的效果英在春天l .玉米(玉米l .)

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摘要

Parthenium hysterophorus L. is a noxious annual weed rapidly spreading in cropped areas of the irrigated Punjab and other parts of Pakistan. It has become a major threat to grazing lands and crops in Punjab province. The main objective of this study was to explore the efficacy of different herbicides with various concentrations viz. pendimethalin, S-metolachlor + atrazine, bromoxynil + 2-methyl-4-chloorphenoxyacetic acid, and atrazine at their recommended (407, 711, 445 and 469 g a.i./ha, respectively), 50% lower and 50% higher doses against Parthenium hysterophorus L. Weeds were allowed to grow in a field for three years (2010-2013) where this spring maize experiment was conducted during the years 2013 and 2014. All herbicide treatments at their recommended and higher doses significantly reduced Parthenium dry weight. Minimum density (2.3 and 2.0/m) and dry biomass (39.74 and 43.47 g/m) of parthenium weed was observed with S-metolachlor + atrazine at 711.36 g/ha treatment during 2013 and 2014, respectively. A herbicide efficiency index of 88% was observed with S-metolachlor + atrazine at 711.36 g a.i./ha in 2013 and 2014, respectively. Among the herbicides, atrazine, bromoxynil and metolachlor gave significantly the lowest dry weight of Parthenium. Maximum 1000-grain weight (259 and 260.67 g), grain yield (4.86 and 4.87 t/ha), stalk yield (5.60 and 5.42 t/ha) and biological yield (14.80 and 13.80 t/ha) were recorded during both years of experiments when S-metolachlor + atrazine at 711.36 g/ha was applied. These results suggested that over-and underdose of S-metolachlor + atrazine significantly lower the maize growth and yield attributes by allowing more Parthenium density at a lower dose, while causing a toxic effect on the maize plants at a higher dose of herbicides. So, the application of S-metolachlor + atrazine (post-emergence) at the recommended rate minimised the weedcrop competition at all the critical crop growth stages, and ultimately yielded the better crop harvest during both years of study.
机译：光英l是一个有毒的年度杂草在裁剪的地区迅速蔓延灌溉巴基斯坦旁遮普和其他地区。牧场和已成为一个主要的威胁在旁遮普省作物。本研究旨在探讨的功效不同与不同浓度除草剂viz. pendimethalin S-metolachlor +莠去津,溴苯腈+ 2-methyl-4-chloorphenoxyacetic酸,和阿特拉津推荐(407、711、445和人工智能469克/公顷),和低50%针对光英剂量高出50%l .杂草被允许在一个字段三年(2010 - 2013)在今年春季玉米实验是在2013年进行的和2014年。推荐和高剂量显著减少光干重。(2.3和2.0 /米)和干重(39.74和43.47g / m)观察光的杂草S-metolachlor +莠去津在711.36克/公顷治疗分别在2013年和2014年。观察效率指数的88%S-metolachlor +莠去津在711.36 g人工智能/公顷2013年和2014年,分别。除草剂阿特拉津、溴苯腈和metolachlor了显著的最低干重光。260.67 g),粮食产量(4.86和4.87吨/公顷)茎产量(5.60和5.42吨/公顷)和生物收益率(14.80和13.80吨/公顷)记录中当S-metolachlor +两年的实验阿特拉津在711.36克/公顷。结果表明,过去不足剂时S-metolachlor +莠去津显著降低玉米生长发育和产量属性允许低剂量的光密度,而导致对玉米植株的毒性影响高剂量的除草剂。S-metolachlor +莠去津(萌发后)推荐率最小化weedcrop竞争在所有关键作物生长阶段,并最终取得了更好的作物在两年的学习收获。

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