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首页> 外文期刊>African Crop Science Journal >EFFICACY OF SOME SYNTHETIC INSECTICIDES FOR CONTROL OF COTTON BOLLWORMS IN NORTHERN GHANA
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EFFICACY OF SOME SYNTHETIC INSECTICIDES FOR CONTROL OF COTTON BOLLWORMS IN NORTHERN GHANA

机译：几种合成杀虫剂对加纳北部棉铃虫的防治效果

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摘要

Lepidopteran bollworms are a major constraint to increased and sustainable production of cotton in the savanna ecology of Ghana. Studies were conducted at the Experimental Farms of the University for Development Studies, Nyankpala in northern Ghana, during the 2009 cropping season to evaluate the effects of three commonly used insecticide formulations, namely, Betsulfan and Endosulfan (each at 3.2,3.5 and 3.91 ha~(-1)), and Thionex (at 2.3, 2.5 and 2.81 ha~(-1)), on the population density and damageincidence of the bollworm complex, and their effects on the yield of cotton. The incidence and abundance of bollworms were significantly (P < 0.05) affected by the different insecticide treatments. Bollworm infestation in all treated plots was significantly reduced. Among the insecticide treatments, Thionex at 2.8 1 ha~(-1) was the most effective. This was followed by that of Betsulfan at 3.9 1 ha~(-1), Betsulfan or Endosulfan (each at 3.21 ha~(-1)) recorded the highest infestation. Lint seed yield of cotton also increased significantly with increased concentrations of the insecticides, Thionex at 2.81 ha~(-1) and Betsulfan at 3.2 1 ha~(-1) recorded the highest and lowest yields, respectively. For effective control of cotton bollworms for maximum yieldin the ecology, Thionex applied at 2.8 1 ha~(-1) is recommended.
机译：鳞翅目棉铃虫是加纳热带稀树草原生态系统中棉花增加和可持续生产的主要制约因素。在2009年农作季节期间，在加纳北部Nyankpala的发展研究大学实验农场进行了研究，以评估三种常用杀虫剂配方（杀虫硫丹和硫丹）的作用（每种杀虫剂分别为3.2、3.5和3.91公顷〜 （-1））和Thionex（分别在2.3、2.5和2.81 ha〜（-1）处）对棉铃虫复合体的种群密度和危害发生率及其对棉花产量的影响。不同杀虫剂处理对棉铃虫的发生率和丰度有显着影响（P <0.05）。在所有处理过的地块中，棉铃虫的侵扰都大大减少了。在杀虫剂处理中，Thionex在2.8 1 ha〜（-1）时最为有效。其次是在3.9 1 ha〜（-1）的Betsulfan，Betsulfan或Endosulfan（分别在3.21 ha〜（-1））的侵染量最高。棉花的棉绒种子产量也随着杀虫剂浓度的增加而显着增加，Thionex在2.81 ha〜（-1）和Betsulfan在3.2 1 ha〜（-1）分别记录了最高和最低产量。为了有效控制棉铃虫，以最大程度地提高生态效率，建议在2.8 1 ha〜（-1）下施用Thionex。

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