The cocoa mirid (Hemiptera: Miridae) problem: evidence to support new recommendations on the timing of insecticide application on cocoa in Ghana
The cocoa mirid (Hemiptera: Miridae) problem: evidence to support new recommendations on the timing of insecticide application on cocoa in Ghana
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DOI：
10.1017/s1742758413000441
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发表时间：
2014-03-01
影响因子：
1.2
通讯作者：
Quarshie, Edward T. N.
中科院分区：
文献类型：
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作者：
Adu-Acheampong, Richard;Jiggins, Janice;Quarshie, Edward T. N.
根据20世纪50年代发布的建议，加纳政府的可可喷雾队每年8月至12月都会对大约200万公顷的可可作物进行黑荚病和盲蝽的防治，这是西非可可的主要害虫。一些可可种植者使用额外的杀虫剂。本文研究了两种重要盲蝽的时间分布，即茶盲蝽Distantiella theobroma（Dist.）和Sahlbergella singularis Hagl.，1991年、1999年、2003年和2012年，以确定在当前耕作制度中应用控制措施的适当时机。有一个显着的相关性之间的mirid丰富和豆荚的可用性，以及基芽和可可品种的增长。盲蝽的数量在1月至4月和9月至10月达到高峰。对农药使用、建议来源以及当前可可虫害处理的成功和失败进行的调查（访谈和重点小组讨论，涉及33个可可种植区的300多名农民）表明，1950年关于杀虫剂施用时间的建议需要修订。
The government's cocoa spraying gangs in Ghana treat about two million hectares of the crop against black pod disease and mirids, the key insect pests of cocoa in West Africa, each August through to December, based on recommendations issued in the 1950s. A few cocoa farmers use additional pesticides. We studied the temporal distribution of two important mirid species, Distantiella theobroma (Dist.) and Sahlbergella singularis Hagl., in 1991, 1999, 2003 and 2012 to determine the appropriate timing for the application of controlmeasures in current farming systems. There was a significant correlation between mirid abundance and pod availability on trees, as well as the number of basal shoots and the cocoa variety grown. Mirid populations peaked between January and April and from September to October. Surveys (interviews and focus group discussions involving over 300 farmers in 33 cocoa-growing districts) on pesticide use, sources of recommendations, and perceived successes and failures of current cocoa pest treatments suggested that the 1950 recommendations on the timing of insecticide application need revising.