首页> 美国卫生研究院文献>Bulletin of the World Health Organization >Lutte contre Culex quinquefasciatus par Bacillus sphaericus: résultats dune campagne pilote dans une grande agglomération urbaine dAfrique équatoriale.
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Lutte contre Culex quinquefasciatus par Bacillus sphaericus: résultats dune campagne pilote dans une grande agglomération urbaine dAfrique équatoriale.

机译:球形芽孢杆菌控制库蚊(Culex quinquefasciatus):赤道非洲大型城市群试点活动的结果。

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摘要

Culex quinquefasciatus, which is sometimes the vector of Bancroft's filariasis, is a harmful mosquito, the immature stages of which live in collections of waste water resulting from human activity. Larval control, the most appropriate method, is at present carried out with chemical insecticides. But the toxicity of these compounds, together with phenomena of resistance, and the cost of substitute insecticides have turned research towards products of biological origin, and one of the most promising is a liquid concentrate of Bacillus sphaericus strain 2362. This was applied experimentally over an area of 200 hectares in a large city in the south of Cameroon, characterized by a short dry season during which mosquito density is at its highest. Spraying was carried out every three months for a year in a concentration of 10 g/m2 and its efficacy evaluated at the level of adult mosquitos through an indirect system of capture on human baits. The results of this study show, in essence, a reduction by 52.7% in the number of females captured in the overall study area treated, and that the impact of treatment is greater during the period of high mosquito density (55.1%) than in the low density period (40.7%). After analysis of the full set of results, the authors conclude that the pattern of rainfall, the conditions in which the insecticide is applied and reinvasions of mosquitos from untreated areas were the principal factors limiting the efficacy of this control campaign.(ABSTRACT TRUNCATED AT 250 WORDS)
机译:有时是班克罗夫特(Bancroft)丝虫病病媒的昆蚊(Culex quinquefasciatus)是一种有害的蚊子,其未成熟阶段生活在人类活动产生的废水中。目前最有效的控制幼虫的方法是化学杀虫剂。但是这些化合物的毒性以及耐药性现象和替代杀虫剂的成本已将研究转向了生物来源的产品,最有前途的产品之一是球形芽孢杆菌2362菌株的液体浓缩物。喀麦隆南部一个大城市的200公顷土地面积,特点是干旱季节短,期间蚊子密度最高。每年每三个月以10 g / m2的浓度进行喷洒,并通过间接诱捕人类诱饵的方法在成年蚊子的水平上评估其功效。这项研究的结果从本质上表明,在接受治疗的整个研究区域中,被捕捕的女性数量减少了52.7%,并且在高蚊子密度(55.1%)期间,治疗的影响更大。低密度期(40.7%)。在对全部结果进行分析之后,作者得出结论,降雨模式,施用杀虫剂的条件以及未处理地区的蚊子入侵是限制该控制措施效力的主要因素。(摘要摘录于250话)

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