Experimental evaluation of insecticidal paints against Triatoma infestans (Hemiptera: Reduviidae), under natural climatic conditions
Experimental evaluation of insecticidal paints against Triatoma infestans (Hemiptera: Reduviidae), under natural climatic conditions
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DOI：
10.1186/1756-3305-2-30
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发表时间：
2009-07-08
影响因子：
3.2
通讯作者：
Gorla, David E.
中科院分区：
文献类型：
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作者：
Amelotti, Ivana;Catala, Silvia S.;Gorla, David E.
背景：致病锥虫是南美大查科地区南美锥虫病的主要传播媒介。在阿根廷流行地区，使用拟除虫菊酯类杀虫剂的传统喷洒技术在消除占据农村房屋围屋结构的病媒物种种群方面效率低下。作为寻找更好的替代品的研究的一部分，我们评估了杀虫涂料对四龄幼虫死亡率的残留影响。infestans.Results:该研究是基于一个实验设计，其中包括两组处理与有机磷酸盐（Inesfly 5A IGR（TM））和拟除虫菊酯（Inesfly 5A IGR NG（TM））配方的油漆，这是适用于木材，水泥块和土坯砖在自然气候条件下。第三组是未治疗的对照组。这两种涂料配方都显示出很长的残留活性，在涂料应用12个月后产生的死亡率分别为84%和98%（拟除虫菊酯和有机磷酸酯配方）。在8个月后，在6小时内暴露于含有拟除虫菊酯和有机磷酸酯制剂的涂漆表面的昆虫分别显示出81.33%和100%的死亡率。基于有机磷酸酯和拟除虫菊酯的杀虫涂料显示出对四龄致病锥蝽死亡率的非常长的残留活性，在阿根廷大查科查加斯病流行地区，拟除虫菊酯类杀虫剂在农村房屋的住宅周围结构中使用传统的喷洒技术。在传统方法失效或效力低下的地区，可考虑由经过培训的病媒控制方案人员使用油漆作为替代控制工具。
Background: Triatoma infestans is the main vector of Chagas disease in the Gran Chaco region of South America. The traditional spraying technique used for the application of pyrethroid insecticides has shown low efficiency in the elimination of the vector species populations occupying peridomestic structures of rural houses in the endemic area of Argentina. As part of studies looking for better alternatives, we evaluated the residual effect of insecticidal paints on the mortality of fourth instar nymphs of T. infestans.Results: The study was based on an experimental design that included two groups treated with an organophosphate (Inesfly 5A IGR(TM)) and a pyrethroid (Inesfly 5A IGR NG(TM)) formulations of the paint, that were applied on wood, cement blocks and adobe bricks under natural climatic conditions. A third group was an untreated control. Both paint formulations showed very long residual activity, producing mortality of 84% and 98% (pyrethroid and organophosphate formulations, respectively) after 12 months of the paint application. After eight months, nymphs exposed during 6 hours to the painted surfaces with the pyrethroid and organophosphate formulations showed 81.33% and 100% mortality, respectively.Conclusion: The organophosphate- and pyrethroid-based insecticidal paints showed a very long residual activity on the mortality of fourth instar nymphs of T infestans, compared with the traditional spraying technique used for the application of pyrethroid insecticides in peridomestic structures of rural houses in the endemic region for Chagas disease in the Gran Chaco of Argentina. The application of the paints by trained personnel of the vector control programmes could be considered as an alternative control tool in areas where the traditional methods have failed or showed low efficacy.