Durier V, Rivault C
Unité Mixte de Recherche 6552, Centre National de la Recherche Scientifique-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France.
J Econ Entomol. 2003 Aug;96(4):1254-8. doi: 10.1093/jee/96.4.1254.
The aim of this study was to test the efficiency of gels in relation to fragmentation of baits and population density against the German cockroach, Blattella germanica (L.). We hypothesized that the efficiency of cockroach control could be improved by fragmentation of gel baits, i.e., by distributing the same amount of bait in several small drops instead of one large one. Our results show that bait fragmentation increased the number of cockroaches gaining access to the gel. However, bait fragmentation increased cockroach mortality only at high population densities. Our results allow us to recommend modulation of bait application in relation to cockroach population density. At low population densities (42 individuals/m2), the recommended dose, one single 30-mg drop/m2, can be applied. At high population densities (> or = 208 individuals/m2), the same recommended dose would be more efficient if applied as several 3-mg drops.
本研究的目的是测试凝胶在诱饵破碎以及针对德国小蠊（Blattella germanica (L.)）的种群密度方面的效果。我们假设通过将凝胶诱饵破碎，即把相同量的诱饵分成几个小滴而不是一个大滴，可以提高蟑螂防治的效果。我们的结果表明，诱饵破碎增加了接触到凝胶的蟑螂数量。然而，诱饵破碎仅在高种群密度时增加蟑螂死亡率。我们的结果使我们能够建议根据蟑螂种群密度调整诱饵的施用方式。在低种群密度（42只/平方米）时，可以施用推荐剂量，即每平方米一滴30毫克的单一剂量。在高种群密度（≥208只/平方米）时，若将相同的推荐剂量分成几个3毫克的小滴施用，效率会更高。
