Cuthbertson A G S, North J P, Walters K F A
Central Science Laboratory, Sand Hutton, York, YO41 1LZ, UK.
Bull Entomol Res. 2005 Aug;95(4):321-7. doi: 10.1079/ber2005363.
The efficacy of two entomopathogenic biocontrol agents, Steinernema feltiae (Filipjev) and Verticillium lecanii (Zimmerman) Viégas (reclassified now as Lecanicillium muscarium (Petch) Zare & Gams), against Thrips palmi Karny was investigated. Assessments of the effect of temperature on the efficacy of S. feltiae indicated that higher mortality of T. palmi was recorded at 20 degrees C compared to either 15 or 25 degrees C, whereas significantly higher T. palmi mortality followed application of L. muscarium at 25 degrees C. Testing the control agents efficacy on three host plants; chrysanthemum, sweet pepper and cucumber, under constant temperature and high humidity conditions produced no significant difference in the level of T. palmi larval mortality on each host plant. Incorporating the chemical insecticide imidacloprid with both biological agents in a combined control strategy increased T. palmi juvenile mortality. The potential role of S. feltiae and L. muscarium within integrated pest management programmes for the control of T. palmi is discussed.
研究了两种昆虫病原生物防治剂，即斯氏线虫（Steinernema feltiae (Filipjev)）和蜡蚧轮枝菌（Verticillium lecanii (Zimmerman) Viégas，现重新分类为蜡蚧霉（Lecanicillium muscarium (Petch) Zare & Gams））对棕榈蓟马（Thrips palmi Karny）的防治效果。评估温度对斯氏线虫防治效果的影响表明，与15℃或25℃相比，在20℃时棕榈蓟马的死亡率更高，而在25℃施用蜡蚧霉后，棕榈蓟马的死亡率显著更高。在恒温高湿条件下，测试这两种防治剂对三种寄主植物（菊花、甜椒和黄瓜）上棕榈蓟马幼虫的防治效果，结果显示在每种寄主植物上，棕榈蓟马幼虫的死亡率水平没有显著差异。在综合防治策略中，将化学杀虫剂吡虫啉与这两种生物防治剂结合使用，可提高棕榈蓟马若虫的死亡率。本文还讨论了斯氏线虫和蜡蚧霉在棕榈蓟马综合虫害管理计划中的潜在作用。
