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首页> 外文期刊>Journal of Economic Entomology >Enhanced efficacy of Beauveria bassiana for red flour beetle with reduced moisture
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Enhanced efficacy of Beauveria bassiana for red flour beetle with reduced moisture

机译：球孢白僵菌对降低水分的红甲虫的功效增强

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Red flour beetle, Tribolium castaneum (Herbst), is a major pest of stored and processed grains that is tolerant of Beauveria bassiana (Balsamo) Vuillemin under most conditions. Laboratory assays demonstrated that desiccating conditions improved the efficacy of the fungus. For T. castaneum larvae exposed to B. bassiana at different vapor pressure deficits (VPDs), the LC50 potency ratios were 2.3 for 2.42 kPa and 3.9 for 3.31 kPa compared with 1.06 kPa. There were significant effects of moisture on B. bassiana-associated mortality even with brief exposure to low VPD before or at the beginning of exposure to fungus. When T. castaneum larvae were held at 3.31 kPa 1 d before exposure to B. bassiana and/or in the first I or 2 d of exposure to the fungus, there was significantly greater mortality for all of the low moisture treatments than occurred with continuous incubation at 1.06 kPa. B. bassiana efficacy for adult T castaneum was significantly better for VPDs of 3.56 or 3.78 than 1.06 kPa. Weight gain over 4 d of incubation with moisture held constant was significantly less at a VDP of 3.31 kPa than at 1.87 or 1.06 kPa. Treatment with fungus did not affect weight gain significantly. There was no significant difference in larval water content among treatments.
机译：红色面粉甲虫Tribolium castaneum（Herbst）是储存和加工谷物的主要害虫，在大多数情况下都可以耐受白僵菌（Balveria bassiana（Balsamo）Vuillemin）。实验室分析表明，干燥条件改善了真菌的功效。对于暴露于不同蒸气压亏缺（VPD）的球孢白僵菌（B. bassiana）的锥栗幼虫（T. castaneum）幼虫，LC2的效力为2.42 kPa，LC50效力比为3.31 kPa，3.9相对于1.06 kPa。即使在暴露于真菌之前或开始时短暂暴露于低VPD，水分也对球孢杆菌相关死亡率产生了显着影响。在暴露于球孢白僵菌之前1 d和/或暴露于真菌的前1或2 d，将锥栗幼虫的幼虫保持在3.31 kPa时，与连续施用相比，所有低水分处理的死亡率均显着更高。在1.06 kPa下孵育。对于3.56或3.78的VPD，B。bassiana对成人T cast的功效明显优于1.06 kPa。在VDP为3.31 kPa的条件下，保持湿度恒定4天后，体重增加明显小于1.87或1.06 kPa。真菌治疗不会显着影响体重增加。各处理之间的幼虫含水量无显着差异。

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