Temperature-dependent differences in biological traits between two strains of Trichogramma cacoeciae (Hymenoptera: Trichogrammatidae)
Temperature-dependent differences in biological traits between two strains of Trichogramma cacoeciae (Hymenoptera: Trichogrammatidae)
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DOI：
10.1007/s10340-010-0327-0
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发表时间：
2010-12-01
影响因子：
4.8
通讯作者：
Desneux, Nicolas
中科院分区：
文献类型：
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作者：
Pizzol, Jeannine;Pintureau, Bernard;Desneux, Nicolas
寄生蜂控制害虫的效率不仅取决于它们寄生其宿主的能力，还取决于它们在多大程度上适应计划释放它们的地区的气候条件（特别是温度）。此外，还对赤眼蜂等淹没释放用寄生蜂的最适生产条件进行了研究。也可以作为菌株的函数而变化很大。在实验室条件下，以赤眼蜂Trichogramma cacoeciae Marchal为生物学模型，研究了温度对赤眼蜂寄生效率相关生物学性状的影响。对两株T.在15、20、25和30 ℃的恒温下比较了一种来自法国（阿尔萨斯）和另一种来自突尼斯（Degache）的cacoeciae。法国品系的寄生蜂在25 ℃时对20 ℃或25 ℃饲养的黄蜂表现出最高的繁殖力。突尼斯菌株在25摄氏度下表现出最高的繁殖力，但只有当黄蜂之前在25或30摄氏度下饲养时。对于这两种菌株，最高的死亡率发生在30摄氏度产卵的黄蜂中。在所有温度下，出苗率都相对较高，尽管法国菌株在15-25摄氏度和突尼斯菌株在20-30摄氏度下表现更好。由于这两种T. cacoeciae菌株与温度的关系，当在生物防治程序中使用该物种时，必须在各种菌株中做出明智的选择。
Parasitoids' efficiency in controlling pests depends not only on their ability to parasitize their hosts but also on how much they are adapted to climatic conditions (notably temperature) of the area where they are planned to be released. In addition, the optimal conditions for production of parasitoids used for inundative releases like Trichogramma spp. may also vary largely as a function of strains. Using the parasitoid Trichogramma cacoeciae Marchal as biological model, we studied how temperature affects important parasitoid efficiency-related biological traits under laboratory conditions. Emergence, mortality rates and fecundity of two strains of T. cacoeciae, one originating from France (Alsace) and the other one from Tunisia (Degache), were compared at constant temperatures of 15, 20, 25 and 30 degrees C. The parasitoids of the French strain showed highest fecundity at 25 degrees C with wasps that had been reared at 20 or 25 degrees C. The Tunisian strain showed the highest fecundity at 25 degrees C, but only when wasps were previously reared at 25 or 30 degrees C. For both strains, the highest mortality occurred among wasps that had laid eggs at 30 degrees C. Emergence rates were relatively high at all temperatures, although the French strain did better at 15-25 degrees C and the Tunisian one at 20-30 degrees C. Because of the differences in biological traits of these two T. cacoeciae strains in relation to the temperature, a judicious choice must be made among the various strains when using this species in biological control programs.