Ruiu Luca, Lazzeri Anna Marta, Nuvoli Maria Tiziana, Floris Ignazio, Satta Alberto
Dipartimento di Agraria, University of Sassari, Viale Italia 39, 07100 Sassari, Italy.
Dipartimento di Agraria, University of Sassari, Viale Italia 39, 07100 Sassari, Italy.
J Invertebr Pathol. 2020 Jan;169:107281. doi: 10.1016/j.jip.2019.107281. Epub 2019 Nov 21.
The safety of the entomopathogenic bacterium Brevibacillus laterosporus for the natural insect predator Chrysoperla agilis was evaluated in this study. For this purpose, laboratory bioassays were conducted exposing different larval instars and adults of the chrysopid to bacterial spore preparations, in order to evaluate the possible effects on survival, longevity, immature development, and adult reproductive performance. The sub-lethal effects were investigated by feeding the bacterium directly to adults and larvae of C. agilis or to mealworm beetles (Tenebrio molitor) used as hosts for chrysopids (tritrophic interaction). Direct feeding of B. laterosporus spores to different lacewing larvae instars and to adults did not cause mean mortality levels significantly different from untreated control, and slight though not significant effects of treatments were generally observed on insect longevity, development, fecundity and egg hatching. In the case of lacewing larvae feeding on treated mealworm beetles, adult emergence percentage was reduced approximately 12%, in comparison with untreated control. Based on these results, the use of B. laterosporus for pest management in the agroecosystem, appears to be compatible with chrysopids.
本研究评估了昆虫病原细菌短芽孢杆菌对天然昆虫捕食者敏捷草蛉的安全性。为此，进行了实验室生物测定，将草蛉不同龄期幼虫和成虫暴露于细菌孢子制剂中，以评估其对存活、寿命、未成熟发育和成虫繁殖性能的可能影响。通过将细菌直接喂给敏捷草蛉的成虫和幼虫或喂给用作草蛉宿主的黄粉虫（黄粉虫）来研究亚致死效应（三级营养相互作用）。将短芽孢杆菌孢子直接喂给不同龄期的草蛉幼虫和成虫，其平均死亡率与未处理对照无显著差异，且处理对昆虫寿命、发育、繁殖力和卵孵化的影响通常较小但不显著。在用处理过的黄粉虫喂养草蛉幼虫的情况下，与未处理对照相比，成虫羽化率降低了约12%。基于这些结果，在农业生态系统中使用短芽孢杆菌进行害虫管理似乎与草蛉兼容。
