Journal of Invertebrate Pathology | VOL. 194
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Compatibility of the bacterial entomopathogen Pseudomonas protegens with the natural predator Chrysoperla carnea (Neuroptera: Chrysopidae)

Publication Date Oct 1, 2022

Abstract

The susceptibility of the green lacewing Chrysoperla carnea to the soil-dwelling bacterial entomopathogen Pseudomonas protegens CHA0 was investigated in this study. Laboratory bioassays were conducted on larval instars exposed to different bacterial concentrations by both direct feeding and indirectly by offering a pre-treated insect prey. Potential toxicity was assessed through dose-response bioassays, while possible sublethal effects were evaluated on immature development time and the reproductive performance (fecundity) of adults emerging from treated juveniles. As a result, no significant effects were observed on larval survival and development in a comparison between treated and untreated (control) groups. No significant impact on adult emergence and no detrimental effects on female fecundity were detected. Everything considered, the use of P. protegens in the agroecosystem appears to be compatible with chrysopids.

Concepts

Immature Development Time Dose-response Bioassays Direct Feeding Laboratory Bioassays Bacterial Concentrations Sublethal Effects Larval Survival Female Fecundity Reproductive Performance Adult Emergence

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