Safety evaluation of the entomopathogenic bacterium Brevibacillus laterosporus for the green lacewing Chrysoperla agilis (Neuroptera: Chrysopidae).

Autor: Ruiu L; Dipartimento di Agraria, University of Sassari, Viale Italia 39, 07100 Sassari, Italy. Electronic address: lucaruiu@uniss.it., Lazzeri AM; Dipartimento di Agraria, University of Sassari, Viale Italia 39, 07100 Sassari, Italy., Nuvoli MT; Dipartimento di Agraria, University of Sassari, Viale Italia 39, 07100 Sassari, Italy., Floris I; Dipartimento di Agraria, University of Sassari, Viale Italia 39, 07100 Sassari, Italy., Satta A; Dipartimento di Agraria, University of Sassari, Viale Italia 39, 07100 Sassari, Italy.
Jazyk: angličtina
Zdroj: Journal of invertebrate pathology [J Invertebr Pathol] 2020 Jan; Vol. 169, pp. 107281. Date of Electronic Publication: 2019 Nov 21.
DOI: 10.1016/j.jip.2019.107281
Abstrakt: 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.
(Copyright © 2019 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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