Natural occurrence of Beauveria bassiana on adults of the invasive mango seed weevil Sternochetus mangiferae (Coleoptera: Curculionidae) in Brazil

Silva, Alessandra Carvalho; Ricalde, Marcelo Perrone; Scalzer, Raiza Ritielle Carvalho; Zilli, Jerri Edison; Lopes, Rogério Biaggioni

doi:10.1007/s41348-021-00550-y

Cited by 2 publications

(1 citation statement)

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“…The soil is the richest reservoir of microbial species and also contains Beauveria bassiana , which parasitizes and kills overwintering or ground-moving insects on the surface, as commonly reported in studies of many orchard pests [ 12 , 13 ]. In support of this idea, in 2020, we found corpses of Dioryctria larvae killed by infection with a wild B. bassiana strain while overwintering in forest litter.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Analysis of Transcriptome Response of Dioryctria sylvestrella (Lepidoptera: Pyralidae) Larvae Infected with Beauveria bassiana under Short-Term Starvation

Guo

Jia

Chen

et al. 2023

Insects

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The Dioryctria genus contains several destructive borer pests that are found in coniferous forests in the Northern Hemisphere. Beauveria bassiana spore powder was tested as a new method of pest control. In this study, Dioryctria sylvestrella (Lepidoptera: Pyralidae) was used as the object. A transcriptome analysis was performed on a freshly caught group, a fasting treatment control group, and a treatment group inoculated with a wild B. bassiana strain, SBM-03. Under the conditions of 72-h fasting and a low temperature of 16 ± 1 °C, (i) in the control group, 13,135 of 16,969 genes were downregulated. However, in the treatment group, 14,558 of 16,665 genes were upregulated. (ii) In the control group, the expression of most genes in the upstream and midstream of the Toll and IMD pathways was downregulated, but 13 of the 21 antimicrobial peptides were still upregulated. In the treatment group, the gene expression of almost all antimicrobial peptides was increased. Several AMPs, including cecropin, gloverin, and gallerimycin, may have a specific inhibitory effect on B. bassiana. (iii) In the treatment group, one gene in the glutathione S-transferase system and four genes in the cytochrome P450 enzyme family were upregulated, with a sharp rise in those that were upregulated significantly. In addition, most genes of the peroxidase and catalase families, but none of the superoxide dismutase family were upregulated significantly. Through innovative fasting and lower temperature control, we have a certain understanding of the specific defense mechanism by which D. sylvestrella larvae may resist B. bassiana in the pre-wintering period. This study paves the way for improving the toxicity of B. bassiana to Dioryctria spp.

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Section: Introductionmentioning

confidence: 99%