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      Pathogenicity virulence of Beauveria spp. and biosafety of the BbMQ strain on adult ectoparasitic beetles, Dastarcus helophoroides Fairmaire (Coleoptera: Colydiidae)

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          Abstract

          Introduction

          Beauveria spp. and Dastarcus helophoroides Fairmaire adults were simultaneously released to attack elder larvae or pupae of Monochamus alternatus in pine forests in China. However, little is known about the pathogenicity virulence and biosafety of Beauveria spp. on beneficial adults of D. helophoroides, and specific Beauveria bassiana (Bb) strains should be selected for synthetic release together with D. helophoroides.

          Methods

          A total of 17 strains of Beauveria spp. were collected, isolated, and purified, and then their mortality, cadaver rate, LT50, spore production, spore germination rate, and growth rate of D. helophoroide adults were calculated based on 0–20 days data after spore suspension and powder contact.

          Results and discussion

          The lethality rate of BbMQ, BbFD, and BbMH-03 strains to D. helophoroides exceeded 50%, and the cadaver rate reached 70.6%, among which the mortality rate (82.22%), cadaver rate (47.78%), spore production (1.32 × 10 9 spores/ml), spore germination rate (94.71%), colony dimension (49.15 mm 2), and LT 50 (10.62 d) of the BbMQ strain were significantly higher than those of other strains ( P < 0.01), and the mortality of D. helophoroides adults increased significantly with increased spore suspension concentration, with the highest mortality reaching 92.22%. This strain was identified as Beauveria bassiana by morphological and molecular methods, while the BbWYS strain had a minimum lethality of only 5.56%, which was safer compared to other strains of adult D. helophoroide. Consequently, the biological characteristics and pathogenicity of different Beauveria bassiana strains varied significantly in their effects on D. helophoroide adults, and the safety of different strains should be assessed when they are released or sprayed to control multiple pests in the forest. The BbMQ strain should not be simultaneously sprayed with releasing D. helophoroide adults in the same forest, while the BbWYS strain can be used in concert with D. helophoroide to synergize their effect.

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          Most cited references32

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          Recent advances in biological control of important native and invasive forest pests in China

          Zhong-Qi Yang, Xiao-Yi Wang, Yi-Nan Zhang (2014)
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            Pathogenicity and virulence.

            S. Thomas, Joseph S. Elkinton (2004)
            Invertebrate pathologists have multiple definitions for the terms pathogenicity and virulence, and these definitions vary across disciplines that focus on host-pathogen interactions. We surveyed various literatures, including plant pathology, invertebrate pathology, evolutionary biology, and medicine, and found most define pathogenicity as the broader term, which incorporates virulence. Virulence is seen as the severity of disease manifestation that can only be measured in infected individuals. These definitions readily apply to both lethal and non-lethal diseases. Invertebrate pathologists commonly use dose-response bioassays to estimate LD(50) or LC(50) (dose or concentration needed to kill 50% of hosts exposed). These bioassays measure pathogenicity if the bioassay includes a transmission component, and measure virulence if the bioassay is measured in infected individuals only. Another common bioassay estimate is LT(50) (median time to death of infected hosts), which is a measure of virulence as long as survivors are not included in its calculation.
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              Can Beauveria bassiana Bals. (Vuill) (Ascomycetes: Hypocreales) and Tamarixia triozae (Burks) (Hymenoptera: Eulophidae) be used together for improved biological control of Bactericera cockerelli (Hemiptera: Triozidae)?

              Fernando Tamayo-Mejía, Ariel W. Guzmán-Franco, Patricia Tamez-Guerra … (2015)
              Article 0 comments Cited 8 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                Journal
                Journal ID (nlm-ta): Front Vet Sci
                Journal ID (iso-abbrev): Front Vet Sci
                Journal ID (publisher-id): Front. Vet. Sci.
                Title: Frontiers in Veterinary Science
                Publisher: Frontiers Media S.A.
                ISSN (Electronic): 2297-1769
                Publication date (Electronic): 16 May 2023
                Publication date Collection: 2023
                Volume: 10
                Electronic Location Identifier: 1077473
                Affiliations
                [1] 1Forestry College, Fujian Agriculture and Forestry University, Fuzhou , Fujian, China
                [2] 2Forest Pest and Disease Control and Quarantine Station, Forestry Bureau of Fuzhou City, Fuzhou , Fujian, China
                [3] 3Fujian Academy of Forestry, Fuzhou , Fujian, China
                [4] 4Provincial Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Agriculture and Forestry University, Fuzhou , Fujian, China
                Author notes

                Edited by: Dirk Werling, Royal Veterinary College (RVC), United Kingdom

                Reviewed by: Javier A. Garza-Hernandez, Universidad Autónoma de Ciudad Juárez, Mexico; Roberto Senas Cuesta, University of Arkansas, United States

                *Correspondence: Guanghong Liang fjlhg@ 123456126.com

                †These authors have contributed equally to this work

                Article
                DOI: 10.3389/fvets.2023.1077473
                PMC ID: 10229101
                SO-VID: 78d6be59-4d2d-4079-b277-336f8cee7f4f
                Copyright © Copyright © 2023 Zhou, Lu, Chen, Ye, Fang, Zhang, Cai, Zhang and Liang.
                License:

                This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

                History
                Date received : 25 October 2022
                Date accepted : 31 March 2023
                Page count
                Figures: 5, Tables: 5, Equations: 0, References: 33, Pages: 10, Words: 6238
                Funding
                Funded by: National Key Research and Development Program of China, doi 10.13039/501100012166;
                This study was financially supported by the Forestry Peak Discipline Construction Project of Fujian Agriculture and Forestry University (No.72202200205), the National Key Research and Development Program of China (2018YFC1200400), and the National Natural Science Fund of China (No. 31870641).
                Categories
                Subject: Veterinary Science
                Subject: Original Research
                Custom metadata
                section-at-acceptance Veterinary Infectious Diseases

                Keywords: dastarcus helophoroides fairmaire,beauveria bassiana,monochamus alternatus hope,pathogenicity,biological control,virulence
                Data availability:
                Keywords: dastarcus helophoroides fairmaire, beauveria bassiana, monochamus alternatus hope, pathogenicity, biological control, virulence

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