Pathogenicity of Beauveria bassiana (Balsamo-Crivelli) and Metarhizium anisopliae (Metschnikoff) isolates against life stages of Zeugodacus cucurbitae (Coquillett) (Diptera: Tephritidae)
Background Entomopathogenic fungi are primary pathogens that naturally affect insect pests by suppressing their populations and considered as an ecofriendly agents. The present study aimed to evaluate in vitro activity of different isolates of Beauveria bassiana and Metarhizium anisopliae against th...
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Veröffentlicht in: | Egyptian journal of biological pest control 2023-04, Vol.33 (1), p.45-13, Article 45 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Background
Entomopathogenic fungi are primary pathogens that naturally affect insect pests by suppressing their populations and considered as an ecofriendly agents. The present study aimed to evaluate in vitro activity of different isolates of
Beauveria bassiana
and
Metarhizium anisopliae
against the development of larval stages of the Cucurbit fruit fly,
Zeugodacus cucurbitae
(Coquillett) (Diptera: Tephritidae).
Results
Larval mortality was significantly high with
B. bassiana
isolate Bb337 (5.82–21.70%) and with the lowest in
M. anisopliae
isolate MaD (1.49–6.33%). Pupal mortality rate was comparatively higher with more than 50%. The cadavers of all host instars produced conidia (sporulation). Sporulated dead larvae were significantly higher in Bb337 (61.10%) than at the least in MaD (18.60%) at 10
5
conidia/ml. At 10
8
conidia/ml, MaD induced the highest pupal cadavers with mycosis (32.42%). Regardless of applied fungal species, host instars mortality significantly increased with increasing concentration of
B. bassiana
isolates, suggesting a concentration-dependent response of
Z. cucurbitae.
Conclusion
The tested isolates demonstrated their pathogenicity through vertical transmission of mycosis from one instar to another, regardless of the concentrations used. |
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ISSN: | 2536-9342 1110-1768 2536-9342 |
DOI: | 10.1186/s41938-023-00693-0 |