Horizontal Transmission of the Entomopathogenic FungusBeauveria bassianaamong the Spruce Bark Beetle,Ips typographus(Col., Scolytidae) in the Laboratory and under Field Conditions
| Autor: | J. Kreutz, G. Zimmermann, O. Vaupel |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Biocontrol Science and Technology. 14:837-848 |
| ISSN: | 1360-0478 0958-3157 |
| DOI: | 10.1080/788222844 |
| Popis: | In laboratory and field cage experiments, the horizontal transmission of the entomopathogenic fungus Beauveria bassiana (Boverol®) between adults of the spruce bark beetle Ips typographus was examined. In a laboratory experiment, conidia transfer between treated and untreated beetles at different ratios resulted in 96% mortality (MST 4.3 days) at a ratio of 1:1 and 90% mortality (MST 4.5 days) at a ratio of 1:2. At ratios of 1:5, 1:10 and 1:20, the mortalities at 7 days were 83, 77 and 75%, respectively. In a second laboratory experiment, the efficacy of B. bassiana was investigated after transmission from contaminated to healthy beetles over a period of 5 days. Two weeks later, the mortality of treated and untreated beetles was 99% (control mortality was 44%), while the rate of mycosis was 79% in the treatment compared to 10% in the control beetles. A single contact between one treated male (2.0×105 conidia/beetle) and an untreated female was found to be sufficient to transmit a lethal dose of B. bassian... |
| Databáze: | OpenAIRE |
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