Effect of Temperature on Vegetative Growth of Beauveria bassiana Isolates from Different Origins

Fargues, Jacques; Goettel, Mark S.; Smits, Nathalie; Ouédraogo, A.; Rougier, M.

doi:10.2307/3761032

Cited by 127 publications

(83 citation statements)

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“…A comparison between tropical and temperate strains of B. bassiana failed to show a significant difference in the aptitude to grow at high temperatures. These results are similar to those obtained by Fargues et al (1997) where an association between thermotolerance and geographic origin was not found. For M. anisopliae, a marked difference was found, in contradiction with the observations of Rangel et al (2005).…”

Section: Discussionsupporting

confidence: 95%

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Pathogenicity and thermotolerance of entomopathogenic fungi for the control of the scab mite, Psoroptes ovis

et al. 2008

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Psoroptes ovis is responsible for a highly contagious skin condition, both in sheep and cattle. This parasite has a marked economical impact in the sheep and cattle industry. Biological control is considered as a realistic alternative to chemotherapeutic control. Laboratory experiments were carried out to evaluate the pathogenicity and the thermotolerance of twelve isolates of entomopathogenic fungi from four genera (Beauveria Vuillemin, Metarhizium Sorokin, Paecilomyces Bainier and Verticillium Nees). The pathogenicity was evaluated by the survival of P. ovis females after exposure to 10(6) to 10(8) conidia ml(-1) in humidity chambers. Results revealed intra- and interspecies differences. All isolates with the exception of B. bassiana IHEM3558 and V. lecanii MUCL8672 induced 50% mortality within 2 days at the highest concentration. At this concentration the entire mite population became infected with all isolates but B. bassiana IHEM3558; however, only four isolates gave rise to 100% infected cadavers at the lowest concentration. The thermotolerance of each isolate was evaluated by measuring its growth on an artificial medium kept between 25 and 37.5 degrees C. All isolates were able to grow up to 30 degrees C but only two, M. anisopliae IHEM18027 and Paecilomyces farinosus MUCL18885, tolerated temperatures up to 35 degrees C. These two isolates could be considered as good candidates for further use as biopesticide taking into account their virulence and thermotolerance. Other critical factors linked with the implementation of this type of biocontrol in P. ovis infected animals are discussed.

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Section: Discussionsupporting

confidence: 95%

“…In their study, Abolins et al (2007) have also demonstrated the absence of fungal inhibitors in the fleece of the sheep. A saprophytic microflora can in fact be present on the tegument of the arthropods or on the hair of the host and stimulate or suppress the germination of the conidia in vivo (Schabel 1978;Fargues 1981;Polar et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Pathogenicity and thermotolerance of entomopathogenic fungi for the control of the scab mite, Psoroptes ovis

et al. 2008

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“…Fargues et al (1997) and Vidal et al (1997) reported that most isolates of B. bassiana and P. fumosoroseus are inhibited by temperatures greater than 32-35°C. However, the trials reported here were conducted from April to September, when the daily temperature ranges from 30 to 38°C and relative humidity ranges from 70 to 80%.…”

Section: Discussionmentioning

confidence: 97%

Laboratory and field evaluation of Beauveria bassiana for controlling Mulberry whitefly Pealius mori Takahashi (Homoptera: Aleyrodidae) in mulberry (Morus alba Linn)

2009

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In a laboratory screening of 12 isolates of entomopathogenic fungi against nymphs of the mulberry whitefly (Pealius mori Takahashi), Beauveria bassiana (Balsamo-Crivelli) Vuillemin CKB-048 was the most virulent, causing 87 ± 3% mortality at 1 9 10 6 conidia/ml. Infection was confirmed by growth of the fungus from cadavers and by scanning electron microscopy of treated nymphs. Beauveria bassiana CKB-048 was formulated as a wettable powder (1 9 10 9 conidia/g) and tested in two mulberry (Morus alba Linn) plantations in central and northeastern Thailand. In both locations, two spray applications of B. bassiana CKB-048 at 3.75 9 10 12 to 6.25 9 10 12 conidia/ha and at 14 day intervals provided good control of whitefly nymphs; control with B. bassiana CKB-048 was comparable to that with the pesticide buprofezin at 250 g of active ingredient/ha. In addition, no mortality of silkworm larvae occurred when the larvae were fed with mulberry leaves sprayed with B. bassiana CKB-048 7, 14, or 21 days earlier.

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“…Many authors investigating other fungal species found that the first 12 days of in vitro growth may be well represented by a linear model (e.g. Vidal et al 1997;Fargues et al 1997;Ekesi 1999), which corresponds to the exponential phase of growth.…”

Section: Discussionmentioning

confidence: 99%

Effect of temperature on the in vitro radial growth of Zoophthora radicans and Pandora blunckii, two co-occurring fungal pathogens of the diamondback moth Plutella xylostella

et al. 2007

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The effect of four different temperatures (15, 20, 25 and 308C) on the in vitro growth of 19 isolates of Pandora blunckii and 14 isolates of Zoophthora radicans from Plutella xylostella larvae was investigated. Both species grew more at 20 and 258C than the other two temperatures. However, Z. radicans grew more than P. blunckii at 20 and 258C. Within each species there were differences amongst: all isolates regardless of geographical origin, isolates from different countries and isolates from Mexico. No relationship was found between optimal growth temperature and geographical origin. This represents the first report of the relationship between temperature and the in vitro growth of P. blunckii.The ecological role of this large variability amongst isolates within each species is discussed.

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Effect of Temperature on Vegetative Growth of Beauveria bassiana Isolates from Different Origins

Cited by 127 publications

References 0 publications

Pathogenicity and thermotolerance of entomopathogenic fungi for the control of the scab mite, Psoroptes ovis

Pathogenicity and thermotolerance of entomopathogenic fungi for the control of the scab mite, Psoroptes ovis

Laboratory and field evaluation of Beauveria bassiana for controlling Mulberry whitefly Pealius mori Takahashi (Homoptera: Aleyrodidae) in mulberry (Morus alba Linn)

Effect of temperature on the in vitro radial growth of Zoophthora radicans and Pandora blunckii, two co-occurring fungal pathogens of the diamondback moth Plutella xylostella

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