Applied Entomology and Zoology (2004) 39, 469-475

Mitsuaki Shimazu (2004)
Effects of temperature on growth of Beauveria bassiana F-263, a strain highly virulent to the Japanese pine sawyer, Monochamus alternatus, especially tolerance to high temperatures
Applied Entomology and Zoology 39 (3), 469-475
Abstract: Mycelial growth and germination rates of Beauveria bassiana F-263 at various temperatures were investigated to determine efficient culture conditions and tolerance of this strain to higher temperatures. Mycelial growth was quantified by measuring colony diameters at constant temperatures and occurred from 6 to 33°C, with maximal growth at 30°C. The fungus could recover and grow when transferred to 25°C after exposure to higher temperatures, even if the fungus did not grow during high temperature exposures. The longest high temperature periods after which this fungus survived were 8 d at 35°C and 4 d at 36°C when initiated with hyphal bodies and more than 14 d at 35°C and 7 d at 36°C when initiated with conidia. At 25 to 30°C, the conidial germination rate rose to almost 100% within 20 h. At 34°C, germination was very low within 20 h, but almost 100% over 48 h. At 35°C, germination was only 4.6% even more than 4 d after inoculation, although most conidia inflated within 24 h. No germination was observed at 36°C, although most conidia inflated within 24 h. Growth rates of germ tubes from conidia were slower at temperatures higher than 33°C.
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Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Monochamus alternatus		Japan
Beauveria bassiana (entomopathogen)	Monochamus alternatus		Japan