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Nondormancy in Entomophaga maimaiga azygospores: effects of isolate and cold exposureAuthor(s): Ann E. Hajek; Allison E. Burke; Charlotte Nielsen; Joshua J. Hannam; Leah S. Bauer
Source: Mycologia. 100(6): 833-842.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
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DescriptionAzygospores (resting spores) of the fungal pathogen Entomophaga maimaiga are produced in later larval instars of the gypsy moth Lymantria dispar and normally enter constitutive dormancy. In the laboratory cadavers of recently dead larvae containing immature azygospores were placed on 1.0% water agar at 20 C for 2 wk after host death, allowing time for azygospore maturation. We found that some azygospores produced in this way did not enter dormancy. To investigate nondormancy, suspensions of azygospores from individual cadavers were transferred to moist, sterile soil at 15 C. Groups of gypsy moth larvae were exposed sequentially to azygospores for consecutive 4 d periods for 196 d. Infections first were seen among larvae exposed 24?28 d after bioassays began, and infection potential continued 196 d.
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CitationHajek, Ann E.; Burke, Allison E.; Nielsen, Charlotte; Hannam, Joshua J.; Bauer, Leah S. 2008. Nondormancy in Entomophaga maimaiga azygospores: effects of isolate and cold exposure. Mycologia. 100(6): 833-842.
Keywordsbiological control, Entomophthorales, gypsy moth, Lymantria dispar, spore dormancy, Zygomycota
- Interaction between a Nosema sp. (Microspora: Nosematidae) and Nuclear Polyhedrosis Virus Infecting the Gypsy Moth, Lymantria dispar (Lepidoptera: Lymantriidae)1
- Quantifying horizontal transmission of Nosema lymantriae, a microsporidian pathogen of the gypsy moth, Lymantria dispar (Lep., Lymantriidae) in field cage studies
- Comparison of the Hatch of Lymantria dispar (Lepidoptera: Lymantriidae) Eggs from Russia and the United States After Exposure to Different Temperatures and Durations of Low Temperature
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