Susceptibility of larvae of nun moth, Lymantria monacha (Linnaeus 1758) (Lepidoptera), to the entomopathogenic fungus, Entomophaga maimaiga Humber, Shimazu and Soper (Entomophthorales) under laboratory and field conditionsAuthor(s): Daniela Pilarska; Ann E. Hajek; Melody Keena; Andreas Linde; Manana Kereselidze; Georgi Georgiev; Margarita Georgieva; Plamen Mirchev; Danail Takov; Slavimira Draganova
Source: Acta Zoologica Bulgarica 68(1): 117-126.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
PDF: Download Publication (670.0 KB)
DescriptionSusceptibility of Lymantria monacha larvae to Entomophaga maimaiga was investigated under laboratory and field conditions, using larvae of the natural host, Lymantria dispar, as positive controls. In laboratory bioassays, L. monacha and L. dispar were injected with protoplasts of two isolates of E. maimaiga and mortality was monitored for 20 days. While virtually all injected L. dispar died, with ST50s (median survival times for 50% of insects injected with the two isolates) of six - seven days, only 65.6-86.7% of the injected L. monacha died, with ST50s of 11-17 days. Both isolates produced conidia and resting spores more frequently within dead L. dispar than L. monacha. In more ecologically relevant host range assays, larvae of both species were exposed to germinating soil-borne E. maimaiga resting spores in the laboratory. More L. dispar than L. monacha larvae died after these exposures. However, while resting spores were formed within 100% of L. dispar larvae that died, significantly fewer (10%) dead L. monacha contained resting spores. When L. monacha larvae were collected during an E. maimaiga epizootic occurring in a sympatric L. dispar population, only 0.2 % of the L. monacha died and produced spores. These findings corroborate those of previous studies reporting a narrow host range for this fungal pathogen.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationPilarska, Daniela; Hajek, Ann E.; Keena, Melody; Linde, Andreas; Kereselidze, Manana; Georgiev, Georgi; Georgieva, Margarita; Mirchev, Plamen; Takov, Danail; Draganova, Slavimira. 2016. Susceptibility of larvae of nun moth, Lymantria monacha (Linnaeus 1758) (Lepidoptera), to the entomopathogenic fungus, Entomophaga maimaiga Humber, Shimazu and Soper (Entomophthorales) under laboratory and field conditions. Acta Zoologica Bulgarica. 68(1): 117-126.
Keywordshost specificity, physiological host range, ecological host range, Lymantria monacha, Lymantria dispar, Entomophaga maimaiga
- Virulence and fitness of the fungal pathogen Entomophaga maimaiga in its host Lyrnantria dispar, for pathogen and host strains originating from Asia, Europe, and North America
- Nondormancy in Entomophaga maimaiga azygospores: effects of isolate and cold exposure
- Impact of Entomophaga maimaiga (Entomophthorales: Entomophthoraceae) on outbreak gypsy moth populations (Lepidoptera: Erebidae): the role of weather
XML: View XML