Bulletin of Insectology (2008) 61, 67-71

Florian Weihrauch (2008)
Overwintering of common green lacewings in hibernation shelters in the Hallertau hop growing area
Bulletin of Insectology 61 (1), 67-71
Abstract: During three winters from autumn 2002 to 2005, hibernation shelters for green lacewings (Chrysoperla spp.) were deployed at various sites in the Hallertau hop-growing area in Bavaria, Germany. Exposure sites were the wooden trellis support poles of two hop gardens and, nearby, a hill ridge, a sheltered topographic depression, a forest margin, a small forest clearing and a fallow boundary strip. A total of 39 shelters were examined in January during the three years, and the total of 5162 hibernating lacewings present were identified, sexed and counted. More Chrysoperla spp. overwintered each winter in the shelters on hop poles than at any other position. The mean numbers ranged from 238 to 336 lacewings per shelter. Chrysoperla carnea was the dominant species, Chrysoperla pallida was also common, and only few specimens of Chrysoperla lucasina were identified. The sex ratio of C. carnea in the shelters was significantly female biased, whereas significantly fewer females than males of C. pallida were found, and in C. lucasina the sex ratio was not significantly different. Overall mortality was 0.9%.
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Database assignments for author(s): Florian Weihrauch

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
population dynamics/epizootiology
surveys/distribution/isolation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Chrysoperla carnea (predator)			Germany
Chrysoperla pallida (predator)			Germany
Chrysoperla lucasina (predator)			Germany