THE POTENTIAL FOR ESTABLISHMENT OF THE EGG PARASITE OOENCYRTUS KUWANAI IN ONTARIO POPULATIONS OF THE GYPSY MOTH
- 1 June 1978
- journal article
- research article
- Published by Cambridge University Press (CUP) in The Canadian Entomologist
- Vol. 110 (6) , 633-638
- https://doi.org/10.4039/ent110633-6
Abstract
The overwintering adult of Ooencyrtus kuwanai (How.) is susceptible to freezing. Male adults from New Jersey have a mean supercooling point of −9.6 ± 0.37°C, significantly higher than those from Maine (−12.3 ± 1.08°). Neither group had its cold hardiness increased by exposure to sublethal temperatures. Female adults from New Jersey had a mean supercooling point of −10.8 ± 0.69° when tested after rearing at 22°C, again significantly higher than that of similarly treated female adults from Maine (−15.4 ± 0.90°). Exposure of New Jersey females to sublethal temperatures decreased their supercooling point significantly, to −14.5 ± 1.59°. Maine female adults were not tested after that treatment. No adults survived continuous exposure to 0°C for 30 days. Hence this parasite is apparently incapable of surviving in the current range of the gypsy moth in Canada.This publication has 5 references indexed in Scilit:
- LOW WINTER TEMPERATURES AND THE POTENTIAL FOR ESTABLISHMENT OF THE EGG PARASITE ANASTATUS DISPARIS (HYMENOPTERA: EUPELMIDAE) IN ONTARIO POPULATIONS OF THE GYPSY MOTHThe Canadian Entomologist, 1977
- Recent Developments in Ecology and Control of the Gypsy MothAnnual Review of Entomology, 1974
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- Influence of Gypsy Moth1 Egg Mass Dimensions and Microhabitat Distribution on Parasitizaton by Ooencyrtus kuwanai2Annals of the Entomological Society of America, 1972
- Laboratory and Field Investigations on the Ability of Eggs of the European Pine Sawfly, Neodiprion sertifer (Geoffroy) to Withstand Low Winter TemperaturesThe Canadian Entomologist, 1965