Influence of Elm Spanworm1Oviposition Sites on Parasitism byOoencyrtus clisiocampae2andTelenomus alsophilae3
作者:
John F. Anderson,
Harry K. Kaya,
期刊:
Environmental Entomology
(OUP Available online 1973)
卷期:
Volume 2,
issue 4
页码: 705-711
ISSN:0046-225X
年代: 1973
DOI:10.1093/ee/2.4.705
出版商: Oxford University Press
数据来源: OUP
摘要:
The egg parasitoidsTelenomus alsophilaeViereck andOoencyrtus clisiocampae(Ashmead) suppress populations ofEnnomos subsignarius(Hübner).O. clisiocampaeparasitizes eggs during the foliated period of the year andT. alsophilaeduring the dormant afoliated season. Incidence of parasitism by these two parasitoids in host eggs deposited on boles was similar to that of eggs deposited on undersides of branches.O. clisiocampaewas found to be most abundant in host eggs in the upper portions of the forest. In an area whereO. clisiocampaewas extremely abundant, almost all host eggs were parasitized at all levels of the forest.Parasitism byT. alsophilaewas similar at all levels of a forest whereO. clisiocampaewas not abundant. In a forest whereO. clisiocampaewas moderately abundant, a significant negative correlation was obtained for relationship of eggs parasitized by this parasitoid to those parasitized byT. alsophilae.The immature stages of both parasitoids were highly overdispersed. It should also be noted that the mortality of host eggs by causes other than parasitism was more pervalent in smaller egg masses than in larger ones.
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