Effects of Natural Enemies and Host Condition on Populations of Insect Pests of Trees
Reagel, Peter
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https://hdl.handle.net/2142/86470
Description
Title
Effects of Natural Enemies and Host Condition on Populations of Insect Pests of Trees
Author(s)
Reagel, Peter
Issue Date
2009
Doctoral Committee Chair(s)
Hanks, Lawrence M.
Department of Study
Entomology
Discipline
Entomology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biology, Entomology
Language
eng
Abstract
In the third chapter, I reviewed the primary and secondary literature on parasitoids of the wood-boring larvae of cerambycid beetles to examine the relationship between the feeding niche of beetles and the number and types of parasitoids that attack them. Significantly fewer species of parasitoids attacked beetle larvae that feed on roots than those that feed within twigs and branchlets, with intermediate numbers of parasitoid species associated with beetles species whose larvae feed in herbaceous stems or the large branches or trunks of woody plants. Of the parasitoid species that attack multiple host species, about half are limited to hosts of a single feeding niche, suggesting that some species of parasitoids may be limited in their ability to parasitize hosts of some niches. The highest rates of parasitism are reported from cerambycid larvae feeding in herbaceous stems. Knowledge of any trends in parasitism might help guide efforts to find biocontrol agents.
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