Relationship between deterrence and toxicity of plant secondary compounds for the alfalfa weevil Hypera brunneipennis |
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Authors: | EA Bernays and M Cornelius |
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Institution: | (1) Department of Entomology, University of Arizona, 85721 Tucson, AZ, USA;(2) Center for Insect Science, University of Arizona, 85721 Tucson, AZ, USA |
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Abstract: | A variety of plant secondary compounds, several of which are quite widespread in nature were tested for their deterrence to the specialist coleopteran Hypera brunneipennis (Boheman) in short-term behavioral assays. The compounds were nicotine, quinine, sparteine, hordenine, linamarin, amygdalin, sinigrin, morin, juglone, chlorogenic acid, digitonin, mimosine, diosgenin, rutin and ursolic acid. Nine of these were then tested for their post-ingestional effects over one to two weeks of adult life, using fecundity as a measure of the effects. In only one case was there any indication of a detrimental effect or any trend suggesting one. The evolutionary implications of these findings are discussed. |
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Keywords: | Deterrence oral dosing toxicity diet breadth Hypera brunneipennis |
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