Some chemical bases for gypsy moth,Lymantria dispar,larval rejection of green ash,Fraxinus pennsylvanica,foliage as food |
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| Authors: | Ingrid Markovic Dale M Norris Miodrag Cekic |
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| Affiliation: | (1) Department of Entomology, University of Wisconsin, 53706 Madison, Wisconsin;(2) Department of Physics, University of Wisconsin, 53706 Madison, Wisconsin;(3) Present address: Laboratory for Theoretical and Physical Biology, NIH, 20892-1855 Betheseda, Maryland;(4) Present address: Fusion Systems Corporation, 20878-1357 Gaithersburg, Maryland |
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| Abstract: | Green ash is one of the few tree species rejected as food by larvae of the generalist gypsy moth,Lymantria dispar L. (Lepidoptera: Lymantriidae). Such rejection is based especially on chemicals present in green ash foliage. The gypsy moth larval feeding-inhibitory activity is contained in the ethyl acetate extractables of green ash foliage. Three representative columnchromatographed fractions of the extractables contained antifeedant activity. Individual fractions showed weaker antifeedant activity compared to the total ethyl acetate extractables. Acid hydrolysis of the extractables destroyed antifeedant activity and yielded feeding stimulant activity at higher concentrations. The aqueous extractables were not feeding-inhibitory. Compounds in the green ash extractables were separated by TLC, HPLC, CC, and GC. |
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| Keywords: | Gypsy moth green ash feeding inhibition Lymantria dispar Lepidoptera Lymantriidae Fraxinus pennsylvanica Oleacae |
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