Plant age and attack by the bud galler,Euura mucronata |
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| Authors: | P W Price H Roininen J Tahvanainen |
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| Institution: | (1) Department of Biological Sciences, Northern Arizona University, 86011 Flagstaff, AZ, USA;(2) Department of Biology, University of Joensuu, SF-80101 Joensuu 10, Finland;(3) Museum of Northern Arizona, 86001 Flagstaff, AZ, USA |
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| Abstract: | Summary As ramets of the willow, Salix cinerea L. (Salicaceae) aged shoot length decreased in the six populations studied in S.E. Finland. Many traits correlated positively with shoot length: basal diameter, number of internodes, internode length, leaf size, and length of growing period. The bud-galling sawfly, Euura mucronata (Hartig) Man. (Churchill) (Hymenoptera: Tenthredinidae), responded positively to shoot length or correlated traits, and negatively to ramet age in three forest populations. This herbivore attacked the most vigorous plants in a population, and numbers of attacks declined as ramets aged and senesced. The generality of this kind of herbivore response to plant quality is emphasized. |
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| Keywords: | Euura mucronata Bud galler Herbivore Plant age Salix cinerea |
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