caa a22 4500 388093161 CHVBK 20180307125257.0 cr unu---uuuuu 161130e199912 xx s 000 0 eng 10.4039/Ent131801-6 doi S0008347X00011202 pii (NATIONALLICENCE)cambridge-10.4039/Ent131801-6 PERFORMANCE OF TRIRHABDA VIRGATA (COLEOPTERA: CHRYSOMELIDAE) ON THREE POTENTIAL HOSTS [Elektronische Daten] The suitability of three potential host plants, Solidago canadensis L. var. canadensis (Asteraceae), Solidago graminifolia (L.) Salisb., and Aster lateriflorus L. (Asteraceae), for the goldenrod beetle, Trirhabda virgata LeConte was determined by measuring several fitness components during the T. virgata life cycle. Neonate larvae were collected from S. canadensis plants and transplanted onto S. canadensis, S. graminifolia, and A. lateriflorus and maintained in field enclosures until the last instar was reached. Once brought into the laboratory, larvae were fed their assigned host plant until pupation. Following emergence, adults were weighed and separated into mating pairs to record oviposition and longevity. Eggs were kept in the laboratory until the following spring, when first instar larvae were taken into the field and re-established on their assigned host, and the experiment was repeated for 2 years. Larval survival and rate of development was not affected by the host plant. Mean weight of adults at emergence was greater on S. canadensis than on either S. graminifolia or A. lateriflorus. Two components of adult fitness, postmating longevity and realized fecundity, were measured. Longevity of adult female T. virgata was not affected by the host plant. Fecundity of T. virgata reared on A. lateriflorus and S. graminifolia was lower than the fecundity of females reared on S. canadensis. These results are consistent with the hypothesis that both intrinsic plant quality and the mobility of the foraging stage are important in the evolution of host range in T. virgata. These experiments were repeated over a 3-year period, using offspring from the survivors of the previous year for the 2nd and 3rd years. Over this time, individuals experienced "laboratory adaptation," and both accepted and increased their performance on previously unacceptable food plants. Copyright © Entomological Society of Canada 1999 Blatt S.E. Department of Biology, Queen's University, Kingston, Ontario, Canada K7L 3N6 Schindel A.M. Department of Biology, Queen's University, Kingston, Ontario, Canada K7L 3N6 Harmsen R. Department of Biology, Queen's University, Kingston, Ontario, Canada K7L 3N6 The Canadian Entomologist Cambridge University Press 131/6(1999-12), 801-811 0008-347X 131:6<801 1999 131 TCE https://doi.org/10.4039/Ent131801-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent131801-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Blatt S.E. Department of Biology, Queen's University, Kingston, Ontario, Canada K7L 3N6 NATIONALLICENCE 700 1- Schindel A.M. Department of Biology, Queen's University, Kingston, Ontario, Canada K7L 3N6 NATIONALLICENCE 700 1- Harmsen R. Department of Biology, Queen's University, Kingston, Ontario, Canada K7L 3N6 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 131/6(1999-12), 801-811 0008-347X 131:6<801 1999 131 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge