Biology and Host Specificity of Trirhabda bacharidis (Coleoptera: Chrysomelidae) on Baccharis (Asteraceae: Astereae)
| Autor: | Paul E. Boldt |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Larva
Ecology ved/biology Baccharis fungi ved/biology.organism_classification_rank.species Biological pest control food and beverages Biology biology.organism_classification Shrub Baccharis halimifolia Baccharis neglecta Insect Science Botany Astereae Ecology Evolution Behavior and Systematics Leaf beetle |
| Zdroj: | Environmental Entomology. 18:78-84 |
| ISSN: | 1938-2936 0046-225X |
| DOI: | 10.1093/ee/18.1.78 |
| Popis: | The leaf beetle Trirhabda bacharidis (Weber) is the dominant herbivore of the woody shrub Baccharis neglecta (Britt.) in central Texas. Eggs were deposited in clusters on the base of the main stem of the plant from April to June and remained dormant for 7–10 mo. In 1984 and 1985, mean populations of 91 and 572 neonate larvae per plant, respectively, were found in late winter from eggs deposited on the base of main stems. Larvae often defoliated the plant. Mature larvae dropped or crawled to the ground in March and April and pupated in the soil. Mean adult populations of 154 and 239 beetles per plant emerged in April 1984 and 1985, respectively; they also defoliated some plants. Laboratory reared females deposited a mean of 517 eggs each. Host specificity tests were conducted with larvae of T. bacharidis on 12 species of Asteraceae. Mean larval consumption was 1,915, 1,162, 692, and.678 mm2 of leaf tissue per larva on Baccharis halimifolia L., B. neglecta , B. sarothroides Gray, and B. pilularis DC., respectively. Larval development required 26–29 d. Adults were tested on seven species of Baccharis ; they preferred the same four plants as did the larvae. Larval and adult consumption, pupal weight, and adult longevity were greatest on B. halimifolia . |
| Databáze: | OpenAIRE |
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