Ecology of gall-forming Lepidoptera on Tetradymia: I. Gall size and shape
Author AffiliationsHollister Hartman was formerly research assistant with the Population Biology Program, Department of Entomology, University of California, Riverside, is with TRW, Ballistic Missiles Division, P.O. Box 1310, San Bernardino, CA 92402.
Hilgardia 52(3):1-16. DOI:10.3733/hilg.v52n03p016. February 1984.
Multiway analysis of covariance revealed ecological determinants of gall morphology operating hierarchically, with plant effects primary, insect effects secondary, and habitat effects tertiary. Plant effects included Tetradymia DC. (Asteraceae) species identity, timing and duration of growth pulses, and differential vegetation quality among height striata. Insect effects included a numerical response in gall density and a functional response in individual feeding duration and intensity. Alterations in Gnorimoschema tetradymiella Busck 1903 (Lepidoptera: Gelechiidae) feeding caused by parasitization created parasitoid-specific gall sizes. Habitat effects indexed by topographic and climatic features operated most strongly in relatively southern latitudes.
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Also in this issue:Steering a course to farmland protection
Perspective: Statewide farmland protection is fragmented, limited
Urban growth squeezes agriculture
Conflicts arise on the urban fringe
Views in the Suisun Valley: Rural dwellers divided on how to head off urbanization
North Bay leads Central Valley in protecting farmland
Ecology of gall-forming Lepidoptera on Tetradymia: II. Plant stress effects on infestation intensity
Permissive growth policies may encourage speculative investment in farmland
Land trusts conserve California farmland
Ecology of gall-forming Lepidoptera on Tetradymia: III. Within-plant horizontal and vertical distribution
Fungal pathogen controls thrips in greenhouse flowers
Legumes show success on Central Coast rangeland