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1	RESPONSES OF THE CATALPA SPHINX, CERATOMIA CATALPAE, AND ITS PRIMARY PARASITOID, COTESIA CONGREGATA, TO VARYING LEVELS OF IRIDOID GLYCOSIDES IN CATALPA Bray, Jessica L 01 January 2015 (has links) The catalpa sphinx, Ceratomia catalpae, is a specialist on Catalpa trees, which produce iridoid glycosides (IGs). Whereas some trees are defoliated every year, others escape herbivory. Caterpillar populations are either heavily parasitized by the braconid wasp, Cotesia congregata, or remain unparasitized. We hypothesized that these patterns could be explained by variable IG concentrations among trees and insect responses to these chemicals. IG concentrations varied among trees. Percent defoliation was positively related to IG concentration. In comparisons of insect responses to relatively high or low IG concentrations, moths preferred to oviposit on trees with high IG concentrations. Caterpillars did not display a feeding preference nor did wasps differ in searching responses to leaf discs with high or low IG concentrations. Results indicate that observed patterns of herbivory can be explained by moth oviposition preferences for trees with high IG concentrations. Catalpa Catalpa sphinx Ceratomia catalpae Cotesia congregata Iridoid glycosides Sphingidae Behavior and Ethology Entomology
2	MECHANISMS OF SUCCESS: PLANT-HERBIVORE INTERACTIONS AND THE INVASION OF NON-NATIVE LONICERA SPECIES IN NORTH AMERICA Lieurance, Deah January 2012 (has links) No description available. Ecology Environmental Studies Lonicera maackii Lonicera reticulata Enemy Release Hypothesis Zaraea inflata tolerance resistance herbivory secondary metabolites iridoid glycosides phenolic compounds common garden

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RESPONSES OF THE CATALPA SPHINX, CERATOMIA CATALPAE, AND ITS PRIMARY PARASITOID, COTESIA CONGREGATA, TO VARYING LEVELS OF IRIDOID GLYCOSIDES IN CATALPA

MECHANISMS OF SUCCESS: PLANT-HERBIVORE INTERACTIONS AND THE INVASION OF NON-NATIVE LONICERA SPECIES IN NORTH AMERICA