« Previous AbstractManagement of Navel Orangeworm (Lepidoptera: Pyralidae) Using Four Commercial Mating Disruption Systems in California Almonds    Next AbstractControl of Carbon Assimilation and Partitioning by Jasmonate: An Accounting of Growth-Defense Tradeoffs »

Oecologia

Title:		Effects of elicitation treatment and genotypic variation on induced resistance in Populus: impacts on gypsy moth (Lepidoptera: Lymantriidae) development and feeding behavior
Author(s):		Havill NP; Raffa KF;
Address:		"Department of Entomology, University of Wisconsin, Madison, WI 53706, USA e-mail: raffa@entomology.wisc.edu, Fax: +1-608-2623322, , , , , , US"
Journal Title:		Oecologia
Year:		1999
Volume:		120
Issue:		2
Page Number:		295 - 303
DOI:		10.1007/s004420050861
ISSN/ISBN:		1432-1939 (Electronic) 0029-8549 (Linking)
Abstract:		"We examined the effects of various wounding treatments and genotypic variation on induced resistance in Populus (Salicales: Salicaceae) against herbivory by the gypsy moth, Lymantria dispar L. (Lepidoptera: Lymantriidae). Second-instar larvae grew and consumed less on leaves from induced than non-induced trees. Likewise, larvae preferred leaf disks from non-induced trees. Among induction treatments, gypsy moth feeding had the strongest and most consistent effect in behavioral choice tests. Mechanical wounding of leaves and mechanical wounding plus application of gypsy moth regurgitant had intermediate effects, while application of jasmonic acid had the weakest overall effect. Under no-choice conditions, there were no consistent trends across clones in the ability of various treatments to elicit plant responses affecting the herbivore. Levels of constitutive and inducible resistance to herbivory varied significantly among 12 Populus clones. Larvae grew up to 30-fold more, and consumed up to 250-fold more on the most suitable than the least suitable clone. Prior feeding by gypsy moths reduced larval feeding up to 71.4% on the most highly inducible clone, but it had little or no effect for the least inducible clones. There was no evidence for a relationship between levels of inducible and constitutive resistance, or between inducible resistance and phylogenetic relatedness among clones. We discuss implications for the ecology and evolution of plant-insect interactions and the management of insect pests"
Keywords:		Genotypic variation Herbivory Key words Induced resistance Lymantria dispar Populus;
Notes:		"PubMed-not-MEDLINEHavill, Nathan P Raffa, Kenneth F eng Germany 1999/08/01 Oecologia. 1999 Aug; 120(2):295-303. doi: 10.1007/s004420050861"