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J Econ Entomol

Title:		Jasmonic acid induced resistance in grapevines to a root and leaf feeder
Author(s):		Omer AD; Thaler JS; Granett J; Karban R;
Address:		"Department of Entomology, University of California, Davis 95616, USA"
Journal Title:		J Econ Entomol
Year:		2000
Volume:		93
Issue:		3
Page Number:		840 - 845
DOI:		10.1603/0022-0493-93.3.840
ISSN/ISBN:		0022-0493 (Print) 0022-0493 (Linking)
Abstract:		"We investigated the effects of induced resistance to the folivore Pacific spider mite, Tetranychus pacificus McGregor (Acari: Tetranychidae), as well as the root-feeding grape phylloxera Daktulosphaira vitifoliae (Fitch) (Homoptera: Phylloxeridae) in grapevines using exogenous applications of the natural plant inducer, jasmonic acid. Foliar jasmonic acid application at concentrations that caused no phytotoxicity significantly reduced the performance of both herbivores. There were less than half as many eggs produced by spider mites feeding on the induced leaves compared with control grapevine leaves. Induction reduced the numbers of phylloxera eggs and nymphal instars by approximately threefold and twofold, respectively, on induced compared with control grapevine roots. The negative demographic effects of jasmonic acid application appeared to be caused by changes in fecundity for the Pacific spider mite, and possibly changes in development rate and fecundity for grape phylloxera"
Keywords:		Animals *Cyclopentanes Insect Control/*methods *Insecta *Mites Oxylipins Plant Leaves Plant Roots *Rosales Tick Control/*methods;
Notes:		"MedlineOmer, A D Thaler, J S Granett, J Karban, R eng Research Support, U.S. Gov't, Non-P.H.S. England 2000/07/21 J Econ Entomol. 2000 Jun; 93(3):840-5. doi: 10.1603/0022-0493-93.3.840"