Carbaryl resistance in populations of grape berry moth (Lepidoptera: Tortricidae) in New York and Pennsylvania.

Sudha Nagarkatti, Patrick C. Tobin, Andrew J. Muza, Michael C. Saunders

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

We collected grape berry moth, Endopiza viteana (Clemens) (from cultivated and wild Vitis along Lake Erie in Pennsylvania and New York), and measured carbaryl susceptibility in first instars. A model of susceptibility was based on the concentration-mortality curve of laboratory-maintained colonies originating from wild Vitis with no prior history of carbaryl exposure, and a noncommercial vineyard with modest previous exposure to carbaryl. We estimated LC50 and LC90 for susceptible grape berry moth larvae at 45.4 and 2319 microg/ml, respectively. Bioassays on field-collected larvae from commercial vineyards in both states, where grape growers were abiding by current pest management guidelines for carbaryl use, revealed carbaryl resistance ratios from 7 to 71 at the LC50 level. With the loss or restriction of alternative chemical control tactics in the Food Quality Protection Act era, resistance management programs for grape berry moth should be immediately developed and implemented to regain the efficacy of this once effective insecticide and other related chemical compounds.

Original languageEnglish (US)
Pages (from-to)1027-1032
Number of pages6
JournalJournal of economic entomology
Volume95
Issue number5
DOIs
StatePublished - Oct 2002

All Science Journal Classification (ASJC) codes

  • Ecology
  • Insect Science

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