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Journal of Chemical Ecology

, Volume 7, Issue 2, pp 273–284 | Cite as

Aphid feeding deterrents in sorghum

Bioassay isolation and characterization
  • David L. Dreyer
  • John C. Reese
  • Kenneth C. Jones
Article

Abstract

Improvements in a synthetic diet for use in a bioassay to screen for feeding deterrents againstSchizaphis graminum, greenbug, are reported. Feeding on the synthetic diet was highly pH dependent with maximum feeding occurring at about pH 8.0. The bioassay was used as a guide in the isolation of feeding deterrent substances from aphid-resistant lines of sorghum (Sorghum bicolor). The major greenbug feeding deterrents isolated from sorghum leaves wereP-hydroxybenzaldehyde (ED50 0.13%), dhurrin (ED50 0.16%), and procyanidin (ED50 0.08%).

Key words

Schizaphis graminum Homoptera Aphididae greenbugs Sorghum bicolor feeding deterrents bioassay aphids host plant resistance p-hydroxybenzaldehyde dhurrin procyanidin luteolin-7-glucoside 

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Copyright information

© Plenum Publishing Corporation 1981

Authors and Affiliations

  • David L. Dreyer
    • 1
  • John C. Reese
    • 1
  • Kenneth C. Jones
    • 1
  1. 1.U.S. Department of Agriculture Science and Education AdministrationWestern Regional Research CenterBerkeley

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