About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in CS

  1. Vol. 8 No. 5, p. 574-576
     
    Received: Mar 15, 1968


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2135/cropsci1968.0011183X000800050020x

Water-soluble Factors in Melilotus Leaves Which Influence Feeding by the Sweetclover Weevil1

  1. W. R. Akeson,
  2. F. A. Haskins,
  3. H. J. Gorz and
  4. G. R. Manglitz2

Abstract

Abstract

One factor which stimulates feeding and two factors which deter feeding by the adult sweetclover weevil have been separated by preparative paper chromatography of hot water extracts of Melilotus leaves. The factors were detected with a bioassay which measures feeding by adult weevils on sweetclover root disks impregnated with the extract or fraction being tested. A feeding stimulant (Stimulant A) and a feeding deterrent (Deterrent A) were found in both the resistant species, M. infesta, and a susceptible species, M. officinalis, in approximately equal amounts. A second feeding deterrent (Deterrent B) was found only in extracts from M. infesta. All available evidence suggests that Deterrent B is the factor primarily responsible for the resistance of M. infesta to the sweeetclover weevil.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .