title: Sweetclover-weevil feeding deterrent B: isolation and identification.
abstract: Deterrent B, a compound apparently involved in the resistance of Melilotus infesta to the sweetclover weevil Sitona cylindricollis, has been isolated from leaves by a combination of preparative paper chromatography, sublimation, and crystallization. The compound has been identified as ammonium nitrate. Isolated deterrent B and ammonium nitrate have identical feeding deterrent activities. Although the deterrent principle was isolated as the ammonium salt, nitrate ion is probably responsible for the deterrent activity in vivo.
authors.forename: W R
authors.initials: WR
authors.lastname: Akeson
authors.forename: F A
authors.initials: FA
authors.lastname: Haskins
authors.forename: H J
authors.initials: HJ
authors.lastname: Gorz