title: Toxicity of nitro compounds fromLotus pedunculatus to grass grub (Costelytra zealandica) (Coleoptera: Scarabaeidae).
abstract: Crude extracts of root of the forage legumesLotus pedunculatus andCoronilla varia (crownvetch) were toxic when administered orally to 3rd instarCostelytra zealandica larvae. A group of 3-nitropropanoyl-D-glucopyranoses was isolated from active fractions of the crude extracts. These toxins, some of which were already known fromC. varia, have not previously been reported fromL. pedunculatus. The compounds were present in root tissue of this species at a concentration of about 1% dry weight. They include the triester karakin and the diesters coronarian and cibarian, all of which were toxic to larvae ofC. zealandica at levels which could account fully for the activity of the crude extracts.
authors: Entomology Division, Department of Scientific and Industrial Research, Private Bag, Auckland, New Zealand.
authors: R F
authors: RF
authors: Hutchins
authors: O R
authors: OR
authors: Sutherland
authors: C
authors: C
authors: Gnanasunderam
authors: W J
authors: WJ
authors: Greenfield
authors: E M
authors: EM
authors: Williams
authors: H J
authors: HJ
authors: Wright