title: Persistency of bioactive fractions of Indian plant, Polygonum hydropiper as an insect feeding deterrent.
abstract: An improved extraction procedure resulted into a six-fold yield of bioactive fraction than the usual extraction method with a high per cent of feeding deterrence against 3rd instar larvae of Spilarctia obliqua and Spodoptera litura. The effective concentration (EC50) of PH-2 was 4321 and 4155 ppm against the two insects. No loss in feeding deterrency was recorded when the bioactive ether fraction, PH-2 was exposed to sunlight for 6 h.
authors.affiliation: Genetic Resources and Biotechnology Division, Central Institute of Medicinal and Aromatic Plants, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Tripathi
authors.forename: D C
authors.initials: DC
authors.lastname: Jain
authors.forename: S C
authors.initials: SC
authors.lastname: Singh
mesh_terms: D000818:Animals; D005247:Feeding Behavior / Q000187:drug effects*; D007313:Insecta / Q000187:drug effects* / Q000196:embryology / Q000502:physiology; D007814:Larva / Q000187:drug effects; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D019664:Polygonaceae / Q000737:chemistry*; D013472:Sunlight
chemical_list: D010936:Plant Extracts