Persistency of bioactive fractions of Indian plant, Polygonum hydropiper as an insect feeding deterrent.
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.
Tripathi
A K
AK
Genetic Resources and Biotechnology Division, Central Institute of Medicinal and Aromatic Plants, India.
Jain
D C
DC
Singh
S C
SC
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
D010936:Plant Extracts