✦ LIBER ✦

Persistency of bioactive fractions of Indian plant, Polygonum hydropiper as an insect feeding deterrent

✍ Scribed by A. K. Tripathi; D. C. Jain; S. C. Singh

Book ID: 101290458
Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 36 KB
Volume: 13
Category: Article
ISSN: 0951-418X
DOI: 10.1002/(sici)1099-1573(199905)13:3<239::aid-ptr437>3.0.co;2-4

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✦ Synopsis

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 (EC 50 ) 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.