Showing papers on "Aphanamixis published in 1994"

Laboratory evaluation of toxic and repellent properties of the pithraj tree, Aphanamixis polystachya Wall & Parker, against Sitophilus oryzae (L.)

Abstract: Crude seed extracts of pithraj, Aphanamixis polystachya were evaluated fortheir repellency, feeding deterrency, contact toxicity and oviposition deterrency to rice weevils. The extracts had strong repellent and feeding deterrent effects on rice weevils. Pithraj seed extracts were moderately toxic to rice weevils. An ethanol extract was the most toxic of four extracts tested and showed the lowest LD50 and LT50 values. The ground leaves, bark and seeds at a 2.5% ratio provided good protection for rice grains by reducing the F1 progeny emergence and the grain infestation rates.