Efficacy of extracts of Thuja orientalis, Pistacia khinju and Juglans regia against Tribolium confusum and Oryzaephilus surinamensis Veysi Nahid, Ravan Sultan* Department of Plant Protection, Faculty of Agriculture, University of Zabol, Zabol, Iran *Corresponding author Email: eyidozehi@gmail.com
Online published on 5 February, 2019. Abstract Due to environmental hazards of chemical insecticides, plant products are gaining significance, even in stored product pests. The present study evaluates the effects of fruit extract of Thuja orientalis, green husks extract of Pistacia khinjuk, leaves and leaf extract of Juglans regia. Evaluation was done with adults of Tribolium confusum and Oryzaephilus surinamensis (27±1°C and 65±5%RH). Extraction was performed using methanol and contact toxicity tests revealed significant differences in the mortality, and it increased with concentration of the extract. Methanol extract of the green husks Juglans regia was observed to be the most toxic on O. surinamensis. The LC50 values obtained with the extracts against T. confusum and O. surinamensis are provided. Top Keywords Plant extracts, stored product pests, adults, contact toxicity, bioassay, LC50, methanol extracts, leaves, husks, fruits. Top |