S.S. Modarres Najafabadi, E. Beiramizadeh, R. Zarei
Department of Entomology, Agriculture and Natural Resources Research Center, Arak, Iran
Faculty of Ornamental Plants Research Institute, Mahallat, Iran
Faculty of Payame Noor University, Mahallat Branch, Iran
Key words: Azadirachta indica, Mentha longifolia, Datura stramonium, Oryzaephilus surinamensis, Tribolium castaneum.
Screening of plant extracts from wild species of plants for insecticidal properties could lead to the discovery of new agents for pest control. Keeping this in view, the ethanolic extracts of three plants leaves Neem (Azadirachta indica), Mint (Mentha longifolia) and Datura (Datura stramonium) were tested against two stored grain pests viz., Oryzaephilus surinamensis L. and Tribolium castaneum Herbst. The results revealed that all of the tested materials had repellent and lethal effects against the tested pests as compared to untreated check. The plant extracts were mixed with grain 10mg/g of grains. Comparison of test plant extracts on O. surinamensis showed that the Mint extract was the most effective causing 48.30±4.01 mortality percent. Datura and Neem extracts with 35.26±3.21 and 25.60±2.33 mortality percent were the next levels. But, the plant extracts effect on T. castaneum revealed that Datura, Neem and Mint extracts were the most effective with 21.42±2.31, 16.66±1.54 and 15.95±1.89 mortality percent, respectively. Present study also revealed that all the treatments significantly deterred/repelled the tested insects. Datura extract showed maximum repellency of 33.09±2.35% against O. surinamensis. Mint extract showed maximum repellency of 59.52±4.12% against T. castaneum. The results of thin layer chromatography (TLC) also showed that four components were detected in Mint extract and three components in Datura and Neem were detected respectively in the ethanol extractive.
Get the original articles in Source: Volume 4, Number 6, June 2014 – JBES
Published By: International Network for Natural Sciences