PJB-2005-20
SCREENING OF PLANT LEAVES AS GRAIN PROTECTANTS AGAINST TRIBOLIUM CASTANEUM DURING STORAGE
TOOBA HAQ, N. F. USMANI AND TAHIR ABBAS
Abstract
Many species of plants have potential to be utilized as medicinal and therapeutic agents, not only for the treatment of various diseases of man and animals but can also be used as insect control agents for various stored grains. Present work has been focussed to assess the repellency and toxicity of some medicinal plants immune to insect attack. Response varied with plant materials, insect species and exposure time. The potential of leaves of five plants viz., Eucalyptus, Bougainvillea glabra, Azadirachta indica, Saraca indica and Ricinus communis, were selected as grain protectants against insect infestation. Forty five days storage of wheat grain samples were tested with 5% (by weight) of above mentioned selected test leaves which showed 78% to 76% of repellency against Tribolium castaneum insect as compared to the control samples of wheat grain without test leaves.
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