A Study of Insecticidal Effects of Leaf Extracts of Aegle marmelos L. Correa and Ricinus communis L. on Callosobruchus chinensis L

Abstract

Laboratory experiments were conducted to evaluate the efficiency of leaf powders of Aegle marmelos and Ricinus communis against the pulse beetle, Callosobruchus chinensis. which infests stored pulse seeds. Stored pulses are primarily attacks by major insect pest particularly the pulse beetle, Callosobruchus chinensis. Though chemicals provide effective control of Callosobruchus sp., but the efficiency of the chemicals mostly depends on the mode of exposure. The maximum effectiveness is given when the insecticides are provided by gustatory a method, but majority of these are toxic to human. Stored product to be many synthetic insecticides have been found effective against pests, but proved to be hazardous to men and domestic animals. These chemical compounds pose a serious risk to human health, so these chemical compounds should note used in stored pulses that are consumed. The over reliance on and non judicious use of synthetic pesticides, especially insecticides since last four decades led to wide the spectrum of pests resistance to chemicals, resurgence an of pests, Pulse beetles cause losses of more than 50% of protected grains, control of which generally depends on synthetic bio pesticides involving fumigants, this result in residual and unintended contamination of food and soil which can prove hazardous to human and animal health. The extracts of the different fraction of bio insecticides may play a key role in troublesome insect pests controlling program in nearing time to come. The leaves of the plants Aegle marmelos and Ricinus communis have proven to be well effective for the control of Callosobruchus chinensis, by using methanol and chloroform solvents.