COMPARATIVE TOXICOLOGICAL EFFECTS OF AZADIRACHTA INDICA EXTRACTS AND CYPERMETHRIN AND THEIR EFFECTS ON PUPATION AND ADULT EMERGENCE AGAINST MUSCA DOMESTICA L.

To investigate the effects of cypermethrin and neem extracts a series of concentration i.e., 0.0312%, 0.0625%, 0.125%, 0.25%, 0.5%, 1.0% and 0.04%, 0.08%, 0.16%, 0.32%, 0.64%, 1.285% respectively, were given to houseflies (Musca domestica) adults and third instar larvae. Treated larvae were keenly observed and kept separately according to their varying levels of concentrations. The treated larvae were suffering from different teratological effects respective to their increasing concentration levels. The adult female flies were suffering from the effects on reproductive potential. Inhibition in reproduction showed the inhibitory response of the neem extracts in the houseflies. Adult emergence values were changing in accordance with the increase in concentration of neem extracts. The lowest concentration posed very minute effects on adult emergence, whilst comparatively higher doses remarkably decreased the rate of adult emergence. Similarly higher doses of cypermethrin considerably decreased the rate of adult emergence in house flies. LD50 values of cypermethrin were 0.0249µg/insec. The LD50 values of the extracts of Azadirachta indica were found to be 8.0µg/insect. The extracts of Azadirachta indica were found to be active in terms of insecticidal potential and exhibited pronounced effects on growth, pupation and on adult emergence.