Abstract
Cytological effects of four organophosphorus insecticides viz., Dichlorvos, Monocrotophos, Phosalone and Oxydemetonmethyl were tested on Allium cepa root meristems. One hour pulse treatments were given with test solutions at different concentrations and allowed to different recovery periods in Hoagland's nutrient solution.All the four insecticides induced clastogenic and turbagenic effects to different degrees. Among the four insecticides Monocrotophos was observed to be more effective as a clastogenic agent followed by Dichlorvos, Phosalone and Oxydemetonmethyl respectively in that order. The necessity for screening the agrochemicals for their possible mutagenic potentialities that are detriemental to the better economic utilization of plants is suggested.
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