• Effect of sublethal doses of dichlorvos and carbaryl on the nervous system ofPericallia ricini Fabr. (Lepidoptera: Arctidae)

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    • Keywords


      Pericallia ricini ; sublethal doses of insecticides; histopathology of nervous system

    • Abstract


      Topical application and injection of various doses of dichlorvos and carbaryl to the fourth instar larvae ofPericallia ricini did not alter the normal differentiation of various centres of the brain during metamorphosis but certain changes were produced in the neurons and neurites. These changes included the thickening of the neurilemma, clumping of chromatin, disintegration of cells and swelling of nuclei. The neurilemma of treated larvae became wavy, remained as such till the early adult stage and then degenerated for a very short period. The optic lobe anlagen cells exhibited increased mitotic division.

    • Author Affiliations


      Y N Singh1 F Shaheen1

      1. Department of Zoology, University of Allahabad, Allahabad - 211 002, India
    • Dates


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