Section 15
Chapter 14,508

Histopathological effects of insecticides on the midgut of the Egyptian cotton leafworm, Spodoptera liitoralis

Toppozada, A.; Salama, A.E.; Eldefrawi, M.E.; Zeid, M.

Annals of the Entomological Society of America 61(5): 1326-1333


ISSN/ISBN: 0013-8746
Accession: 014507369

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The following is virtually the authors' abstract In tests in Egypt, contact or oral uptake of carbaryl, parathion, DDT or endrin was found to cause considerable cytopathological changes in the midgut epithelium of larvae of Spodoptera littoralis (Boisd.). No qualitative difference occurred with the two routes of application or with the different insecticides. The external and cytological symptoms appeared more rapidly when the larvae were poisoned orauy. As the external toxicity symptoms advanced, it was found that several cytological changes progressed in the midgut, comprising continuous elongation of epithelial cells, vacuolation, fading of cell boundaries, chromatin clumping or lysis, shedding of cytoplasm and degeneration of cells. There was a definite synchronisation between the external toxicity symptoms and the pathological effect on the midgut epithelium.

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