Journal of Pesticide Science
Online ISSN : 1349-0923
Print ISSN : 1348-589X
ISSN-L : 0385-1559
Ultrastructural effects of pyridalyl, an insecticidal agent, on epidermal cells of Spodoptera litura larvae and cultured insect cells Sf9
Shigeru SaitoTakafumi YoshiokaKimitoshi Umeda
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2006 Volume 31 Issue 3 Pages 335-338


The ultrastructural effects of pyridalyl on the epidermal cells of S. litura larvae and cultured Sf9 cells were observed. In epidermal cells, hydropic degeneration containing swollen mitochondria, dilated rough endoplasmic reticulum, dilated Golgi apparatus, shrunken nuclei and increase of unidentified clear granules appeared 6 hr after treatment. In Sf9 cells, swelling of mitochondria was observed 4–6 hr after treatment, and then the cells finally entered hydropic degeneration. Since the time course of such ultrastructural changes was parallel to that of poisoning symptoms in the larvae, these effects were thought to be related with insecticidal action.

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© 2006 Pesticide Science Society of Japan
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