Plumbagin-induced ultrastructural haemocytic response of Dysdercus koenigii F

The phytochemical plumbagin, isolated from Plumbago zeylanica L., was applied in 2 and 5 microliter doses of 0.1% concentration on the surface of Dysdercus koenigii F. adults and its effect on the haemocytes of the bug, studied by transmission electron microscopy. All the five haemocyte types viz. t...

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Bibliographic Details
Published inInsect science and its application Vol. 13; no. 6; pp. 787 - 791
Main Authors Tikku, K, Saxena, B.P, Satti, N.K, Suri, K.A
Format Journal Article
LanguageEnglish
Published 1992
Subjects
Dysdercus koenigii
growth retardation
hemocytes
inhibitors
insecticidal properties
insecticide resistance
mortality
plant extracts
plant pests
Plumbago zeylanica
ultrastructure
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Summary:The phytochemical plumbagin, isolated from Plumbago zeylanica L., was applied in 2 and 5 microliter doses of 0.1% concentration on the surface of Dysdercus koenigii F. adults and its effect on the haemocytes of the bug, studied by transmission electron microscopy. All the five haemocyte types viz. the prohaemocyte, plasmatocyte, granular haemocyte, oenocytoid, and the adipohaemocyte are affected within a period of 24-48 hr. The effect begins with an acute state of vacuolization of the cells and a gradual destruction of the organelles, followed by dissolution of the plasma membrane and passing out of the internal organelles, like the mitochondria and the endoplasmic reticulum. This phenomenon is responsible for a consistent elimination of the haemocytes from the blood, leading to lowering of the resistance and mortality of the insects.
ISSN:0191-9040