Effect of Thuringiensin on Cuticle Development of Immature Stages of Tetranychus UrticaeKoch. (Acarina: Tetranychidae)

The effect of thuringiensin on the ultrastructure of Tetranychus urticae Koch cuticle was studied using an transmission electron microscope (TEM). Thuringiensin was found to affect epicuticle synthesis in larvae, protonymphs and deutonymphs. Its disruptive effects on larval cuticle formation were ob...

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Bibliographic Details
Published inAgricultura técnica Vol. 62; no. 2
Main Authors Vargas, Robinson, Chapman, Bruce, Penman, David R
Format Journal Article
Published Chile Instituto de Investigaciones Agropecuarias, INIA 12.11.2002
Subjects
cuticle
cutícula
Tetranychus urticae
thuringiensin
β -exotoxin
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Summary:The effect of thuringiensin on the ultrastructure of Tetranychus urticae Koch cuticle was studied using an transmission electron microscope (TEM). Thuringiensin was found to affect epicuticle synthesis in larvae, protonymphs and deutonymphs. Its disruptive effects on larval cuticle formation were observed from 12 h onwards, indicating that the effect of the exposure time of mites to thuringiensin is related to the stage of cuticle development. The results suggest that the effects of thuringiensin occur in a relatively short time.
ISSN:0365-2807