Effect of four benzoylphenyl ureas (BPUs) on the cuticular chitin, protein formation and electrophoretic profile of sixth-instar larvae of Spodoptera littoralis (Boisd.)
1993
Emam, A.K. (Ain Shams Univ., Cairo (Egypt). Faculty of Agriculture. Dept. of Plant Protection) | Degheele, D.
The cuticle of diflubenzuron-, triflumuron-, teflubenzuron-, or chlorfluazuron-treated larvae of Spodoptera littoralis weighed less than that of the control. However, the dry weight of the cuticle of larvae treated with diflubenzuron or triflumuron was comparable; this was also the case in chlorfluazuron- and teflubenzuron-treated larvae. Chitin production was nearly blocked one day after feeding with a BPU; no significant difference in chitin content was observed with the various compounds. BPUs apparently affect the production of all cuticular proteins; electrophoretic assays indicated that similar patterns of protein-content were observed in treated and untreated larvae but at a lower concentration in the treated ones.
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