Effectiveness of lufenuron (CGA-184699) and diofenolan (CGA-59205) on the general body metabolism of the red palm weevil, Rhynchophorus ferrugineus (Curculionidae: Coleoptera)
2003
Ghoneim, K.S. | Al-Dali, A.G. | Abdel-Ghaffar, A.A. (Al-Azher Univ., Cairo (Egypt). Faculty of Science)
In the present study, prepupae of the red palm weevil Rhynchophorus ferrugineus were topically treated with a dose of 1.0, 0.1 or 0.01 mug Lufenuron or Diofenolan/insect. The main body metabolites, carbohydrates, proteins and lipids, were determined during the pupal stage. The lowest dose of Lufenuron or Diofenolan caused a gradual decrease in carbohydrate content, but the highest and medium doses induced a reciprocal V-shaped trend in this metabolite throughout the pupal life. The higher two dose-levels of Diofenolan and all dose-levels of Lufenuron, induced such trend in protein content of pupae. The available results indicated a greater reducing action on protein content of Lufenuron than of Diofenolan. In connection with the lipids, the higher two dose-levels of each acylurea suppressed and then stimulated, the content of this metabolite along the pupal stage. In other words, these IGRs reduced the lipid content at the two limits of the pupal stage, but enhanced the pupae to lipid increments at all mostly the mid-stage.
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