Year: Volume: 6 Issue: 13 Page No.
Ghoneim , A. Al-Dali and A. Abstract: In the present study, prepupae of the red palm weevil Rhynchophorus ferrugineus were topically treated with a dose of 1.
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.
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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.
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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 almostly the mid-stage. How to cite this article: K. Ghoneim, A. Abdel-Ghaffar , Pakistan Journal of Biological Sciences, 6: DOI: This reduction in body wall chitin was found ranging from zero to ninety eight percent.
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The plot of concentrations of acetone extractives of plant and percent reduction in the body wall chitin was found exhibiting a characteristic S- form of displacement, which herewith titled as Punyamayee Dose Response Curve. Since the effects of juvenoids involve the inhibition of metamorphosis through reduction in chitin deposition, it is possible to express the concentration dose applied in terms of ID50 value.
The ID50 value of juvenoid contents of selected non mulberry flora can be defined as the specific unit microgram , which enable to chitin to deposit fifty percent less in the body wall of larvae In comparison with untreated control. Accordingly ,the ID50 values calculated from the Punyamayee Dose Response Curves for non mulberry plants : Vitis vinifera; Alstonia scholaris; Santalum album; Lantena camera; Syzyguim cumuni and Tectona grandis were found measured 1.
The variation in the ID50 values among the non mulberry flora for the fifth instar larvae of silkworm, Bombyx mori L Race : PM x CSR2 in the study may be concerned with quantity of acetone soluble juvenoid contents of the plants.
Acetone soluble juvenoid content of non mulberry flora may be utilized efficiently for the fortified development of fifth instars of silkworm, Bombyx mori L and thereby, the cocoon quality. Sigmoid S-form Punyamayee Dose Response Curve may help for quantitative estimation of juvenoid contents of various plants.
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Shukla , Sarawade Jeevan P. Indapur Dist. Abstract Phytophagus insects derive nutrients and growth promoting biocompounds from the variable or specific flora available for them.
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