الفهرس 
Mulberry growth parameters
Mulberry growth parametersOnly 14 pages are availabe for public view
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Abstract
Name of Candidate: Ghada Mahmoud Ahmad Hammad Degree: Ph.D.
Title of Thesis: C/N ratio of mulberry leaves fed to silkworms, Bombyx
mori L. larvae as an index for its productivity
Supervisors: Dr. Mohammad Ahmad Ahmad Eid
Dr. Salah Abd-Alla Saleh El-Maasarawy
Dr. Souad Morsi Mahmoud
Department: Economic Entomology and Pesticides
Branch: Economic Entomology Approval: / /2009
ABSTRACT
The present study was conducted to evaluate the performance of five mulberry varieties used for rearing the bivoltine race (EJ) of mulberry silkworm. Nutritional composition of the leaves was determined especially carbohydrate/protein (C/N) ratioes. Also, leaf/cocoon ratioes and its suitability for judging the mulberry leaves efficiency were determined.
The results show significant differences between varieties. Kokuso-27 and Kearyang-Seoban-3 show higher nutritional components followed by Josaengrok-2. While the lowest values were recorded in Morittiana and Kokuso-20 varieties. Kokuso-27 and Kearyang-Seoban-3 recorded lowest values in C/N ratio and in leaf/cocoon ratio. Therefore, Kokuso-27 and Kearyang-Seoban-3 give more superiority over other varieties, so they can be used as criteria for comparing the different mulberry varieties.
The biological, economic and technological characters of silkworm were reflection of higher values of leaf nutritional contents, lower values of carbohydrate/ protein ratio and leaf /cocoon ratio.
Key words: Mulberry varieties, Silkworm, Nutritional components, C/N
ratio, Leaf/Cocoon ratio.