Kan prapprung sut ahan thiam phua liang mai pa Eri.
1982
Kannica Joychareon
Artificial diet for Eri silkworm, Philosamia ricini Boisduval was provide to a group of newly hatched larvae. The silkworms can complete their life cycle when the larvae fed on the basal artificial diet with lima bean as a protein source while those fed on soybean, mungbean, the black variety cow pea and the red variety cow pea died within the third instar. Dry heated soybean yields 10% pupae which all died during the pupal stage. The development of the diet has been made by studying the suitable amount of water which was found to be 700 c.c. Alternation of kinds and amount of mold inhibitor from the basal diet resulted in prolonged larval development period and decreasing cocoon weight and shell weight. The time for larval development and the quantity of silk production did not improve ahen added with beta-sitosterol. Wheat germ, sucrose and Wesson's salt mixture caused prolonged larval development and poor silk quantity. Both the percentage of pupation and egg production were decreased. The suitable amount of casein in the basal diet was found to be 4 %. P. ricini that fed on this diet had larval period 3 days shorter than those on basal diet. The cocoon weight and shell weight were increased. Percentage of adult with normal wings was improved at 35 %. Linoleic acid is not required by P. ricini since poor performance on larval development and 100 % adults with deformed wings occured. However, linseed oil, the predominately linolenic acid was found to be the important source of essential fatty acid for P. ricini. The newly hatched larvae that fed on the artificial diet added with 0.6 % linseed oil yielded 50 % normal wings adults. The percentage was 85 % when fed the 1st to 4th instar larvae with 0.6 % linseed oil diet and the 5th instar larvae with 3.0 % linseed oil diet. Rearing of ricini on basal diet for 3 successive generation resulted in prolonged larval development period, decreased the number of eggs produced and the weight of cocoon and shell. However, P. ricini that fed on the final diet had larval period 2 days longer than on natural food, but had better silk quantity. Percentage of adult with normal wings is 85 % while those fed on basal diet and natural food produced only 10 % and 100 % normal respectively.
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Эту запись предоставил Wolters Kluwer