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Effect of Quantum of Feeding on the Rearing of Eri-silkworm, Philosmia Ricini Hutt.

S, B. Huq
Department of Entomology, Bangladesh Agricultural University, Mymensingh

M. A.Haque
Department of Entomology, Bangladesh Agricultural University, Mymensingh

M. A. Wazed
Department of Entomology, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

Experiments were coducted to find out the amount of food and number of feedings for rea ring of Eri-silkorm, Philosamia ricini Hutt. Lepidoptera: Saturnii dae, The better rearing o f 50 Eri-silkworm larvae were observed by feeding castor leaves at the rate of 10, 14,19, 25 and 32g to the first,second, third,fourth and fifth instars, respectively. The optimum number of feedings per day was four at an intervalof six hours.

Keywords: Eri-silkworm, Feedings

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Objectives:

T select suitable amount of food and number of daily feedings for better Eri-silkworm rearing.

Methodology:

Experimeriments were conducted to observe : (i) the effect of amount of food on Eri-silkworm rearing. and (ii) the effect of number of feedings on Eri-silkworm rearing. In both experiments, fifty numbers of first instar larvae were reared in wooden tray (0.6x0. 3x0.07 m) up to adult emergence by feeding castor leaves (GOB). In the experiment concerning amount of food ( Experiment 1), five different treatments were used. The food was offered four times a day at six hours interval. Each treatment was replicated thrice and each replication. Similar amount of food that was found suitable in the first experiment, that is 10, 14, 19, 25 and 32 g to the first,second,third, fourth and fifth instars, respctively were offered in each treatment of this exprirnent. Both experiments were conducted following the principles of completely Randomized Design and the significant means were compared by DMRT.

Source of Information: Bangladesh J. Agril. Sci. 18 (1): 19- 22 January, 1991

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Achievement/Findings:

Thus, it may be concluded that daily feeding of four times at equal int ervals of six hours might be considered for better Eri-silk worm rearing.

Knowledge Management: Journal