Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 2
Written by Krasimira AVRAMOVA
The purpose of the research is to prolong the period of silkworm rearing during the summer and autumn season. The rearing was carried out in the months of July, August and September at the Experimental Station of Sericulture at the Agricultural University in Plovdiv, Bulgaria. Silkworms in the first, second and third instars were fed by applying artificial diet, and in the last two larval instars – on mulberry leaves from Morus alba L. The results obtained from the studied technological characters show that there is a decrease in the basic values of the cocoon weight and filament length. For other characters, the decrease is negligible. The main conclusion is that the rearing of silkworms during the summer months by using combination of feeding on artificial diet in the first three instars and on mulberry leaves in the fourth and fifth instars is successful and leads to the possibility for more employment of people and increasing of the income of the silkworm rearers.
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