ISSN: 0973-7510

E-ISSN: 2581-690X

N.C. Ananya1, Gururaj1, H.C. Swathi1 and M. Vijayendra2
1Department of Sericulture, UAS, GKVK, Bengaluru – 560 065, India.
2College of Agriculture, Chintamani, Chikkaballapur district, India.
J. Pure Appl. Microbiol., 2016, 10 (1): 697-700
© The Author(s). 2016
Received: 28/11/2015 | Accepted: 06/01/2016 | Published: 31/03/2016
Abstract

Mulberry is an economically important tree, being cultivated for its leaves to rear silkworm Bombyx mori L. Mulberry is a perennial and broad leaf plant. Investigation is carried out to know the effect of rearing performance of silkworm as influenced by different spacing in mulberry morus alba L. In the present study the Effective rate of rearing was found to be good in 9×3 ft spacing (89.74 % and 87.64 % in first and second rearings respectively) and lowest was recorded in 3× 3 ft spacing (85.83 % and 83.17 % in first and second rearings respectively). This might be due to less disease incidence in 9×3 ft spacing compare to the 3×3 ft spacing. The maximum instar duration was recorded in 3×3 ft spacing [(I  (89.04 h), II (67.92 h), III (115.92 h), IV (128.4 h) and V (195.12 h)] in first rearing and second rearing [ I (88.56h), II (66.96 h), III (115.44h), IV (127.44h) and V (194.64h)]. Total larval duration was also recorded maximum in 3×3 ft spacing (697.44 h in first rearing, 693.36 h in second rearing). The maximum matured larval weight was observed in 9×3 ft spacing (30.33 g in first tearing and 26.21 g in second rearing) and least was recorded in 3×3 ft spacing (25.31 g in first tearing and 22.43 g in second rearing).

Keywords

Silkworm, Mulberry, Spacing, Rearing.

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