Selection strategies considering varietal differences with respect to egg characters of mulberry silkworm, Bombyx mori L.
نویسندگان
چکیده
منابع مشابه
Blastoderm formation in the silkworm egg (Bombyx mori L).
Embryogenesis in the egg of the silkworm. Bombyx mori, up to 24 h after oviposition was studied by light microscopy with special reference to nuclear migration and blastoderm formation. In Bombyx eggs blastoderm cells seem to form in a mechanism different from that usually seen in many other insect species; that is, in Bombyx eggs no typical cleavage furrows were seen. Cleavage nuclei which had...
متن کاملScreening Strains of the Mulberry Silkworm, Bombyx mori, for Thermotolerance
A tropical climate prevails in most of the sericultural areas in India, where temperature increases during the summer lead to adverse effects on temperate bivoltine silkworm rearing and cause crop losses. Screening for thermotolerance in the silkworm, Bombyxmori L. (Lepidoptera: Bombycidae) is an essential prerequisite for the development of thermotolerant breeds/hybrids. In the current study, ...
متن کاملBio-Economic Changes Due to Long Time Treatment of Carbenda-zim on Mulberry Silkworm (Bombyx mori L.)
The effect of fungicides on silkworm larvae was analyzed with regard to the fact that these beneficial insects are usually affected by fungicides, Daily feeding on 1 and 2g/liter of carbendazim, a systemic fungicide, did not have significant effects on larval and pupal mortality. However the weight of the treated larvae showed considerable weight decrease up to 37% weight.. All the economic tra...
متن کاملBotanicals against Nuclear Polyhedrosis Virus infecting three breeds of mulberry silkworm, Bombyx mori L
Mulberry silkworm, Bombyx mori L, most valued for silk and other medicinal products is prone to various biotic stresses among which the disease caused by Nuclear Polyhedrosis Virus (BmNPV) is most serious as it occurs throughout the year causing losses to the tune of 30-40 per cent. Studies conducted on eco friendly management of the disease using botanicals revealed that 800 ppm hexane leaf ex...
متن کاملCharacterization of Klebsiella granulomatis pathogenic to silkworm, Bombyx mori L.
Bacterial disease of silkworm causes significant reduction of silk production leading to huge economic loss. This study aims to isolate bacteria from diseased silkworm and to determine its pathogenicity and antibiotic resistance. A strain of Klebsiella granulomatis has been isolated from silkworm haemolymph which was later identified on the basis of biochemical tests and 16S rRNA gene sequencin...
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ژورنال
عنوان ژورنال: University Journal of Zoology, Rajshahi University
سال: 2013
ISSN: 2408-8862,1023-6104
DOI: 10.3329/ujzru.v31i0.15375