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학술저널
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한국잠사학회 International Journal of Industrial Entomology International Journal of Industrial Entomology 제27권 제2호
발행연도
2013.1
수록면
282 - 288 (7page)

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In nature, the population of Nosema bombycis (Microsporidia) causing pebrine disease issmall and their development is extremely slow and only few ultimately producing spores. Pebrine infected silkworm, Bombyx mori larvae collected from sericulture field were alive till3rd generation though the concentration of N.bombycis spore was very high (2.4 - 3.0 x 108spores. mL-1). All larvae were died during 4th generation with extremely high concentrationof pebrine spores (3.0 - 4.0 x 109 spores. mL-1) and mostly contain long polar tube (LT). Alternately, all larvae were died immediately (at 3rd stage of 1st generation) when it wasartificially inoculated with same concentration of N.bombycis spores harvested from field (2.4 -3.0 x 108 spores. mL-1) though concentration of spores harvest was very less (3.0- 4.0 x 106 spores. mL-1) and mostly contain short polar tube (ST). Artificially pebrine infected male moth when matedwith healthy female moth took six generations to develop pebrine disease and all larvae were diedat the 2nd stage with very less spore harvest (3.0 - 10.0 x 105 spores. mL -1). Survival percentagewas increased in all generations (~92.0% at 4th generation) when silkworm rearing wasconducted under new integrated disease management system.

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