Journal of Applied Biosciences (J. Appl. Biosci.) [ISSN 1997 - 5902]
Volume 44: 2994 - 2999. Published August 29, 2011.
Studies on the impact of microsporidiosis on tropical tasar silkworm Anthereae mylitta Drury
Lakshmi Velide* and A.Purushotham Rao
Kakatiya University-Department of Zoology, Warangal, Andhra Pradesh, India
*Corresponding Author: email: lakshmi.velide@gmail.com
ABSTRACT
Objective: Microsporidiosis (Pebrine) is one of the dreadful disease seen in Anthereae mylitta Drury (Andhra local ecorace), caused by Nosema species. Infections of the disease are highly virulent and harm the cocoon yield as well as cocoon characters. Therefore an attempt has been made to evaluate the impact of Microsporidiosis on Andhra local in respect to transovarial transmission (observed as T1), secondary infection (observed as T2) and Healthy silkworm (observed as T3).
Results: The larval and pupa mortality was 28%, 8% in T1, 20%, 6% in T2 and in case of T3 there was no mortality. In comparison with the control, there was a significant impact (p ≤ 0.05) of infection on larval weight, Number of moths emerged, fecundity, hatching percentage cocoon weight, shell weight, filament length, reelability and weight of the silk reeled. Statistical analysis explains that there is no significant (p ≤ 0.05) variation between T1 and T2 groups.
Conclusion and application: A control over the secondary infection will reduce the transovarial infection and also yield could be increased quantitatively and qualitatively.
Key words: microsporidiosis, nosema, transovarial, secondary infection, Andhra local.
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