Seasonal incidence of pathogenic disease Grasserie in silkworm Bombyx mori in Vidarbha region (Maharashtra)
Rashimi P. Joshi and Raja. I. Ahmad
Research Laboratory of Zoology, Shri Shivaji College, Akola-444001 (India) Email; rashmisawalkar75@gmail.com
ABSTRACT
The survey of Grasserie diseases of silk worm was carried, during the year 2010-11, and 2011-12 through 5 districts (Akola, Amravati, Buldhana, Washim and Yevatmal) of Western Vidarbha regions in Maharashtra. As many as 250 silkworm rearing centers located in various villages. The incidence of Grasserie varies seasonally. During Both study year 2010-11 and 2011-12 the incidences of Grasserie in monsoon season was higher. The district wise incidence during 2010-11 in Monsoon was reported as, Akola7.65%, Yevatmal 7.28 % Amravati 7.12 Washim 6.82% Buldhana 6.61%. in post monsoon it was, Washim 6.1% Akola 5.78% Amravati 5.12% Buldhana 4.98 %Yevatmal 4.21%, in winter season it was recorded as Yevatmal 7.01% Buldhana 6.75 % Akola 6.63% Amravati 6.12% Washim 5.71 and in spring season the incidences of Grasserie was reported as Amravati 7.51% Akola7.23% Buldhana 7.12% Yevatmal 7.11% Washim7.08% During 2011-12 the incidences of Grasserie in monsoon season reported as Amravati 7.64 % Akola 7.42% Yevatmal 7.31% Buldhana6.44% Washim 6.49%, in post monsoon season was as Washim 6.32% Amravati 5.75% Akola 5.64 Buldhana 4.75% Yevatmal 4.47% winter season was Yevatmal 7.12% Akola 6.32% Amravati 6.24% Buldhana 6.17 Washim 5.47 %and in spring season was Amravati 7.75% Buldhana7.57% Akola 7.21% Washim 7.24% Yevatmal 7.17.