SylbV01-00-00. pmd

Unit 2:
Fungal diseases, pathogens, symptomatology, prevention and
control.
Introduction to fungal diseases, economic importance and classification
of fungal diseases of silkworms, general morphology of Deuteromycetes.
Life cycle of the different fungi pathogenic to silkworms-white, green,
yellow, black and red muscardines and 
Aspergillus
diseases. Pre-
disposing factors, symptomatology, pathology (histopathology and
pathophysiology), host range, host susceptibility, prevention and control.
VII. Practicals
• Survey for viral and bacterial diseases of silkworm based on external symptoms;
• Survey for protozoan and fungal diseases of silkworm based on external symptoms;
• Isolation and purification of silkworm viral pathogens;
• Isolation and purification of silkworm bacterial pathogens;
• Staining techniques for silkworm viruses and bacteria;
• Identification of silkworm pathogens based on morphology;
• Infectivity techniques for silkworm diseases;
• Cross infectivity of mulberry lepidopteran pests to silkworm;
• Cross infectivity of pathogens of silkworm pathogens to mulberry lepidopteran pests;
• Purification of pebrine pathogens and hatching of spores;

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Restructured and Revised Syllabi of Post-graduate Programmes
Vol. 1
786
•
In-vitro
evaluation of chemicals against protozoan and fungal pathogens of
silkworm;
•
In vivo
evaluation of effective chemicals against protozoan and fungal pathogens;
• Life cycle studies of important bacterial and fungal pathogens of silkworm;
• Interactions among different silkworm pathogens in silkworm;
• Practising hygienic measures in silkworm rearing for prevention of silkworm
diseases;
• Practising shoot rearing method with net method of bed cleaning for prevention of
silkworm diseases;
• Application of bed disinfectants against different diseases of silkworm;
• Application of room disinfectants to eliminate silkworm pathogens;
• Visit to Silkworm Pathology laboratory of CSB and State Sericulture Institute.