Describe the names of any four diseases of silkworm and their causal agents (scientific names), sources of infection, symptoms, and management. (UPSC 2020, 20 Marks, )

रेशमकीट की किसी चार बीमारियों के नाम और उनके कारण एजेंट (वैज्ञानिक नाम), संक्रमण के स्रोत, लक्षण और प्रबंधन का वर्णन करें। (Describe the names of any four diseases of silkworm and their causal agents (scientific names), sources of infection, symptoms, and management.)

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Describe the names of any four diseases of silkworm and their causal agents (scientific names), sources of infection, symptoms, and management. (UPSC 2020, 20 Marks, )