Madhu Mishra

Principal, Anand Vihar College for Women, Link Road No. 1 Tulsi Nagar, Bhopal-462003 (India) Email:,


Temperature influences the symptom expression of a disease to a great extent. Change in temperature results in a great diversity in type as well as in sequence of symptom expression. Present study shows the effect of temperature on the incubation period and disease development caused by groundnut mosaic virus. Optimum temperature for disease development was found to be 30oC (±2oC) at which incubation period was 11 days. Temperature lower or higher than the optimum increased the incubation period and changed the nature of symptoms. In plants which were kept at 45oC for 20 days and then transferred to normal conditions, no viral symptoms were observed.

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