Seasonal Incidence of Safflower Aphid Uroleucon Compositae (Theob.) at Jabalpur
The aphid, Uroleucon compositae (Theobald), appeared on the safflower crop in the first week of January during three years (1978–79 to 1980–81) at Jabalpur. Cool humid weather during January – February led to its peak population during the second to fourth weeks of Mireh, when the average weekly maximum and minimum temperatures and relative humidity were about 33°C, 15°C and 44%, respectively. The pest disappeared with the corp matury in the second week of April, when the average weekly maximum temperature reached beyond 40°C, min mum temperature rose above 20°C and on elative humidity decreased upto 22 to 28%.