G. it. Ent., 4 (22): 223-228
August 31, 1989
Population dynamics of Heliothis armigera (Hüb.)
on chickpea
by
DEVENDRA PRASAD, PREM CHAND, N. K. DEKA, RABINDRA PRASAD
Abstract - The larval population of Heliothis armigera (Hüb.) observed on the chickpea sown on October 12 and 22 was fairly low during the month of December, which was characterized by a minimum daily mean temperature of 7.5 °C and 50 to 53.3 per cent parasitization by the larval parasitoid, Campoletis chlorideae Uchida. The highest peak of the pest was recorded about the first week of March, when the crop was sown on October 12 and November 1 and 21 and December 1. However, in the sowings of October 12 and November 11, peaks were noticed on January 25 and February 11, respectively. These peaks were favoured by minimum daily temperatures ranging between 10.4 and 14.4 °C, distributed rainfalls of 17, 30 and 12 mm during the months of December, January and February, respectively, and parasitization below 20 per cent.
