Vol. 11, Special Issue 9 (2022)

Author(s):
Rakesh Yonzone, M Soniya Devi, Bimal Das, Dipak Murmu, Ali Azgar and Tapas Hembram

Abstract:
The present investigation was carried out at Instructional Farm, COA (Extended Campus), UBKV, Majhian, Dakshin Dinajpur, West Bengal to study the seasonal incidence of major pest and diseases of chilli. Among various diseases and insect pests, anthracnose, Cercospora, wilt, thrips, whitefly and Helicoverpa armigera was found to be more prevalent. The disease severity (PDI) of the dominant diseases and incidence of major pests were recorded at seven days interval up to the harvesting of the crop. It was observed that the onset of the diseases was at 52 SMW which progresses significantly and reached peak at 20 SMW. The thrips, whitefly and H. armigera were observed to be initiated at 2 SMW, 6 SMW and 9 SMW, respectively and reached its peak at 10 SMW, 10 SMW and 14 SMW, respectively during 2016-17. During 2017-18, the population was initiated at 4 SMW, 4 SMW and 8 SMW for thrips whitefly and H. armigera, respectively and reaches its peak at 12 SMW, 14 SMW and 12 SMW, respectively. The record of the metrological parameters was also taken and statistically correlated with the disease incidence and pest population.