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Vol. 11, Special Issue 6 (2022)

Population fluctuation of pod borer, Helicoverpa armigera (Hubner) in relation with abiotic factors

Author(s):
Pawan Kumar, DN Mishra, DV Singh, Rajendra Singh and Prashant Mishra
Abstract:
The present experiment was carried out during Rabi season, 2020-21 and 2021-22 at Crop Research Centre (CRC), of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P). Larval population of pod borer was recorded on 10 randomly selected plants of inner rows per plot. The early incidence of larval population was observed at 46th standard week with the mean larval population of 0.26/plant during which maximum and minimum temperature 27.60 0C and 9.90 0C, relative humidity at morning and evening 84.30 and 44.40 per cent and rainfall was 1.30 mm, respectively. The pest activity increased from the third week of November and reached its peak at 10th standard week of March (first week of March) with mean population of 1.33 larvae per plant when maximum and minimum temperature was 32.30 0C and 14.50 0C, relative humidity at morning and evening 72.60 and 35.40 per cent and rainfall was 0.00 mm, respectively. The correlation coefficient for both years indicated non significant negative correlation with minimum r= -0.198 and r= -0.195 and maximum temperature r= -0.288 and r= -0.122 with larval population. However, the morning relative humidity showed non significant positive correlation r =0.166 and r= 0.245, respectively. The evening relative humidity showed non-significant positive correlation r =0.171 and r= 0.070, respectively and the rainfall showed non- significant positive correlation (r= 0.078) and non- significant negative correlation (r = 0.020) during Rabi 2020-21 and 2021-22, respectively.
Pages: 1471-1474  |  272 Views  104 Downloads
How to cite this article:
Pawan Kumar, DN Mishra, DV Singh, Rajendra Singh and Prashant Mishra. Population fluctuation of pod borer, Helicoverpa armigera (Hubner) in relation with abiotic factors. The Pharma Innovation Journal. 2022; 11(6S): 1471-1474.

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