Vol. 10, Special Issue 10 (2021)

Author(s):
Anuj Shakya, RK Dwivedi, Sachin Kumar, Amit Raj, Ankur Prakash Verma and Hari Krishna

Abstract:
The experiments were carried out during two consecutive years 2018 and 2019 at NDF, Kalyanpur of CSAUAT, Kanpur to study the population dynamics of aphids during kharif season on groundnut crop. Initial infestation of aphid found 0.6 mean number of population started at 30^thSW in 2018 whenever during 2019 found 1.0 mean number of population at 31^st SW. The aphid population increased gradually and reached its peak on (41^st SW) i.e. 9.6, (43^rd SW) i.e. 9.3 mean numbers of aphid during 2018 and 2019, respectively. The maximum and minimum temperature prevailed during the study periods (years 2018 and 2019) was 34.0 ℃, 30.5 ℃ and 19.8 ℃, 16.7 ℃, respectively, and the average relative humidity was recorded in terms of 77, 88 per cent, while total rainfall was observed 0.0 mm,0.0 mm, respectively. The correlation matrix indicated a significant positive correlation with maximum temperature (r =0.535) with aphid infestation. However, significant negative correlation was found with average relative humidity (r = -0.820) and also with total rainfall (r = -0.513), while non-significant negatively correlated with minimum temperature (r= -0.386).