Vol. 11, Special Issue 7 (2022)

Author(s):
Priyanka, SK Khinchi, Akhter Hussain, SL Sharma, Sanju Piploda and Pooja Sharma

Abstract:
The field experiment were conducted at Agronomy farm, S.K.N. College of Agriculture, Jobner during Kharif, 2020 and 2021 to know the population dynamics of aphid, Aphis craccivora Koch. The incidence of aphid A. craccivora started in the first week of August in both the years. The population of aphid gradually increased and reached to its peak in the first week of September and last week of August during Kharif, 2020 and 2021 respectively. The correlation studies indicated that the aphid population had significant positive correlation with relative humidity (r= 0.71, r= 0.64) and non significant relationship with temperature and rainfall in both the years. Both the predators, ladybird beetle and syrphid fly had significant positive relationship with aphid population during both the years.