Vol. 12, Issue 6 (2023)

Author(s):
Pankaj Kumar, Dharamraj Singh, Shailendra Kumar Mishra, Ankit Kumar Mishra, Brajrajsharan Tiwari and Dhananjay Kushwaha

Abstract:
The investigation entitled, “Evaluation of coriander genotypes for resistance against coriander aphid, Hyadaphis coriandri (Das.) on coriander” was conducted at the Vegetable Research Farm, Kalyanpur, C.S. Azad University of Agriculture and Technology, Kanpur during Rabi season 2021-22. The population of aphid started in the last week of January, increased and reached to peak (196.4 aphids/umbel/plant) at 27.4 °C maximum temperature, 12.3 °C minimum temperature, 64.5 percent average relative humidity in the second week of February, thereafter, the population declined gradually and completely disappeared in the third week of February. The result of screening of various varieties/germplasm of coriander against H. coriandri indicate that the least susceptible germplasm viz. KS-1908, KS-2006, KS-2003 and KS-9903 having (1.8, 2.8, 3.4 and 4.2 aphids/umbel/plant). The germplasm KS-8911 and KS-8901 was found moderately resistant with the aphid population was observed (15.0 and 6.2 aphids/umbel/plant). The susceptible varieties like, KS 8903 and KS-9501 having (15.2&23.6 aphid/umbel/plant). The highest infestation was observed in varieties KS-8906 and KS-9109 having Population 40.2, and 26.8 (aphids/umbel/plant) respectively. None of the varieties were found free from the attack of coriander aphid (Hyadaphis coriandri Das) on coriander.