Vol. 12, Issue 6 (2023)

Author(s):
Arunendra Pandey, Pradeep Kumar, Dr. Sarvendra Singh, Akhilesh Kumar and Manoj Kumar

Abstract:
The experiment was carried out at the experimental Organic Agricultural Research farm Narayan Bagh, Department of Entomology, Institute of Agricultural Sciences, Bundelkhand University, Jhansi (U.P.) during Rabi season of 2021-22. During the study Mustard aphid, Lipaphis erysimi (Kalt.) was the major pest found infesting this crop in Jhansi area of Bundelkhand region. The population of mustard aphid, Lipaphis erysimi (kalt.) appeared on 14^th November and continued till last week of 23^th March. The number of aphid per plant varied from 28.05-45.33 whereas the mustard aphid population was low during the month of 17^th January to 20^th March and varied between 26.12 to 2.5 aphid/plant. During this period mean temperature and relative humidity ranged from 5.8 to18.3 and 72.0 to 9 percent, respectively. Mustard sawfly was observed during 48^th SMW 1^st week of December, 2021 and active until 10^th SMW 2^st week of March 2022. Highest population (1.01/plant) was observed during the 2th SMW 2nd week of January 2022, when the maximum temperature and minimum temperature were 19.2 °C and 10.4 °C with 91% and 71% maximum and minimum, relation humidity, respectively and 23.8 rainfalls. Painted bug was observed during 49th SMW 2nd week of December, 2021 and active until 11th SMW 3rd week of March 2022. Highest population (6.9/plant) was observed during the 1st SMW 1st week of January 2022 when the maximum temperature and minimum temperature were 20.9 °C and 7.7 °C with 91% and 71% maximum and minimum relation humidity, respectively and 18 rainfalls. Ladybird beetle, C. transversalis was observed during 1th SMW 1st week of January 2021 and was found to be active till 11th SMW 3rd week of March 2022 and maximum population of 1.75 plant was observed during the 8th SMW. last week of Feb. 2022 when the maximum temperature and minimum temperature were 28 °C and 11.3 °C with 84% and 46% maximum and minimum relative humidity, respectively and 0 mm rainfall.