Archive: Published Articles
ENVIRONMENT AND ECOLOGY
Interdisciplinary International Science Journal
Volume 41 (2023)
Page No. 1989
Environment and Ecology 41 (3C) : 1989—1994, July—September 2023
Article DOI: https://doi.org/10.60151/envec/XPDG5117
Insect Pest Complex on Cauliflower (Brassica oleracea var botrytis L.) and their Correlation with Weather
Parameters in Medziphema, Nagaland
Rongsentula Longchar, Pankaj Neog,
Waluniba, Imtinaro L.
Received 12 April 2023, Accepted 12 June 2023, Published on 4 September 2023
Field experiment was conducted to study the insect pest complex and their incidence on cauliflower during rabi season of 2021-2022 in the Entomological farm, SASRD, Medziphema, Nagaland. Fourteen insect pests were found to attack the crop at different stages of crop growth. Out of these, Green peach aphid, Myzus persicae and Cabbage butterfly, Pieris spp. were considered as major insect pests of cauliflower. The peak population of Green peach aphid (8.74 aphids/leaf) and Cabbage butterfly (4.10 larva /plant) was observed on 17th December and 12th February, respectively. The population of Myzus persicae showed a non-significant negative relation with maximum (r = -0.320) and minimum (r = -0.311) temperature, while positive relation with maximum (r = 0.028) and minimum (r = 0.249) relative humidity as well as rainfall (r = 0.021). The population of Pieris spp. showed a non-significant negative correlation with maximum (r = -0.484) temperature, whereas a significant negative correlation was observed with minimum (r = -0.550) temperature. Correlation of relative humidity with the incidence of Pieris spp. exhibited a non-significant negative correlation with maximum (r = -0.078) and minimum (r = -0.162) relative humidity, while rainfall exhibited a non-significant positive correlation (r = 0.235).
Keywords Brassica oleracea, Myzus persicae, Pieris spp., Correlation.