Vol. 11, Special Issue 3 (2022)

Author(s):
Harshita AP, Gopali JB, Ramanagouda SH, Basavaraja N, Rudresh DL and Mulla SR

Abstract:
A field experiment was conducted at vegetable farm section, College of Horticulture, Bagalkot, Karnataka in Kharif season during 2018-19 and 2019-20 with intended to study the seasonal incidence of major insect pests of vegetable pigeonpea (Cajanus cajan L.). All together, 24 insect species belonging to seven orders such as Lepidoptera, Diptera, Hemiptera, Coleoptera, Orthoptera, Thysanoptera and Hymenoptera were recorded during the course of study. Out of which, blue butterfly, Lampides boeticus, gram pod borer, Helicoverpa armigera, pod fly, Melanagromyza obtusa, green sting bug, Nezara viridula and tur pod bug, Clavigrella gibbosa were found to be the major pests on vegetable pigeonpea with a highest population of 4.60/ plant and 4.90/plant, 6.8/plant and 5.8/plant, 2.7/pod and 3.20/pod, 13.0/plant and 16.4/plant, 9.2/plant and 8.40/plant during 2018-19 and 2019-20, respectively. Correlation studies revealed that the influence of weather factors on insect pests varied over the cropping seasons. However, only blue butterfly, pod fly and tur pod bug were significantly correlated with weather factors such as, rainfall influenced the population of blue butterfly, whereas minimum temperature, afternoon relative humidity and rainfall affected pod fly and minimum temperature for tur pod bug.