AbstractThe field experiment was carried out at KRCCH (Kittur Rani Channamma College of Horticulture) Arabhavi, Karnataka during Rabi season of 2021and 2022 to investigate the comparative biological effectiveness of different modules against aphids and pod borer complex in Indian bean (Lablab purpureus L.). Among all the modules chemi intensive module (Thiamethoxam 25 WG @ 0.2g/l – Fipronil 5 SC @ 1ml/l – Spinosad 45 SC @ 0.3ml/l – Emamectin benzoate 5 SG @ 0.2 g/l ) was most efficient in reducing aphid population after 10 days of second spray (0.45 aphids/plant) and it was followed by IPM module (Neem cake (1q/acre) - Azadirachtin 1500 ppm @ 4 ml/l – Difenthiuron 50 WP @ 0.5 g/l - Spinosad 45 SC@ 0.3ml/l with maize and coriander grown at the border of main crop) which recorded 4.64 (aphids/plant). Chemical intensive module was also effective in reducing pod borer infestation by recording lowest mean percent pod damage of 7.11 and was followed by IPM module which recorded 9.92 percent pod damage. The highest yield, 14.37 (t /ha) was recorded from chemi-intensive module and IPM was next best module (13.40 t /ha). Additionally, highest B:C ratio (4.01) was found in chemi intensive module followed by IPM module (3.67). IPM module was found to be safe for predators (spiders and coccinellids) by recording highest number of natural enemies (3.29/plant and 3.47/plant, respectively) after two weeks of first day and fourth spray.
Hirekurubar et al. (2025) studied this question.