POTENTIAL MANAGEMENT PACKAGES ON INCIDENCE AND DAMAGE SEVERITY BY MAJOR INSECT PESTS OF FRENCH BEAN

Abstract

The experiment was conducted to study the potential management against incidence and damage severity by major insect pests of french bean during the period January, 2021 to April, 2021. The experiment consisted of six different treatments viz T 1 = Spraying Bio-neem plus botanical insecticide @ 0.5 ml/L at the 7 days intervals; T 2 = Larval parasitoid + Bamper 20SL (Imidacloprid) @ 0.5 ml/L at the 15 days intervals; T 3 =Field sanitation + Shobicron 425EC (profenofos + cypermethrin) @ 2ml/L at the 15 days intervals; T 4 =Actara 25WG (Thiamethoxam) @ 0.3g/L at the 15 days intervals; T 5 = Larval parasitoid + Yellow sticky board traps; and T 6 = Untreated control. The design of experiment was randomized complete block design (RCBD) with four replications. Bean pod borer, jassid, whitefly, aphid, winged black aphid and epilachna beetle were found in infest french bean. Among different treatments, T 3 showed the best performance followed by T 2 treatment, whereas the lowest performance in T 6 (Untreated control) for controlling incidence and infestation of major insect pests of french bean. At the vegetative and reproductive stage of French bean, the lowest percent of infestation in case of aphid (16.03 and 10.59%), jassid (8.95 and 11.51%), whitefly (2.59 and 6.70%) and winged black aphid (4.84 and (9.08%) were recorded in T 3 treatment, whereas the highest in T 6 (59.76 and 30.35%, 48.15 and 48.54%, 11.98 and 22.32%, 18.64 and 25.73%) treatment respectively. In case of bean pod borer, the highest % of infestation reduction over control at the early, mid and late reproductive stages of french bean in number basis (83.28, 77.11 and 77.76) and in weight basis (74.70, 76.14 and 80.89) in T 3

treatment, whereas the lowest in T 6 (54.49, 55.52, 54.98 and 53.34, 61.86, 68.89) treatment respectively. The overall result indicates that, the order effectiveness of the potential management practices against incidence and damage severity of major insect pests of french bean was T 3 > T 1 > T 4 > T 5 > T 6 .