MANAGEMENT OF CHILLI LEAF CURL VIRUS (ChLCV) OF CHILLI USING SELECTED BOTANICALS, RAW COW MILK, BIOAGENT AND INSECTICIDE UNDER FIELD CONDITION

Abstract

Chilli (Capsicum frutescens) is one of the most important spice and vegetable crop in the world which belongs to Solanaceae family. A field experiment was conducted at the central field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during December 2020 to May 2021. The study was aim to assess the disease incidence (%) and the percent disease index of Chilli leaf curl virus under natural field condition by using different treatments through vector control activities. In this study, total 9 treatment were used viz. T 1 (Neem leaf extract), T 2 ii

(Mahogoni leaf extract), T 3 (Garlic extract),T 4 (Trichoderma +Raw cow milk), T 5 (Malathion @ 3ml/L),T 6 (Lantana leaf extract),T 7 (Raw cow milk), T 8 (Trichoderma),T 9 (Marigold leaf extract) and one without treatment served as control (T 0 ).The field experiment was carried out in randomized complete block design (RCBD) with three replications. Among all the treatments, the minimum disease incidence, were recorded in T 5 (Malathion) and T 1 (Neem leaf extract) which were showed better performance aganist ChLCV. A positive correlation was found between white fly population and disease incidence as well as yield loss and white fly population. Infection by chilli leaf curl disease adversely affected growth and yield attributing characters. However, these two treatments T 5 (Malathion) and T 1 (Neem leaf extract) may be considered as better option to manage ChLCV through vector control.