MANAGEMENT OF TOMATO YELLOW LEAF CURL VIRUS THROUGH INSECTICIDES, BOTANICALS AND LIGHT REFLECTING SILVER COLORED MULCH

Abstract

A field experiment was conducted at the Plant Pathology experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during October 2016 to March 2017. The study was aimed to manage the Tomato yellow leaf curl virus (TYLCV) through insecticides, botanicals and physiological method using light reflecting silver colored mulch. In this study, in total 7 treatments including control were considered viz. T =Neemax, T 5 = Multineem, T 1 6 =Imidacloprid, T 2 = ACmix, T 3 = Subicron, T = light reflecting silver colored mulch and T = Control. High yielding tomato variety BARI Tomato-14 that is susceptible to TYLCV was used. The field experiment was carried out in randomized complete block design with three replications. All the treatments showed significant influence on different assayed parameters in the test crop tomato. The lowest disease incidence (%), disease severity (%) and whitefly association was found in T (light reflecting silver colored mulch) that was 13.33%, 1.96% and 2.0 respectively at 60 DAT. The highest disease incidence %, Disease severity % and whitefly association was found in T 6 (control treatment) that was 46.67%, 46.22% and 18 respectively at 60 DAT. From the relationship study between disease incidence (%), and disease severity (%) with whitefly association, it was revealed

7,

7 4 that disease incidence and severity of TYLCV was increased with increasing of whitefly population and vise-versa. Among the treatments, growth parameters, yield and yield attributers were also found better in T 7, treatment (light reflecting silver colored mulch). From this study we can concluded that physical method is the best option instead of insecticides for controlling the insect vectors of TYLCV.