INTEGRATED APPROACHES FOR THE MANAGEMENT OF WILT COMPLEX OF TOMATO

Abstract

The in vitro experiments were conducted in the Central Laboratory and net house of the Department of Plant Pathology and the in vivo experiment was conducted in the Central Farm of Sher-e-Bangla Agricultural University, Dhaka-1207 during October’2017 to April’2018 to formulate the integrated approach for the management of wilt complex of tomato. The causal pathogens of wilt complex of tomato were isolated and identified as Fusarium oxysporum for fungal wilt, Ralstonia solanacearum for bacterial wilt and Meloidogyne spp. for nemic wilt. In the in vitro evaluation, the Autostin (Carbendazim) 50 WP and Krosin (Streptomycin sulphate) 10 SP showed significant results in reducing the growth of Fusarium oxysporum (87.88%) and Ralstonia solanacearum (83.33%), respectively. In field experiment, the selected treatments were evaluated alone and in combination as T 1 = Autostin 50 WP, T 2 = Furadan 5G, T 3 = Krosin 10 SP, T 4 = Trichoderma formulation, T 5 = Poultry waste, T 6 = Autostine 50 WP + Trichderma formulation, T 7 = Furadan 5G + Trichderma formulation, T 8 = Krosin 10 SP + Poultry waste, T 11 = Krosin 10 SP + Poultry waste, T 12 = Trichderma formulation + Poultry waste, T 13 = Autostin 50 WP + Trichderma formulation + Poultry waste, T 14 = Furadan 5G + Trichderma formulation + Krosin 10 SP, T 15 = Furadan 5G + Trichderma formulation + Krosin 10 SP + Poultry waste, T 16 = Control. The combination of treatment T 15 showed promising result in reducing the incidence of wilt complex of tomato influencing the yield and yield contributing characters where Furadan 5G, Trichoderma formulation, Krosin 10 SP and Poultry waste were applied combinedly. Treatment T 14 (Furadan 5G + Trichoderma formulation + Krosin 10 SP) and treatment T 7 (Furadan 5G + Trichoderma formulation) also showed remarkable results. The BCR analysis showed that the highest BCR (6.09) was counted in case of T 15 followed by T 14 (5.25) and T 7 (4.93) where investing Tk. 1.00, the tomato growers will grossly earn Tk. 6.09, 5.25 and 4.93, respectively.