Vol. 12, Issue 7 (2023)

Author(s):
Aakash, Sandeep Kansal, Ashwani Kumar, Anil Kumar Saini and Garima

Abstract:
Tomato bacterial wilt incited by Ralstonia solanacearum is regarded as a major disease of solanaceous vegetables being its wide distribution in tropical, subtropical and in some warm temperate regions. The study was conducted at Plant Pathology laboratory, Dept. of Plant Pathology, Dr. Y.S. Parmar University, Solan, Himachal Pradesh to find out the efficacy of different chemicals and bioagents against bacterial wilt of tomato. Seven chemicals viz: Blitox, Kocide, Nordox, Bordeaux mixture, Streptocycline, Agrimycin and Bleaching powder were evaluated at three different concentration sunder in-vitro conditions. The present investigation depicted streptocycline as potent inhibitor of R. solanacearum while the in vivo studies revealed the significant efficacy of streptocylcine @ 200 ppm applied as seed and seedling root dip treatment in combination with three periodic drenching with Bordeaux mixture @ 0.8%. Field evaluation studies revealed treatment consisting of application of bleaching powder @ 15 kg/ha before transplanting, amending the soil pH to neutral with lime, seedling root dip treatment with streptocycline @ 200 ppm for 5 minutes in combination with four periodic drenching with Bordeaux mixture @ 0.8% at 10 days interval starting with appearance of disease as efficacious in limiting the bacterial wilt (65.47%) and enhancing the fruit yield (380.7 q/ha).