AbstractThe tomato late blight incited by Phytophthora infestans is yield limiting disease in tomato which is threatening global food security leading to sudden disease outbreaks and severe crop losses due to distinct evolutionary nature of pathogen. The genetic resistance in host and conventional fungicides resulted in limited management of this disease. Hence, the efforts were made to evaluate newer fungicides against late blight in field conditions for two successive seasons i.e., kharif 2019 and kharif 2020. Of the various fungicides, the combination fungicide, Famoxadone 16.6 % + Cymoxanil 22.1 % – 38.7 SC @ 1.0 ml/l resulted in least disease severity of 11.06 per cent and 10.68 per cent during first and second season respectively. The Azoxystrobin 8.3 % + Mancozeb 66.7 %, 75 WG @ 3g/l noted with 12.35 per cent and 11.68 per cent of disease severity in first and second season respectively. Consequently, Azoxystrobin 23 % SC @ 1 ml/l exhibited 19.55 per cent and 18.11 per cent of disease severity in first and second season respectively. Hence, the targeted approach ensures that new fungicide molecules with higher efficacy and safer residue levels are effective at managing tomato late blight disease outbreaks, reducing overall fungicides use and costs and improving tomato farming.
Haveri et al. (Wed,) studied this question.