FIELD APPRAISAL OF PICARBUTRAZOX 9.53 % W/W (100 SC) AGAINST DOWNY MILDEW OF GRAPESSujoy Saha, Sneha Bhosale, Shital Pharate and Nitin V. PhadAbstract Grape is an important fruit crop of India, which belongs to the family Vitaceae. Downy mildew caused by pathogen Plasmopara viticola is a fungal disease which is of global concern. Picarbutrazox 9.53 % w/w (100 SC) was evaluated against downy mildew disease at field conditions for two seasons at two locations viz., Nashik and Sangli districts of Maharashtra in 2017-18 and 2018-19. Based on the favorable weather conditions four foliar sprays (one preventive + three curative) were applied as soon as first symptoms were observed in experimental plot. Picarbutrazox 9.53 % w/w (100 SC) @ 1250 ml/ha was most effective in controlling the disease at both locations. At Sangli, Picarbutrazox 9.53 % w/w (100 SC) @ 1000 and 1250 ml/ha were at par with each other for both the seasons. However in Nashik, Picarbutrazox 9.53% w/w (100 SC) @ 1250 ml/ha was significantly superior over all treatments. Pooled data for both locations showed the same trend according to respective locations. Pooled Percent Disease Index of Picarbutrazox 9.53 % w/w (100 SC) @ 1250 ml/ha on leaves was 9.31 and 7.13 in Nashik and Sangli respectively which was significantly less than rest of the treatments. Picarbutrazox 9.53 % w/w (100 SC) @ 1250 ml/ha showed highest marketable yield, i.e. 24.87 and 25.31 t/ha in Nashik and Sangli respectively. The chemical was not phytotoxic at 2500 ml/ha. Hence, Picarbutrazox 9.53 % w/w (100 SC) 1000-1250 ml/ha can be recommended for the control of downy mildew. |