Journal of Eco-friendly Agriculture

Grape is a fruit crop of commercial significance in the arena of Indian horticulture. Powdery mildew (c.o. -Erysiphe necator) and anthracnose (c.o. - Elsinoe ampelina/ Colletotrichum gloeosporioides) are the most important biotic constraints in grapes. The combination fungicide pydiflumetofen (7.5%) + difenoconazole (12.5% w/v (200 SC) was evaluated for two seasons (2016-17 & 2017-18) in the vineyards of ICAR-National Research Centre for Grapes, Pune, Maharashtra against both the diseases. Different concentrations of pydiflumetofen (7.5%) + difenoconazole (12.5% w/v (200 SC) viz., 400, 500 and 600 ml\ha⁻¹ were compared with its component fungicides, pydiflumetofen 7.5% and difenoconazole 12.5% w/v (200 SC) separately. Experimental results showed that pydiflumetofen (7.5% + difenoconazole 12.5% w/v (200 SC) applied @ 600ml ha⁻¹ manifested the lowest pooled PDI of 10.00 in the case of leaves and 10.31 in case of bunches, respectively with a corresponding yield of 10.99 t ha⁻¹. The test fungicide was not phytotoxic to the grapevines up to the dose of 1200 ml ha⁻¹. Against anthracnose, the pooled data showed that pydiflumetofen 7.5% + difenoconazole 12.5% w/v (200 SC) @ 600 ml ha⁻¹ as foliar spray showed the lowest PDI of 10.81. Hence, the treatment pydiflumetofen (7.5% + difenoconazole 12.5% w/v (200 SC) @ 500-600 ml ha⁻¹ was effective against powdery mildew as well as anthracnose.