Field trials reveal oxathiapiprolin and mandipropamid effective against downy mildew in grapes, highlighting compatibility with biocontrol agents.
The study conducted with three concentrations (650, 700 and 750 ml ha–1) of combination fungicide i.e. oxathiapiprolin 3 per cent + mandipropamid 25 per cent w/v (280 SC) evaluated against downy mildew of grapes in 2017-18 and 2018-19 under field conditions at Maharashtra revealed that oxathiapiprolin 3 per cent + mandipropamid 25 per cent w/v (280 SC) @ 750 ml ha–1 manifested lowest PDI of 7.84 with a corresponding yield of 23.98 t ha–1 and it was at par with 700 ml ha–1 with a PDI of 8.65 and yield of 23.01 t ha–1. Hence, it may be recommended for the control of downy mildew of grapes. The compatibility of the test fungicide evaluated with fungal and bacterial bio control agents in in-vitro conditions showed that the fungicide was highly compatible with Bacillus subtilis and Pseudomonas fluorescens.
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Saha et al. (2024) studied this question.
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