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Impact of Farm Management Practices on Downy Mildew Disease of Cucumber in High Tunnels

Muhammad N. Shahid, Muhammad Abid, Sobia Chohan, Muhammad Binyameen, Muhammad Sajid

Abstract


Downy mildew of cucumber caused by Pseudoperonospora cubensisis is a serious threat to the cucurbits production in high tunnels. In this study, the disease incidence and severity were recorded from nine high tunnel farms, located at Vehari District, Pakistan. The results revealed that downy mildew incidence was ranged from 24 to 80%. The disease development was correlated with plant genotype, sowing time, commonly used fungicides, and plant growth stages. "Kaan" was the most resistant while "Yayla" was the highly susceptible plant genotype against the disease. Cucumber sowing at mid-November showed significantly less disease over early and late sowing. Flowering was the most vulnerable stage of plants for disease development. ‘Champion’ (Copper hydroxide) followed by ‘Score’ (Difenoconazole) fungicides reduced the disease to 55% and 43%, respectively, which increased the yield 8-15 %. We conclude that the use of resistant genotype “Kaan”, protectant fungicide ‘Champion’ and appropriate sowing time Mid-November may reduce the disease incidence appreciably in high tunnels.

Keywords


Downy mildew; Pseudoperonospora cubensis; Cucumber; plant resistance; sowing time; fungicide; high tunnels

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DOI: 10.33687/phytopath.009.03.3457

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Copyright (c) 2021 Muhammad Nadeem Shahid, Muhammad Abid, Sobia Chohan, Muhammad Binyameen, Muhammad Sajid

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