cucumber leaf mold drought soil field damage pseudoperonospora cubensis detail leaves growing mildew crop vegetable

cucumber leaf mold field damage leaves growing pseudoperonospora cubensis detail danger crop mildew vegetable calamity disaster soil blight drought dry harvest cucumis sativus mould spreads spray rust aggressively pesticide china fungicide sprays reduction harvested crops closeup agriculture harvesting farm farming czech europe severe white powder covering planting grow plant india