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Downy mildew or powdery mildew? The difference determines your strategy.
Powdery mildew remains a persistent spoiler in many crops, both outdoors and under glass. However, anyone who approaches 'powdery mildew' as a single disease quickly finds themselves playing catch-up in practice. Downy mildew and powdery mildew sound similar in name, but differ significantly in biology, timing of infection, and treatment. Especially now that room for maneuver is becoming smaller, you must first determine whether you are dealing with downy or powdery mildew, and *only* choose the strategy.
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