Why does your Savoy Cabbage Sonho F1 have white powder? Diagnose the cause and fix it with our step-by-step guide.
This fungal disease is common in Brassica species when humidity is high and air circulation is poor. It manifests as white, flour-like patches on the surface of the Savoy cabbage leaves, which can eventually lead to leaf necrosis.
Savoy Cabbage varieties are characterized by a heavy, crinkled texture and a natural epicuticular wax coating. This can sometimes appear as a dusty or whitish film on the leaves, which is actually a physiological feature for moisture retention.
Small white insects can congregate on the undersides of cabbage leaves, leaving behind tiny white eggs or excrement that looks like dust. Their feeding action can also cause a subtle whitening or chlorotic appearance on the foliage.
Your plant might also be experiencing one of these issues:
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