Why does your Brassica oleracea Pronca F1 have white cottony spots? Diagnose the cause and fix it with our step-by-step guide.
This is the most common cause of white, cottony patches on Brassica leaves. The fungus colonizes the leaf surface, eventually producing white, waxy spore masses that can deform the cabbage head.
These sap-sucking insects secrete a white, waxy, cottony substance to protect themselves. They often cluster in the tight crevices of the cabbage heart and can weaken the plant's vigor.
Certain scale insect species produce a thick, white, waxy coating that resembles cotton. They feed on the plant's phloem, which can lead to leaf yellowing and reduced growth in cabbage crops.
While typically associated with stem rot, Sclerotinia can manifest as white, cottony mycelium spreading across the plant tissue, especially in high-humidity environments.
Your plant might also be experiencing one of these issues:
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