U of M Gardening Information: What's wrong with my plant?

Cauliflower > Head > Discolored head

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Numerous black sunken spots can form on infected heads
Gray-white sunken leaf spots which are often angular and restricted by the leaf veins
Leaf tissue around the spots turns yellow
Fuzzy gray growth can be seen on the underside of the leaves
Disease is common in cool wet weather
More information on Downy Mildew...

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Yellow V-shaped lesions develop on margin of leaves, the point of the v follows a vein towards the base of the leaf
As infection continues, leaves wilt, turn yellow and eventually turn brown and die
Black veins can be seen in infected leaves, petioles and stems
Sticky yellowish liquid bacterial ooze may be seen if infected veins are cut
Disease favored by hot, humid conditions
Cauliflower head turns uniformly brown when infected
More information on Black rot...

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Gray to black round leaf spots with concentric rings
Leaf tissue becomes dry, brittle and often falls out, resulting in a ‘shot hole’ appearance
Leaf spots often appear first on lower older leaves
Broccoli and cauliflower heads may develop dark brown irregular sunken areas
More information on Leaf Spot...

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