Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Cabbage > Brown leaves
Cabbage > Leaves > Brown leaves
1 of 3
Black Rot
Xanthomonas campestris
- Leaves wilt, turn yellow and eventually turn brown and die
- Yellow V-shaped lesions develop on margin of leaves, the point of the v follows a vein towards the base of the leaf
- 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
- More information on Black rot
2 of 3
Fusarium Wilt (Yellows)
Fusarium oxysporum f.sp. conglutinans
- Affected leaves wilt, eventually turn brown, become dry and brittle, and may fall off
- Plant has a yellowish-green overall color that often occurs only on one side of the plant
- Lower leaves yellow first, yellowing progresses up the plant
- Stem and midrib of the leaf curve to one side
- Veins in affected leaves are yellowish brown
3 of 3
- - CLICK PHOTO TO ENLARGE -
Bottom Rot/Head Rot
Rhizoctonia solani
- Leaves turn yellow/brown and wilt
- Bottom of lower leaf develops sunken, black, and elliptical lesions parallel to the midrib of the leaf
- Dark cobweb-like or cotton-like fungal growth develops between diseased leaves
- Disease may be limited to the lowest leaves or may start at the bottom of the plant and move up through wrapper leaves into the cabbage head
