| AFFECTING ROOTS: |
|
CONDITION
|
CAUSE
|
 |
Yellow,
stunted plants that wilt during bright, hot days and recover at night |
Check roots for the
following: slimy, winding tunnels mean Cabbage root maggots
|
|
| AFFECTING LEAVES: |
|
CONDITION
|
CAUSE
|
|
Yellow
v-shaped spots on leaf margins |
Black rot (Xanthomonas
campestris)
|
|
Yellow
leaves, older leaves first, slow growth |
Nitrogen deficiency
|
|
Tan to
dark-brown leaf margins |
Heat injury
|
|
Small,
pitted holes in leaves |
Flea beetles (Phyllotreta
spp.)
|
|
Large
holes in leaves |
Cabbage worms (Pieris
rapae)
|
