| AFFECTING LEAVES: |
|
CONDITION
|
CAUSE
|
 |
Yellow,
dwarfed young leaves, bushy growth |
Carrot yellows
|
|
Yellow
leaves, older first; stunted plants. |
Nitrogen deficiency
|
|
Yellow,
curled leaves |
Aphids
|
|
Dark
spots with yellow borders |
Cercospora leaf blight
(Cercospora spp.) if younger leaves are affected. Alternaria leaf
blight (Alternaria spp.)if older leaves are affected.
|
|
| AFFECTING ROOTS: |
|
CONDITION
|
CAUSE
|
|
Yellow,
stunted plants that wilt during bright, hot days and recover at night |
Root injury. Check
for Wireworms or Root-knot nematodes
(Meloidogyne spp.)
|
|
Dark
tunnels, often in a zig-zag pattern, on upper and outer part of root |
Carrot weevil (Otiorynchus
spp.)
|
|
Dark
cankers on roots, root deterioration |
Brown canker
|
|
Rotted
roots |
Crop rotation needed
or soil worked when wet
|
