| AFFECTING LEAVES AND SPEARS: |
|
CONDITION
|
CAUSE
|
 |
Yellow
leaves, slow growth |
Nitrogen deficiency.
|
|
Yellow
leaves, dwarfed plants, plants form bushy rosettes. |
Asparagus aphids
|
|
Yellow
leaves, wilting, dieback of crown. |
Fusarium wilt (Fusarium
oxysporum)
|
|
Foliage
turns reddish brown and drops; small reddish spots on main stems and
branches. |
Rust
|
|
Defoliated
plants/deformed spears. |
Several insect pests
cause this kind of injury, including Asparagus beetles
|
|
Chewed
stalks at soil line, seedlings clipped off at soil line. |
Cutworms (Noctuidae
spp.)
|
|
Large
lesions at base of spears or below soil line; small spears. |
Fusarium wilt (Fusarium
oxysporum)
|
|
Spears
turn brown near soil line. |
Phytopthora
crown rot (Phytophthora spp.)
|
|
Bracts
of spears are spread out. |
Feathering caused by
high temperatures (>85° F.)
|
