|
Green peach aphids
Identification tip: Green peach aphids are dark
green to yellow and have no waxy covering.
|
Springtails
Identification
tip: Less than about 1/8 inch long, wingless,
and with a forked appendage at the tip of the abdomen used
for springing into the air.
|
Leafminer damage
Identification
tip: Larvae mine between upper and lower leaf
surfaces, creating winding, whitish tunnel.
|
Symphylans
Identification tip: Less than 1/3-inch long, with
15 body segments, and 11 to 12 pairs of legs. Slender,
elongated, and white with prominent antennae.
|
Corky root damage
Identification tip: Young corky root infected lettuce
plant showing banding of green to tan areas on tap and lateral
roots. |
Lettuce dieback
Identification tip: Outermost leaves are extensively
yellowed. Younger, inner leaves often remain dark green in
color, but can be rough and leathery.
|
|
Ammonium toxicity
Identification tip: Discolored vascular tissue caused
by ammonium toxicity.
|
No photo available.
Fusarium wilt
Identification tip: Leaves turn yellow and develop
tipburn. The vascular system is brown to black in
the leaves and a reddish brown discoloration develops in
the cortex of the crown and upper root. Plants may be stunted
and fail to form heads.
|
Tomato spotted wilt
Identification tip: Iceberg lettuce develops necrotic
lesions on leaves. |
