Leaves
Stems/Twigs/Smaller Branches
Fruit
|
Strawberry (Fragaria spp)
| AFFECTING LEAVES: |
|
CONDITION |
CAUSE |
 |
Yellow, distorted leaves.
|
Aster yellows virus |
|
Small, deep purple, round to elongate spots on leaves and sometimes on fruit. Spots enlarge and develop light-colored centers. Relative humidities of 98-100% and temperatures of 59 to 77 º F promote infection. Middle-aged leaves appear to be most susceptible. Plant on raised beds and avoid sprinkler irrigation. |
Common leaf spot (Mycosphaerella fragariae). |
|
Yellow stippled to bronzed-colored leaves. |
Spider mites |
|
White frothy areas on leaves and stems. |
Spittle bugs |
|
| AFFECTING FRUIT: |
|
CONDITION |
CAUSE |
|
Senescent leaves, fruits, and petals are susceptible. Under cool (60 –
70° F.), moist conditions a soft, brown decay develops, covered by
a dense gray to light brown mass of spores. |
Gray Mold (Botrytis cenerea)
|
|
