Fungal Disease Archives | Page 5 of 6

LEAF BLOTCH DISEASE AFFECTING COASTAL STRAWBERRY

Posted on April 13, 2018August 20, 2018 by Steve Koike

Late spring rains have encouraged the development of several coastal crop diseases, including leaf blotch of strawberry. During the recent drought years this disease was rarely observed; however, leaf blotch (caused by the fungus Zythia fragariae) is showing up in strawberry fields this late spring. Symptoms on leaves will have tan to gray lesions (“blotches”) […]

MARCH AND APRIL RAINS CREATE CONDITIONS FOR LETTUCE ANTHRACNOSE

Posted on April 11, 2018August 20, 2018 by Steve Koike

In California, lettuce anthracnose disease rarely develops without spring rains. The rains in March and April have created conditions that resulted in some anthracnose outbreaks in the coastal region. Initial symptoms are small, water-soaked spots on outer leaves. Spots enlarge, turn orange tan in color (Photo 1), and later will be covered with the white […]