Scientific Name

Fusarium solani (not an often listed disease). Limited to Northern California.

Overall Plant Symptoms

Isolated branches show virus-like leaf distortions and yellowing. Remains isolated to individual stems or plant sides.

Leaf Symptoms

Spotting, leaf mottle and/or interveinal chlorosis limited to individual branches.

Stem Symptoms

Discoloration extends about 4" up the stem from the root lesion.

Root and Fruit Symptoms

A soft and/or wet brown lesion will be found on the main or lateral root.

Disease Source

Much yet unknown. Current infestation suggests spores spread by contaminated soil on machinery.

Source Peristence

Not known. Several fields now in 8+ years of infection.

Favoring Conditions

Cooler temperatures possibly more favorable.

Critical Crop Time

Symptoms most evident after fruit set. Usually reduces crop on portions of plants.

Controls/Management

No controls or management suggestions at this time. Work is proceeding on resistance screening.

Additional Notes

Severe losses are seldom.