How to Manage Pests
UC Pest Management Guidelines
Fusarium Crown and Foot Rot
Pathogen: Fusarium solani f. sp. cucurbitae
(Reviewed 12/09, updated 12/09)
In this Guideline:
SYMPTOMS AND SIGNS
Although all cucurbits are susceptible, Fusarium crown and foot rot is a problem only on squash and pumpkin. The fungus causes water-soaked lesions on the stem at the soil line. Infected plants wilt and die. On the fruit, the lesions usually begin on the area that is resting on the ground. Fruit lesions are firm and dry, with the decayed area exhibiting a concentric ring pattern.
COMMENTS ON THE DISEASE
This fungus survives in the soil and on seed. The disease occurs most often in the Central Coast of California. There are two races of the fungus; Race 1 attacks any part of the plant, while Race 2 attacks only the fruit. This disease tends to be most severe when melons are planted following barley or other grain crops that are plowed under by not completely decomposed.
Rotate out of cucurbits for 2 to 3 years and use clean seed. Don't plant melons following a barley crop.
UC IPM Pest Management Guidelines:
R. M. Davis, Plant Pathology, UC Davis
Acknowledgment for contributions to Diseases:W. D. Gubler, Plant Pathology, UC Davis