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Strawberry (Fragaria spp.)-Verticillium Wilt Cause Verticillium dahliae, a soilborne fungus that can live many years in soil. The fungus grows into the xylem where it colonizes the plant through mycelial growth and conidial production. Fluid movement in t ...

Strawberry (Fragaria spp.)-Virus Diseases See: Strawberry Cultivar Susceptibility Cause Cultivars of strawberry that have become important in the PNW are tolerant to infection with multiple aphid-transmitted viruses, except Hood. Strawberry crinkle virus, ...

Sugar Beet (Beta vulgaris)-Bacterial Vascular Necrosis and Rot (Erwinia Root Rot) By O. Neher and C. M. Ocamb Cause This disease is caused by a bacterium, Pectobacterium betavasculorum (syn Erwinia carotovora subsp. betavasculorum), present in many native ...

Sugar Beet (Beta vulgaris)-Beet Curly Top By O. Neher and C. M. Ocamb Cause The Beet curly top virus is spread in North America only by the beet leafhopper (Circulifer tenellus). The virus has an extensive host range. The leafhopper breeds readily on must ...

Sugar Beet (Beta vulgaris)-Beet Mosaic By O. Neher and C. M. Ocamb Cause Beet mosaic virus (BMV), which overwinters in infected members of the beet family including red beets. The virus is spread by many aphid species but persists in the aphid vectors onl ...

Sugar Beet (Beta vulgaris)-Cercospora Leaf Spot By O. Neher and C. M. Ocamb Cause Cercospora beticola, a fungus perpetuated in beet refuse. It can be spread on seed produced in regions where the disease is severe. It is becoming a major disease in the Pac ...

Sugar Beet (Beta vulgaris)-Damping-off By O. Neher and C. M. Ocamb Cause The soilborne fungi or fungus-like microorganisms, Pythium spp., Rhizoctonia solani, and Aphanomyces cochlioides, may attack before, during, and after germination. In the Pacific Nor ...

Sugar Beet (Beta vulgaris)-Downy Mildew By O. Neher and C. M. Ocamb (Group M1) Cause The fungus-like microorganism, Peronospora farinosa f. sp. betae (formerly P. schachtii), causes disease on sugar beet for seed mostly west of the Cascade Range. The micr ...

Sugar Beet (Beta vulgaris)-Fusarium Yellows Cause The soilborne fungus, Fusarium oxysporum f. sp. betae. This pathogen can survive many years as hardy spores (chlamydospores) in soil or can persist as colonized plant debris. It also can survive on many we ...

Sugar Beet (Beta vulgaris)-Heart Rot Cause A deficiency in the minor, nonmobile element boron. Symptoms A necrotic cross-hatching inside the leaf petiole. Young leaves turn brown and die, resulting in a rosette of small dead leaves at the top of the beet. ...