On healthy plants this tissue will be white, but on diseased plants, this tissue will be red-brown. Often a distinct line can be seen between the diseased and healthy tissue, especially on the crown. Since this fungus requires free water to spread, the disease is more severe during periods of excess moisture. If water remains standing and oxygen is depleted from the root zone, the plant becomes less capable of resisting invasion by the fungus. Control Avoid saturated soils.
Plant raspberries in well drained soils or on raised beds.
Avoid contamination of planting site. Plant resistant varieties. Titan and Hilton are very susceptible to root rot. For the homeowner, Ridomil and Alliete can be use to drench the soil. Fungicides can be applied in the spring or fall, but Ridomil has cannot be used on raspberries within 45 days of harvest.