Symptom The stems develop water-soaked spots which later may be covered with a cottony white growth. As the disease progresses, affected portions of the stem develop a bleached appearance, and eventually the tissues shred. Girdling of the stem results in premature ripening and in lodging of plants. Hard black bodies, the sclerotia , are formed inside the stem and occasionally on the stem surface. Basal stalk infections rarely occur. Yield loss of 10 to15% has occurred in Saskatchewan, Manitoba and North Dakota; occasionally losses of 50% have occurred in Manitoba Management Use crop rotation; do not plant highly susceptible crops more than once in four years, including dry edible beans, sunflowers, mustard and canola. Use at least a five year rotation for severely infested fields. Avoid planting next to a field that had severe Sclerotinia in the past four or five years. Control broad-leaved weeds. Plant thoroughly cleaned seed. Avoid dense stands of canola.
The stems develop water-soaked spots which later may be covered with a cottony white growth.
As the disease progresses, affected portions of the stem develop a bleached appearance, and eventually the tissues shred.
Girdling of the stem results in premature ripening and in lodging of plants.
Hard black bodies, the sclerotia , are formed inside the stem and occasionally on the stem surface. Basal stalk infections rarely occur.
Yield loss of 10 to15% has occurred in Saskatchewan, Manitoba and North Dakota; occasionally losses of 50% have occurred in Manitoba
Use crop rotation; do not plant highly susceptible crops more than once in four years, including dry edible beans, sunflowers, mustard and canola. Use at least a five year rotation for severely infested fields.
Avoid planting next to a field that had severe Sclerotinia in the past four or five years. Control broad-leaved weeds.
Plant thoroughly cleaned seed. Avoid dense stands of canola.
