To identify the disease, examine the center of the root stele region. In a plant infected with red stele disease, the stele is a distinctive rusty-red to dark brown. This discoloration may show only near the dead tip, or it may extend the length of the root. This condition is most evident in the spring before fruiting. Later in the season, this discoloration may be less evident as the decaying roots are replaced by new roots.
Resistant varieties are an effective means of control.
Resistance to red stele disease is, however, a relative term. There are at least five distinct biological races of the causal fungus and not all varieties of strawberries are resistant to all races. No chemical or cultural treatment ensures a normal crop in an infected planting. Red stele resistant cultivars. Upon receiving plants, carefully look roots over to see if any have the rattail appearance that may indicate red stele.