Growth characteristics of different varieties also may influence their tendency to be infected. Iowa State University publishes results of white mold variety trials each year. Sudden death syndrome . Resistance is available in late-maturing varieties, but in maturity groups 0 to III, resistant varieties are not yet available. You should make disease resistance a priority if a potentially recurring disease was a problem in 1997 or 1998.
Most diseases do tend to recur due to pathogen buildup.
Resistance is most effective if used in combination with crop rotation and other management practices. Continuous planting of one resistant variety can lead to a breakdown in resistance to some diseases, so there is some risk to overuse of resistance. In the absence of disease, some resistant varieties may not yield as well as susceptible varieties, but the difference is usually small, especially compared with the substantial yield benefit of resistant varieties in the presence of disease. This information subject to a usage policy .