Fusarium Race 4 Tolerance Screening: Environmental Effects

Tuesday, January 6, 2015
Salon E (Marriott Rivercenter Hotel)
Wednesday, January 7, 2015
Salon E (Marriott Rivercenter Hotel)
Robert B Hutmacher , University of California Cooperative Extension, Plant Sciences Department
Mauricio Ulloa , USDA-ARS-CSRL
Steven D Wright , University of California Cooperative Extension-Tulare/Kings Co
Mark P Keeley , University of California Cooperative Extension, Plant Science Department
Gerardo Banuelos , University of California Cooperative Extension
Nick Clark , University of CA Cooperative Extension
Tari Lee Frugalti , University of CA Cooperative Extension
Fusarium race 4 tolerance screenings of cultivars have been conducted in both naturally-infested field conditions and in inoculated greenhouse conditions.  Symptomology and some components of rating methods used to evaluate severity of infections under inoculation under greenhouse container-grown plant conditions differ from observed symptoms and ratings under field conditions, and these differences will be summarized.  Impacts of planting date and prevailing soil/air temperature conditions during early plant development on disease severity ratings and mortality in field conditions will be discussed.