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Cultivar and Seeding Date Effects on Kernel Smut of Rice

^a Dep. of Crop, Soil, and Environmental Sciences, 1366 W. Altheimer Dr., Fayetteville, AR 72704
^b Dep. of Crop, Soil, and Environmental Sciences, PTSC 115, Fayetteville, AR 72701
^c Dep. of Plant Pathology, PTSC 217, Fayetteville, AR 72701
^d Rice Research and Extension Center, P.O. Box 351, Stuttgart, AR 72160

View larger version (40K): [in this window] [in a new window]   Fig. 1. Minimum and maximum air temperatures and precipitation from 1 July through 30 September at the Rice Research Extension Center (RREC) and Northeast Research and Extension Center (NEREC) during 2003, 2004, and 2005. Precipitation amounts >40 mm were entered as 40 mm. Temperature and precipitation data were obtained from the National Climatic Data Center (2006) for weather stations located at Stuttgart, AR and Keiser, AR. The average date of 50% heading is denoted by an open triangle.

View larger version (20K): [in this window] [in a new window]   Fig. 2. Relationship between rice seeding day of year (day of year 80 = 21 March, and day of year 161 = 10 June) and kernel smut incidence (A) and severity (B) for all cultivars and site-years from seeding date experiments conducted in Arkansas from 2003 to 2005.