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Dollar Spot Resistant Hybrids between Creeping Bentgrass and Colonial Bentgrass

Dep. of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ 08901-8520

View larger version (44K): [in a new window]   Fig. 1. Number of colonial bentgrass x creeping bentgrass interspecific hybrid lines exhibiting significantly (P < 0.05) less disease than their creeping bentgrass parent at each rating date in 2001. At 18 and 32 d after inoculation there were no hybrid progeny with significantly less disease than the creeping bentgrass parent 5061. At 69 and 76 d after inoculation there were no hybrid progeny with significantly less disease than the creeping bentgrass parent 4475.

View larger version (27K): [in a new window]   Fig. 2. Disease ratings of plants from the 2001 field test after inoculation with the dollar spot fungus. Data shown are the means and standard errors at each rating date.

View larger version (18K): [in a new window]   Fig. 3. Disease ratings of creeping bentgrass parental line 5061 and three interspecific hybrids from the 2002 field test after inoculation with the dollar spot fungus. Data shown are the means and standard errors at each rating date. Asterisks indicate statistical significance at P < 0.05.

View larger version (124K): [in a new window]   Fig. 4. Photographs comparing the extent of disease in creeping bentgrass parental line 5061 with the resistant interspecific hybrid #15. Photos were taken on 1 Sep. 2001 and 7 Sep. 2002.