Submitted to: Journal of Sugar Beet Research
Publication Type: Abstract Only
Publication Acceptance Date: 10/22/2010
Publication Date: 6/1/2011
Citation: Khan, M.F., Carlson, A.L., Secor, G., Rivera, V.V., Bolton, M.D. 2011. Effect of fungicides on disease control, yield and quality of sugarbeet inoculated with different sources of Cercospora beticola inocula [abstract.] Journal of Sugar Beet Research. 48:85. Interpretive Summary:
Technical Abstract: Cercospora leaf spot caused by Cercospora beticola is the most damaging foliar disease of sugar beet in Minnesota and North Dakota. Growers use a combination of partially resistant varieties, crop rotation, incorporation of debris by tillage operations, and timely applications of fungicides for effective disease control. It is know that misuse, overuse and prolonged usage of fungicides may lead to the development of fungicide resistant isolates of C. beticola and reduced disease control in field conditions. C. beticola inocula were obtained from two different sources and used to artificially inoculate two trials from two different sources and used to artificially inoculate two trials at Foxhome, MN. Plots were treated with multiple applications of the same fungicide with the first application in late July. Fungicides from different chemical classes – triphenyltin hydroxide (SuperTin), triazoles (Eminent, Proline and InspireXT), and strobilurin (Headline) were applied. There was also an untreated check. Cercospora leaf spot disease ratings were done after each fungicide application and before harvest. The middle two rows of each plot were harvested, weighed, and samples were collected and analyzed for quality at American Sugar Company tare laboratory at East Grand Forks, MN. The results from the trials will be presented and discussed.