Fungicides for Control of Eastern Filbert Blight Jay W. Pscheidt, OSU Extension Plant Pathology Specialist Many experiments have been conducted in the last 25 years to evaluate fungicide effectiveness against Eastern Filbert Blight (EFB). Dr. Ron Cameron directed several trials in the late 1970's and early 1980's. Oregon State University has also conducted a huge volume of laboratory, greenhouse and field trials within the last 10 years.  Each of the tables generated for this summary list the trade name of the product tested, rate of product used per 100 gallons water, active ingredient, average number of applications per season, average level of control and total number of trials conducted. Trade names are those used during the year the product was tested. Rates are in product per 100 gallons water and are NOT expressed in product per acre. In general, an equivalent rate per acre for a mature orchard might be 2 to 4 times the per 100 gallon rate. The percent control is based on the number of cankers found per tree. For example, if a non-treated tree had 10 cankers and a fungicide treated tree had 1 canker then the fungicide applications resulted in 90% control of EFB. The number in parenthesis next to the total number of trials conducted indicates the number of significant trials. In other words, the number of trials where application of that material resulted in control significantly better than no application of fungicide at all. Summary Tables Table 1 Registered Materials Table 2 Number of Bravo 720 applications needed Table 2 per season for control of EFB Table 3 Demethylation-inhibiting Fungicides (DMI) for control of EFB Table 4 Combined Bravo 720 followed by DMI applications Table 5 Strobilurin Fungicides for Control of EFB Table 6 Miscellaneous materials for the control of EFB General Summary of Fungicide Group Effectiveness (pdf file) Detailed Fungicide Research Reports Information on the relative efficacy of fungicides, fungicide schedules or cultural practices for control of plant diseases such as EFB is generated each year. This more detailed information can be found at the following web site: The Fruit and Ornamental Disease Management Testing Program				Management Tour Previous / Next   Management Pages Scout Replace Pollinizers Apply Fungicides Summary Tables Abound Bordeaux Bravo Cabrio Copper Hydroxides Elite Gem (Flint) Orbit/Tilt Procure Quash Rubigan Remove Cankers Plant Resistant Cultivars Destroy Escaped Seedlings Burning Rules Where to Focus  Your Resources
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