2013 Black Dot Foliar Fungicides (200 Series)
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1 2013 Black Dot Foliar Fungicides (200 Series) Location: Plot design: Inkster, ND 4 rows X 30 feet X 4 reps; RCBD All 4 rows were sprayed; foliar disease data was taken from the center 2 rows. Planting date: June 7, 2013 Row width: 36 inches Seed spacing: 14 inches Cultivar: Russet Burbank 50% Emergence: June 27 Fertilizer: Broadcast: 61#N, 200#K, 30#S; June 3 Starter: 29#N, 100#P; June 7 Herbicide: Matrix (1.5 oz/a) + Ad-Wet 90Plus (1 pt/100 gal); July 1 Insecticide: Objective: (8.7 oz/a); IF at plant Coragen (5 oz/a); August 1 Reaper (12 oz/a) + Activator 90 (2 pt/100 gal); August 8 Kaiso (2 oz/a); August 22 Blackhawk (3.3 oz/a); August 27 To determine the efficacy of standard fungicide chemistries and fungicide programs for the control of black dot caused by Colletotrichum coccodes. Black dot inoculation method: Five C. coccodes isolates representing vegetative compatibility groups 2, and 6 were grown for 5 to 6 weeks on CV-8 agar medium. Microsclerotia were released from the agar using an electric blender and the microsclerotial suspension was adjusted to a concentration of 1.0 x 10 5 microsclerotia / ml in distilled water. The suspension was applied at a rate of foot row to the outside two rows of each plot on the evening of July 22 using custom ATV spray equipment. Treatment application dates: July 16, 26, August 1, 8, 14, 20, 27, Sept. 2, 9 Treatment application method: Fungicides were applied using a converted ATV (55 psi; 61 gpa; 11005XR nozzles). Vinekill: Rotobeat; October 7 Harvest: October 7 7/27/2011 4:45 PM
2 2013 Black Dot Foliar Fungicides - Inkster Series 200 Foliar Disease (% Severity) Treatment Rate Schedule AUDPC RAUDPC 7/17 7/25 8/1 8/7 8/13 8/19 8/26 9/3 9/10 9/17 9/24 Non-treated / Noninoculated Non-treated / inoculated 203 Priaxor 4 fl oz / a 1, Manzate 5,7,9 204 Priaxor 6 fl oz / a 1, Manzate 5,7,9 205 Reason fl oz / a + 1,3 Bond % v/v Echo Zn 1.3 pt / a 2 Echo Zn pt / a 4,6,8-10 Luna Tranquility fl oz / a + 5 Scala fl oz / a Emesto Silver fl oz / cwt + Seed In-furrow 207 Emesto Silver fl oz / cwt + Seed Serenade Soil qt / a In-furrow 208 Emesto Silver fl oz / cwt + Seed Serenade Soil qt / a + In-furrow 209 Emesto Silver fl oz / cwt + Seed
3 210 Emesto Silver fl oz / cwt + Seed Emesto Silver fl oz / cwt + Seed BCS-AR fl oz / a Headline 9 fl oz / a 1 Echo Zn pt / a LSD P = 0.05 NS NS NS
4 2013 Black Dot Foliar Fungicides - Inkster Series 200 Treatment Rate Schedule Black Dot (% Stem Incidence) 8/19 8/26 9/3 9/10 9/17 9/24 AUDPC RAUDPC Yield (cwt/a) Non-treated / Noninoculated Non-treated / inoculated 203 Priaxor 4 fl oz / a 1, Manzate 5,7,9 204 Priaxor 6 fl oz / a 1, Manzate 5,7,9 205 Reason fl oz / a + 1,3 Bond % v/v Echo Zn 1.3 pt / a 2 Echo Zn pt / a 4,6,8-10 Luna Tranquility fl oz / a + 5 Scala fl oz / a Emesto Silver fl oz / cwt + Seed In-furrow 207 Emesto Silver fl oz / cwt + Seed Serenade Soil qt / a In-furrow 208 Emesto Silver fl oz / cwt + Seed Serenade Soil qt / a + In-furrow
5 209 Emesto Silver fl oz / cwt + Seed Emesto Silver fl oz / cwt + Seed Emesto Silver fl oz / cwt + Seed BCS-AR fl oz / a Headline 9 fl oz / a 1 Echo Zn pt / a LSD P = 0.05 NS NS
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