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United States Department of Agriculture

Agricultural Research Service

Research Project: PECAN CULTIVATION AND DISEASE MANAGEMENT

Location: Fruit and Nut Research

Title: Efficacy of fungicides for control of scab on a mid-ripening peach variety in middle Georgia, 2011

Authors
item Brannen, P -
item Bock, Clive
item Hotchkiss, Michael

Submitted to: Plant Disease Management Reports
Publication Type: Other
Publication Acceptance Date: August 30, 2013
Publication Date: August 30, 2013
Repository URL: http://www/plantmanagementwork.org/pub/trial/pdmr/
Citation: Brannen, P.M., Bock, C.H., Hotchkiss, M.W. 2013. Efficacy of fungicides for control of scab on a mid-ripening peach variety in middle Georgia, 2011. Plant Disease Management Reports. 7:STF023.

Interpretive Summary: Different fungicides and fungicide regimes were evaluated for control of scab in a mid-ripening experimental peach block (‘Flameprince’) located at the USDA-ARS Fruit and Tree Nut Research Laboratory (Byron, GA). Chemical formulations were applied and included a non-treated control. Treatments were, two applications of Bravo Weather Stik FL (petal fall and shuck split) followed by Yellow Jacket Sulfur cover sprays (chemical standard), two applications of Abound (petal fall and shuck split) followed by Yellow Jacket Sulfur cover sprays, Yellow Jacket Sulfur at all application timings, Bravo at petal fall, Bravo at shuck split, Abound at petal fall, Abound at shuck split, Bravo at petal fall and shuck split, and Abound at petal fall and shuck split. Scab was severe on the non-treated control. All full-season spray regimens were effective for suppression of scab, but two applications of Abound at petal fall and shuck split resulted in near equivalent control to that of Abound at petal fall and shuck split followed by Yellow Jacket Sulfur cover sprays, suggesting that Abound may provide season long control even in the absence of cover sprays.

Technical Abstract: Fungicides were evaluated for control of scab in a mid-ripening experimental peach block (‘Flameprince’) located at the USDA-ARS Fruit and Tree Nut Research Laboratory (Byron, GA). Chemical formulations were applied at each application date: 17 Mar (petal fall to 1% shuck split), 1 Apr (shuck split to 10% shuck off), 11 Apr, 18 Apr, 3 May, 9 May, 18 May, 24 May, 31 May, 9 Jun, 15 Jun, and 21 Jun (cover sprays). Treatment regimens were a non-treated control, two applications of Bravo Weather Stik FL (petal fall and shuck split) followed by Yellow Jacket Sulfur cover sprays (chemical standard), two applications of Abound (petal fall and shuck split) followed by Yellow Jacket Sulfur cover sprays, Yellow Jacket Sulfur at all application timings, Bravo at petal fall, Bravo at shuck split, Abound at petal fall, Abound at shuck split, Bravo at petal fall and shuck split, and Abound at petal fall and shuck split. Scab was severe on the non-treated control in this trial; all full-season spray regimens were effective for suppression of scab, but two applications of Abound at petal fall and shuck split resulted in near equivalent control to that of Abound at petal fall and shuck split followed by Yellow Jacket Sulfur cover sprays, suggesting that Abound may provide season long control even in the absence of cover sprays.

Last Modified: 7/30/2014
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