TY - JOUR T1 - Control of Botrytis Bunch Rot of Ripening Grapes: Timing Applications of the Dicarboximide Fungicides JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 167 LP - 172 DO - 10.5344/ajev.1983.34.3.167 VL - 34 IS - 3 AU - R. C. Pearson AU - D. G. Riegel Y1 - 1983/01/01 UR - http://www.ajevonline.org/content/34/3/167.abstract N2 - Various dicarboximide fungicides at 0.84 kg to 1.12 kg (active ingredient)/ha when applied first at 5° to 7° Brix and then two weeks later, provided a high level of control of Botrytis bunch rot (Botrytis cinerea Pers.) of ripening grapes in New York State. Control was rarely improved by making two additional applications at 5% or 90% bloom and at bunch closing. Control provided by two late season applications of vinclozolin was improved significantly when an early season treatment of gibberellic acid at 25 mg/L was included. The use of only two sprays per season may lessen the selective pressure by these fungicides and thereby delay development of fungicide-resistant strains. ER -