TY - JOUR T1 - Sampling for <em>Botrytis cinerea</em> in Harvested Grape Berries JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 261 LP - 265 DO - 10.5344/ajev.1993.44.3.261 VL - 44 IS - 3 AU - J. J. MAROIS AU - A. M. BLEDSOE AU - R. W. RICKER AU - R. M. BOSTOCK Y1 - 1993/01/01 UR - http://www.ajevonline.org/content/44/3/261.abstract N2 - The effect of aggregation of disease on estimating the amount of Botrytis cinerea in harvested winegrapes was simulated using computer models. As the degree of aggregation was increased, the estimated amount of disease increased. This error was reduced when more samples were obtained. When multiple samples (90) were taken from gondolas containing machine- or hand-harvested berries and the amount of B. cinerea-specific antigen quantified with an immunoassay, the machine-harvested berries had a more uniform distribution of antigen than did hand-harvested berries. To obtain the same confidence of estimation of the level of disease, one would take at least two samples per each gondola for hand-harvested berries and one per each gondola for machine-harvested berries. ER -