Short communication Nondestructive leaf area estimation of ‘Niagara’ and ‘DeChaunac’ grapevines

Leaves were sampled from Vitis labruscana Bailey cv. ‘Niagara’ and the interspecific hybrid ‘DeChaunac’ grapevines several times during a 2-year investigation of leaf area estimation. Linear measurements of leaf length and width were made and correlated with leaf area measurements made with a computerized image processing system. For each cultivar, nine regression equations were derived and compared. Most models resulted in high ðR 1⁄4 0:90Þ coefficients of determination, but the power model using leaf width provided a high R and relatively low standard error of the estimate (‘Niagara’: area 1⁄4 0:637W, R 1⁄4 0:9821, and S:E: 1⁄4 10:58; ‘DeChaunac’: area 1⁄4 0:672W, R 1⁄4 0:9632, S:E: 1⁄4 5:67). Use of single-variable equations facilitates simple, rapid, and accurate estimation of ‘Niagara’ and ‘DeChaunac’ leaf area. Published by Elsevier B.V.