This paper deals with adaptation and improvement of a previous model developed to predict amount of pesticide deposit within vine canopies. Tasks described here were aimed at analysing the effect of variation in the leaf area density (LAD) on both model predictions and deposits measured in the field. Tests were conducted in a vineyard during spring-summer 2001. Deposits on leaves and LAD were measured at several growth stages. After a description of the field tests, the outline of the model is briefly described and the influence of LAD on the results obtained with both methods discussed.