Occasionally you'll hear this term—along with "microclimate" and "low yields"—when winemakers discuss the science of growing grapes (a.k.a. viticulture). Canopy refers to the foliage of the grapevine. Canopy management, it follows, involves the positioning, planting, training (binding the shoots of vines to the trellis), and pruning of grapevines in order to minimize the adverse effects of pests, disease, molds, mildew, and rot, as well as maximize quality yields.