Title: Influence of Canopy Orientation on Fruiting of 'Anjou ' Pears and Postharvest Urea Spray on Ovule Longevity and Fruit Set of 'Comice ' Pears.

The effect of canopy orientation on fruiting performance of 'Beurre d'Anjou ' pears (Pyms communis L.) and postharvest urea spray on ovule longevity and fruit set of 'Doyenne du Cornice ' pears were studied. Hedgerows of 'Beurre d'Anjou ' pear trees planted in 1969 in two orientations north-south (N-S) and east-west (E-W) were used to study the effect on pear fruiting. The trees were spaced 1.3 x 3.7 m, trained to a central leader, and mechanically pruned to a tree wall 3.7 m high and 1.8 m wide at the base with a wall angle of 170 from the vertical. Flower density (FD), flower buds per unit branch cross-sectional area (BCSA), was lowest on the N wall of the E-W rows in 1990 and on the S wall of the same rows in 1991. In both years, N-S rows had higher FD. Fruit set (FS), fruit per flower buds, was highest on the S wall and lowest on the N wall of the E-W rows, whereas, the E and W walls of the N-S rows were intermediate. Crop density (CD), fruit per unit BCSA, had a similar pattern as FS with more fruits on the S wall and less on the N wall of the E-W rows. However, CD was mor