Boron deficiency may be corrected with a single foliar application of 3-4 pounds per acre of solubore at petal fall and first cover. Boron can also be added to the soil at about 2 to 3 pounds of actual boron per acre per year before bloom, but foliar application of solubore is more effective. Always run a soil and leaf analysis to determine the rate of boron application. Do not apply boron to peaches, because they are very sensitive, and do not mix boron with calcium chloride at very small volume because boron will precipitate. To avoid precipitation of boron, mix the boron in the tank first then add calcium chloride.
Pears can benefit from boron application at the same rate as apples.
While at the international dwarf tree fruit meeting this year in New York, I saw some onion bag material being used as spreader aids. It was very easy to use, and the grower really bragged on it. If you're training young trees, you might want to try it. As apples develop beyond bloom, scout orchards for evidence of primary scab infections on fruit and on cluster leaves. If apple scab infections are detected, then continue spraying protectant materials until hot dry summer weather becomes the norm.