Most fruit tree spray directions call for spraying every ten to fourteen days and sooner if it rains. This time of year, it might rain every three of four days. Is is ok to spray that much and is it necessary. I have peaches, apples, plums, and pears and something usually infects all of them but the pears. I intend to be more religious with my spraying schedule this year - but not really sure about spraying after every rain all through spring.