Hi Gerry, I was reading the jobs to do in May ,I was wondering what spray to use on my apples and pear trees.The blossoms are already on the trees ,so would it be allright to spray them.hope to hear from you soon . Rosemarie.
You can spray with a fungicide containing the active ingredient myclobutanil, or use captan. Any garden centre would have some of these.
Do not spray when the blossoms are open as some products can affect bees and other pollinators.