Due to work and health issues I have not done a dormant spray on my peach and apple trees this year. The buds are really swollen and ready to open in we get a couple more warm days. Is it OK to spray copper and horticultural oil ? I am thinking it should be fine, but would suck to be wrong. So want reassurance please.
#2 If I spray today and it rains tomorrow do I have full effect ?
Edit, Since I wasn’t getting an answer in time, (Dutch, mine is liquicop, so don’t know how to apply your info) I texted one of the best fruit growers I know and he said to go ahead, so it is done. I don’t like contacting people like him directly, I know he is a busy guy and I don’t want to be a pest. But he is a good guy and has always been friendly and generous with knowledge.