I have about 14 old apple trees that I am trying to rejuvenate. I released, pruned and fertilzed them last spring. Some of the trees did produce limited fruit. Quite a few of them are infested with sometype of insect. Can anyone recommend an insecticide to spray on them this spring?
I have accesss to a power sprayer mounted on an ATV. I would like to buy a concentrate some I can make it multiple times and keep the cost down. Also when do I start spraying and how often should I spray the trees?
Thanks for the help.