I finally got fruit last year off of my very young trees. It was delicious except every plum had a white worm in them ... or should I say a "half" of a white worm. This year same thing while checking immature fruit. I also have brown spots. I was spraying pretty regurally except for as of recent ...I've become frustrated...Kind of gave up for this year. Also noticing a lot of insect activity...every leave more than half eaten. I did get fruit two consecutive year which I thought wasn't supposed to happen. Any feedback?