I've finally got enough plums to set this year to ask some questions about them. I'm spraying Surround this year to try to keep the PC off them. I missed a couple though and they've got bite marks already. Do I need to take those off or will they drop by themselves? Also do plums or apricots need to be thinned? I didn't get a huge amount of fruit set compared to the number of blossoms, likely due to the cold weather when they were blooming.