What type of insect causes large holes (about 1/2 inch in diameter) in tender pear tree leaves? What type of insect causes concave/round cuts (about 1/8 of an inch) around the edges of leaves?
Certified GKH Gardening Expert
Both kinds of damage sound like Japanese beetles. But occasionally, believe it or not, slugs also cause this kind of damage on tree leaves. If you are not seeing the pest, check the leaves at night for slugs.