Take a leaf to a nursery. NOT Home Depot or Wallmart or anything like that. A real nursery! They will tell you what the issue is. I did that and I found that I was overwatering and I had thripes! The thripes have been sprayed and are gone, and I now use my soil sleuth (google that) purchased online to check the dampness in the containers and in the ground.

kimmsr - One needs to click the small pictures (thumbnails) to go to the larger size. - - - rajani, I see mostly minor chewing damage, but not enough to set back the trees' growth. Need to expect some holes. To locate the potential chewers, I'd go out about 10 PM or so, and look closely at the leaves, tops & bottoms. The yellowing leaves on the cherry -- those are the oldest leaves. Not to worry as long as only a few. The pear -- very difficult to see detail because the focus missed the leaves. The citrus -- something is very busy chewing on those leaves! Also suspect environmental problem because of distorted leaves -- that can be "normal" early season -- also apparent yellowing of top leaves. Some basic questions: 1. where do you live? (That info can give us some clues.) 2. Your soil looks like it could benefit from a thick mulch of compost, perhaps 3 inches. That will help maintain moisture and slowly release needed fertilizer elements. 3. Have you ever had a professional lab do a soil test? (The results could give you quite a few answers.) 4. Although I don't fertilize my trees, some of yours may find it useful. (Refer to #3 just above.)

I'd consider chiggers.

Think the chewing insect was long gone when you took those pix.