Food & Drink1 min ago
flowering cherry problem
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For more on marking an answer as the "Best Answer", please visit our FAQ.I think it may well be caterpillars, possibly winter moth, march moth or mottled umber moth, caterpillars, they are not always easy to spot and may have even finnished feeding now and gone down into the soil to pupate. Adult insects emerge around late October to early April, the femails are wingless and crawl up the trunks to lay eggs under the leaves. You can reduce the amount of femails by fitting sticky grease bands around the tree/s, stakes too if you have them, you should be able to buy these at any good garden centre. You may also be able to kill the egge with 'winter wash or better still spray young caterpillars with permethrin, pirimiphos-methyl or fenitrothion.
Another possible cause of holes in some fruit tree leaves is 'shothole' a fungal disease ( Stigimina carpophila) this can be treated with 'Bordeaux mixture' during the summer. Good luck.