Peach twig borer
Identification tip: Shoot strikes caused by peach
twig borer generally first appear early in the season before
leaves have reached two inches long. There is no frass on
outside of the entry hole, even when strike is fresh.
To find the larva and positively identify the damage, pull
the shoot apart.
Oriental fruit moth
Identification tip: Shoot strikes caused by Oriental
fruit moth first appear a little after those of peach twig
borer when the leaves are about 5 to 8 inches long. Entry
holes for fresh strikes may have excrement (frass) on the
outside of the hole. To find the larva and positively identify
the damage, pull the shoot apart.
Plant bugs and thrips
Identification tip: Damage caused by plant bugs (Calocoris,
Lygus) is very similar to that caused by thrips. Feeding
generally occurs early in the season on developing shoot
tips low in the tree. There is no tunneling in these shoot
tips, just the wilting of a leaves at the shoot terminal.
Affected growing tips may eventually die, causing lateral
buds to push and shoots to become bushy.