Symptom	Plausible Causes	Suggested Treatment
Blackened fruit	Environment or Disease Fire blight
Brown spots	Environment or Disease Anthracnose, apple scab, bacterial leaf spot
Browning	Human Causes Blossom end rot Environment or Disease Brown rot of stone fruit, cedar apple rust, shot hole Pests Fruit flies
Cracking	Human Causes Excessive/irregular/inadequate watering Environment or Disease Apple scab, bacterial leaf spot, peach leaf curl
Crescent shaped scars	Pests Plum cuculios	Bloom Kaboom™
Deceased fruit crop	Human Causes Blossom drop, hardpan, inadequate watering, nitro deficiency Environment or Disease Black root rot complex, peach leaf curl, red stele, ringspot viruses
Disappearing fruit	Pests Mice, opossums, raccoons, squirrels
Distorted fruit	Human Causes Irregular watering Environment or Disease Apple scab, bacterial leaf spot, peach leaf curl, viruses Pests Apple maggots, codling moths, sawflies, thrips
Dried out and shriveled fruit	Environment or Disease Bacterial wilt, brown rot of stone fruit
Fruit drop	Human Causes Inadequate watering, too cold, too hot, too little fertilizer Environment or Disease Anthracnose, apple scab, bacterial wilt, brown rot of stone fruit, peach leaf curl, powdery mildew Pests Codling moths, fruit flies, leaf rollers, mealy bugs, nematodes, sawflies
Irregular or scabby fruit skin	Environment or Disease Apple scab, potato scab, shot hole Pests Thrips
Orange spots	Environment or Disease Rusts, including cedar apple rust
Partially eaten fruit	Pests Birds, cutworms, mice, opossums, raccoons, slugs, snails
Soggy areas	Human Causes Blossom end rot Environment or Disease Brown rot of stone fruit
Tunnels and holes	Pests Codling moths, cucumber beetles, cuculios, earwigs, fruit fly maggots, leaf rollers, sawflies, wasps, wireworms
Undersize fruits	Human Causes Irregular/inadequate watering, pollination problems Environment or Disease Apple scab, powdery mildew, strawberry leaf spot, verticillium wilt, viruses Pests whiteflies
White or gray fuzzy growth	Environment or Disease Gray mold, powdery mildew
Wormy fruit	Pests Apple maggots, codling moths, oriental fruit moths, peach twig girdler borers