Symptom	Plausible Causes	Suggested Treatment
Bleached blossoms	Human Causes Sunscald
Brown or black buds	Pests Psyllids, rose midges
Brown or black buds	Pests Psyllids, rose midges
Brown spots on petals	Environment or Disease Camellia flower and petal blight
Browning blossoms	Environment or Disease Camellia flower, petal blight, blight Pests Thrips
Damaged buds	Pests Spotted cucumber beetles
Discolored blossoms	Environment or Disease Aster yellows, viruses Pests Thrips
Distorted blossoms	Environment or Disease Aster yellows, mosaic viruses
Few or no blossoms	Human Causes Inadequate/nitro deficiency, too much shade Environment or Disease Aster yellows, bacterial leaf spot Pests Budworms
Gray mold on blossoms	Environment or Disease Gray mold
Holes chewed in petals	Pests Curculios, earwigs, grasshoppers, Japanese beetles, slugs, snails, spotted cucumber beetles
Lush foliage, small blossoms	Human Causes Too much nitrogen, too much shade
Partially opened buds	Pests Thrips
Seedling failure	Human Causes Excessive/inadequate watering, transplant failure Environment or Disease Damping off Pests Armyworms, birds, cutworms, flea beetles, grasshoppers, millipedes, root maggots, springtails, voles and wireworms
Shriveled blossoms	Human Causes Inadequate watering Environment or Disease Brown rot of stone fruit
Small blossoms	Human Causes Inadequate watering, nitro deficiency Pests Lace bugs