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Plant Problems & Diseases
Identify and treat common plant problems. Complete guide to pests, fungi, nutritional and environmental diseases.
Categories
Symptoms
Or diagnose by the symptom your plant is showing:
See more: Symptoms →Common Problems
Emergency (123)
SOS: serious problems requiring immediate action
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Pests
(65) Whitefly Woolly Beech Aphid Flea beetle damage Woolly Aphid Scale Insects Whiteflies Mealybugs Wax Scale Psyllids Foxglove Aphid Animal Feeding Damage Aphids Black Scale Root-Knot Nematodes Aphids Leafminers Broad Mites Slugs and Snails Caterpillars Mealybugs Armored Scale Shield Bugs Leaf Miners Currant Aphid Insect Damage Spider Mites Thrips Fungus Gnats Spider Mites Thrips Fungus Gnats Caterpillars Root-Knot Nematodes Aphids Onion Aphid Shivaphis Mechanical Damage or Infestation Scale Insects Insect herbivory Eurytetranychus Aploneura Scale Insects Mechanical Damage or Herbivory Protopulvinaria (Soft Scale) Phylloxera Cottony Scale (Pulvinaria) Insect Chewing Damage Eriophyid Mites Mechanical damage or pest chewing Eulecanium Holes in leaves from chewing pests Thrips damage Bay sucker damage Lace Bug (Stephanitis pyrioides) Sarucallis Leaf Miners Thrips or Mite Infestation Horse Chestnut Leaf Miner Azalea lace bug Leaf chewing damage Bamboo Spider Mites (Stigmaeopsis) Chewing insect damage Mechanical insect damage Leaf Miner Damage Strawberry Mite
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Fungal
(66) Rust Cherry Witches' Broom Powdery Mildew Root Rot Black Spot Gray Mold (Botrytis Blight) Anthracnose Peach Leaf Curl Brown Rot Sooty Mold Fusarium Wilt Damping Off Rust Leaf Spot Downy Mildew Pythium Root Rot Phyllachoraceae Southern Blight Verticillium Wilt White Mold Cercospora Leaf Spot Phytophthora Root Rot Phytophthora Blight Canker Clematis Wilt Cladosporium Leaf Mold Ramularia Leaf Spot Shot Hole Disease Crown Rot Plum Pockets Alternaria Leaf Spot Septoria Leaf Spot Cercospora Leaf Spot Gray Mold (Botrytis Blight) Apple scab Chestnut Blight Phyllosticta Leaf Spot Black Spot Anthracnose Powdery Mildew Grey Mould Willow Anthracnose Pestalotiopsis Leaf Spot Cercospora Leaf Spot Boxwood Blight Downy Leaf Spot Oak Leaf Blister Phomopsis Tip Blight Southern Blight Passalora Leaf Spot Colletotrichum orbiculare Fusarium Wilt Entomosporium leaf spot Peach Scab Graphiopsis chlorocephala Brown patch Septoria Coniothyrium concentricum Brown Spot Cherry Leaf Spot Fruit Rot Sphaerulina Leaf Spot White Rust (Albugo portulacae) Colletotrichum gloeosporioides Rhytisma Tar spot of maple
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Nutrient Deficiency
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Environmental
(67) Severe Defoliation Severe Defoliation and Dormancy Leaf Drop (Environmental Stress) Physical Leaf Damage Low Light Stress Underwatering Low Humidity Stress Edema Sunburn (Sun Scorch) Leaf Tip Necrosis Heat Stress Salt Buildup Cold Damage Overfertilization Root-Bound Poor Air Circulation Soil pH Imbalance Chemical Burn Transplant Shock Overwatering Mechanical Damage (Cuts and Wounds) Mechanical Damage Underwatering Pesticide Damage Lack of Light Mechanical Damage Mechanical Damage and Leaf Scarring Physical Damage and Scarring Mechanical damage and scarring Crown Dieback (Environmental Factors) Spent Flower Spike Physical Damage and Water Stress Physical Damage or Herbivory Etiolation and Leaf Drop Dieback (Dead Wood) Physical or Mechanical Damage Heavy Dust Accumulation Dust Accumulation Physical or Mechanical Damage Physical scarring Mechanical damage and minor pest herbivory Physical scarring and mechanical damage Mechanical scarring Spent Inflorescence Mechanical damage and dust accumulation Mechanical Damage Mechanical damage and farina disturbance Water spots Mechanical Damage Water Spots Mechanical Damage Physical Leaf Damage Spent flower stalk Artificial velvet coating Branch Dieback and Leaf Yellowing Mechanical damage and leaf detachment Dormancy or Severe Dehydration Mechanical leaf damage Mechanical Damage and Scarring Spent Flowers Fragmentation and Browning Mechanical Damage and Environmental Stress Physical Scarring and Mechanical Damage Mechanical Damage and Scarring Physical Damage and Leaf Tears Physical Damage and Dry Edges Mechanical Leaf Damage and Scarring
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Bacterial
(16)Identifying Plant Problems
Plant problems can have various causes: pests, fungi, nutritional deficiencies or inadequate environmental conditions. Correctly identifying the cause is the first step to effective treatment.