🩺 Plant problems
Detailed guides for 50+ plant diseases, pests, nutrient deficiencies, and environmental stresses. Each covers identification, organic and chemical treatment, and prevention.
🍄 Fungal disease (17)
Fusarium wilt
Fusarium oxysporum
Verticillium wilt
Verticillium dahliae
Brown rot
Monilinia fructigena / M. laxa
Esca / grapevine trunk disease
Phaeomoniella chlamydospora + Phaeoacremonium spp.
Black rot of grape
Guignardia bidwellii
Powdery mildew
Erysiphales (multiple species)
Botrytis / grey mold
Botrytis cinerea
Rust disease
Pucciniales (multiple)
Apple scab
Venturia inaequalis
Black spot of rose
Diplocarpon rosae
Septoria leaf spot
Septoria spp.
Anthracnose
Colletotrichum spp.
Shothole disease
Wilsonomyces carpophilus (Stigmina)
Cherry leaf spot
Blumeriella jaapii
Cytospora canker
Cytospora spp. (Leucostoma)
Cellar mold (post-harvest fungi)
Penicillium / Aspergillus / Rhizopus spp.
Maple tar spot
Rhytisma acerinum
🦠 Oomycete disease (5)
🦠 Bacterial disease (4)
🐛 Pest (24)
Box tree moth
Cydalima perspectalis
Codling moth
Cydia pomonella
Colorado potato beetle
Leptinotarsa decemlineata
Cherry fruit fly
Rhagoletis cerasi
Tobacco hornworm
Manduca sexta / Helicoverpa armigera
Spider mites
Tetranychidae
Whitefly
Trialeurodes / Bemisia
Mealybugs
Pseudococcidae
Thrips
Thysanoptera
Vine weevil
Otiorhynchus sulcatus
Cutworms
Agrotis / Noctua spp.
Leaf-eating caterpillars
Lepidoptera larvae
Voles
Microtus arvalis
Bird damage on fruit
Turdus / Sturnus / Pica spp.
Wireworm
Agriotes spp. (Elateridae)
Carrot rust fly
Psila rosae
Root-knot nematode
Meloidogyne spp.
Aphids
Aphidoidea
Scale insects
Coccoidea
Snails and slugs
Gastropoda
Fungus gnats
Bradysia spp.
Earwigs
Forficula auricularia
Fruit flies
Drosophila spp.
Leaf miners
Liriomyza / Phyllonorycter spp.
🧪 Nutrient deficiency (10)
🌡️ Environmental stress (14)
Hail damage
abiotic — mechanical hail impact
Frost damage
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Overwatering
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Underwatering / drought
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Compacted soil
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Heat stress
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Wind damage
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Drought stress
abiotic — chronic water deficit
Road salt damage
abiotic — NaCl spray/runoff
Sunburn
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Low humidity stress
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Transplant shock
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Root-bound (pot-bound)
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Chlorine in tap water
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