Plant disease guides
Symptoms, causes and care for the 37 diseases, pests and growing problems Plantulus can spot. Not sure what you are looking at? Check a leaf photo.
Houseplants
Aloe
Aloe AnthracnoseA fungal disease that leaves sunken brown or black spots on aloe leaves, usually after the leaves stay wet for too long.
Aloe Leaf SpotSmall dark spots on aloe leaves, usually caused by fungi or bacteria taking hold on leaves that stay damp.
Aloe RustA fungal disease that marks aloe leaves with round yellow spots that turn brown or black, sometimes with rusty, raised pustules.
Aloe SunburnLeaf damage from too much direct sun or heat, often after an aloe is moved suddenly into a brighter spot.
Cactus
Money Plant
Snake Plant
Spider Plant
Garden plants and crops
Apple
Apple ScabA common fungal disease of apple trees that causes dark, velvety spots on leaves and corky scabs on fruit.
Apple Black RotA fungal disease of apple trees that causes "frog-eye" leaf spots, rotting fruit and cankers on branches.
Apple Cedar Apple RustA rust fungus that needs both apples and junipers (cedars) to complete its life cycle, leaving bright orange spots on apple leaves.
Bell Pepper
Cherry
Corn (Maize)
Corn (Maize) Gray Leaf SpotA fungal disease of maize that causes long, rectangular grey or tan lesions between the leaf veins.
Corn (Maize) Common RustA rust fungus that covers maize leaves in small cinnamon-brown pustules, usually in cool, humid weather.
Corn (Maize) Northern Leaf BlightA fungal disease of maize that causes long, cigar-shaped grey-green to tan lesions on the leaves.
Grape
Grape Black RotA fungal disease of grapevines that spots the leaves and turns berries into hard, black mummies.
Grape Esca (Black Measles)A wood disease of grapevines, caused by several fungi, that leaves "tiger stripe" patterns on leaves and can kill vines.
Grape Leaf BlightA fungal leaf spot of grapevines that causes irregular dark brown patches, usually later in the season.
Orange
Peach
Potato
Squash
Strawberry
Tomato
Tomato Bacterial SpotA bacterial disease that causes small dark spots on tomato leaves and raised, scabby spots on the fruit.
Tomato Early BlightA common fungal disease that causes brown target-like spots on the lower leaves of tomato plants.
Tomato Late BlightA fast-spreading disease that can kill tomato plants within days in warm, wet weather.
Tomato Leaf MoldA fungal disease of tomatoes grown in humid conditions, especially greenhouses, with mould under the leaves.
Tomato Septoria Leaf SpotA fungal disease that peppers tomato leaves with many small round spots, starting low on the plant.
Tomato Spider MitesTiny sap-sucking mites that speckle tomato leaves, often with fine webbing, in hot and dry conditions.
Tomato Target SpotA fungal disease that causes ringed brown spots on tomato leaves and fruit in warm, humid weather.
Tomato Mosaic VirusA virus that mottles tomato leaves light and dark green and stunts the plant. There is no cure.
Tomato Yellow Leaf Curl VirusA virus spread by whiteflies that makes tomato leaves small, curled and yellow and stops the plant setting fruit. There is no cure.
These guides are general information, not a diagnosis. Photos are examples from the datasets the model was trained on, credited on each guide. See the disclaimer.