leaf spot
Plant tissue discoloration
Leaf spot is a plant disease marked by discolored, often circular patches on leaves.
Various fungi and bacteria cause leaf spots, which appear as brown, black, yellow, or water-soaked areas that may spread or merge.
Gardeners use the term both for the symptom and the diseases that produce it: The roses have leaf spot again.
Areas of damaged tissue
- necrosisLocalized cell death
- chlorosisChlorophyll deficiency in plants
- infectionPathogen invasion causing illness
- symptomsIndicators of disease
defoliation · blotch · speckle · yellowing · scorch · wilting · canker · blight
Asexual reproductive bodies
- myceliumFungal filament network
- hyphaeFungal filamentous structures
- mildewFungus from dampness
- rustIron oxide coating
fungicide · sporulation · fruiting bodies · overwintering · humidity · moisture · spread · mycology
Chemical that kills mold
- sprayingDispersing liquid as mist
- preventionStopping something before occurring
- treatmentCare for an ailment
- crop rotationAlternating field plantings yearly
sanitation · pruning · removal · disposal · airflow · spacing · scouting · monitoring
Plant's leafy covering
- deciduousSheds foliage seasonally
- evergreenRetains foliage year-round
- ornamentalFor beauty, not function
- perennialRecurring each year
annual · cultivar · shade trees · fruit trees · vegetable crops · garden plants · nursery · greenhouse
Gram-negative rod-shaped bacterium
- haloLuminous ring overhead
- bactericideSubstance killing harmful microbes
- contaminationIntroduction of impurities
- quarantineIsolation preventing disease transmission
lesions
Areas of damaged tissue
- necrosisLocalized cell death
- chlorosisChlorophyll deficiency in plants
- infectionPathogen invasion causing illness
symptoms · defoliation · blotch · speckle · yellowing · scorch · wilting · canker · blight · mosaic
spores
Asexual reproductive bodies
rust · fungicide · sporulation · fruiting bodies · overwintering · humidity · moisture · spread · mycology
fungicide
Chemical that kills mold
- sprayingDispersing liquid as mist
- preventionStopping something before occurring
- treatmentCare for an ailment
crop rotation · sanitation · pruning · removal · disposal · airflow · spacing · scouting · monitoring · early detection
foliage
Plant's leafy covering
- deciduousSheds foliage seasonally
- evergreenRetains foliage year-round
- ornamentalFor beauty, not function
perennial · annual · cultivar · shade trees · fruit trees · vegetable crops · garden plants · nursery · greenhouse · plant health
pseudomonas
Gram-negative rod-shaped bacterium
- haloLuminous ring overhead
- bactericideSubstance killing harmful microbes
- contaminationIntroduction of impurities
- farm hazardsdrought, frost damage, flood, hail damage, frost
- lawn problemsbrown patch, bare spots, dead grass, dead spots, brown spots
- crop problemsblight, drought damage, crop disease, root rot, wilting
- fungal diseasescandidiasis, histoplasmosis, blight, powdery mildew, downy mildew
- garden problemsaphids, beetles, blight, mildew, rot
- plant afflictionsblight, mildew, rot, wilt, root rot