Environmental stress
Leaf sunburn
Leaf sunburn is permanent injury to foliage caused by light and heat exceeding the plant’s ability to protect and cool its tissues. It is…
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Plant problem library
Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Environmental stress
Napégés (sunscald)
A sunscald, vagyis napégés nem fertőző, környezeti eredetű növénykárosodás. Hideg téli napokon a déli és délnyugati törzs- vagy ágfelület felmelegszik, majd éjszaka gyorsan lehűl…
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Environmental stress
Hőmérséklet-ingadozás okozta stressz
A hőmérséklet-ingadozás okozta stressz nem fertőző növénykárosodás, amely akkor alakul ki, amikor a növény rövid időn belül túl meleg és túl hideg körülmények, illetve…
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Environmental stress
Frost heaving
Frost heaving is an environmental winter-injury disorder, not a pathogen. Repeated freezing and thawing creates ice lenses that lift surrounding soil and push shallow-rooted…
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Environmental stress
Winter desiccation (winter burn)
Winter desiccation, also called winter burn, is an abiotic dehydration injury of evergreen and semi-evergreen plants. Foliage continues losing water through winter sun and…
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Environmental stress
Late Spring Frost Injury
Late spring frost injury is a noninfectious environmental disorder caused when actively growing buds, leaves, flowers, shoots, or young fruit are exposed to freezing…
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Environmental stress
Freeze injury
Freeze injury is noninfectious damage caused when freezing temperatures or frost disrupt plant cells, buds, flowers, stems, roots, or water-conducting tissues. Symptoms may include…
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Environmental stress
Frost injury
Frost injury is cold damage caused when freezing temperatures expose tender plant tissues to ice formation, dehydration and cell rupture. Symptoms may appear as…
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Environmental stress
Chilling injury
Chilling injury is physiological cold damage caused by temperatures that remain above freezing but fall below a crop’s tolerance threshold. It is especially common…
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Environmental stress
Heat scorch
Heat scorch is not a contagious disease but a form of abiotic injury that develops when leaves lose water faster than roots can replace…
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Environmental stress
Heat stress
Heat stress is a noninfectious environmental disorder that occurs when high air or soil temperatures, intense sunlight, hot wind, and rapid water loss overwhelm…
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Environmental stress
Poor drainage stress (waterlogging)
Poor drainage stress is an environmental disorder caused by soil or potting media that remains saturated for too long. Water displaces oxygen from root-zone…
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