Late blight on a potato plant

Late blight on a potato plant

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Caption: Late blight on a potato plant (Solanum tuberosum). This blight is caused by the water mould Phytophthora infestans. The spores of this fungus lie dormant on tubers under the soil during the winter. They then spread rapidly in warm and wet conditions. Early symptoms include the appearance of dark blotches on leaf tips that turn brown, as seen here. Later, white mould appears under the leaves and the tubers develop dark regions, leading to the collapse of the whole plant. Late potato blight is highly contagious and notoriously difficult to control once it sets in. It has been known to devastate entire crop fields across Ireland. Photographed in Colorado, USA.

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Keywords: agricultural, agriculture, american, biological, biology, botanical, botany, close-up, colorado, contagious, contaminated, countryside, crop, crop damage, decay, decayed, decaying, disease, diseased, diseases, farm, farming, fungal, fungal growthdetail, fungus, infected, infection, invasion, leaf, leaves, mold, mould, mouldy, mycology, nature, north america, north american, pathogens, pathology, phytophthora infestans, plant, potato, potato blight, solanum tuberosum, stem, united states, us, usa, vegetable

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