Bleeding canker on tree bark
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Bleeding canker on tree bark
Bleeding canker on a horse chestnut tree (Aesculus hippocastanum). Where this pathogen has been active, bark, cambial tissue and the phloem (sugar conducting tissue) are destroyed. If this damage spreads round the trunk then more general effects will be seen, namely yellowing of leaves, early leaf fall, failure to fruit and damage to the crown of the tree. Research suggests that a bacterium may be responsible. The disease affects trees ranging in age from young saplings to mature trees. It is estimated that some 35, 000 to 50, 000 trees are already infected over a widespread area. Photographed in Regents Park, London, UK
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6292253
© GEORGETTE DOUWMA/SCIENCE PHOTO LIBRARY
Aesculus Hippocastanum Bark Bleed Bleeding Damage Damaged Diseases Horse Chestnut Illness Pathogens Pathology Plant Pathology Sick Sickness Trunk Wood Pathogen
EDITORS COMMENTS
This print captures the devastating effects of a bleeding canker on the bark of a majestic horse chestnut tree in Regents Park, London. The pathogen responsible for this destructive disease has wreaked havoc on the tree's bark, cambial tissue, and phloem, leading to their destruction. If left unchecked, this damage will continue to spread around the trunk, resulting in more widespread consequences. The visible symptoms of this ailment are evident as yellowing leaves and premature leaf fall. Additionally, the affected trees fail to bear fruit and suffer damage to their crowns. Research suggests that a bacterium may be accountable for this distressing condition that affects trees at various stages of growth - from young saplings to mature ones. Alarming statistics estimate that between 35,000 to 50,000 trees have already fallen victim to this insidious disease across a wide area. This photograph serves as a poignant reminder of nature's vulnerability and highlights the urgent need for effective measures against such pathogens. Captured by Science Photo Library in collaboration with experts in plant pathology and botany, this image showcases both the beauty and fragility of our natural world. It stands as an important visual record documenting not only the biological impact but also emphasizing our responsibility towards preserving these invaluable ecosystems for future generations.
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