Why does your Aesculus hippocastanum have sudden leaf drop? Diagnose the cause and fix it with our step-by-step guide.
Larvae of this moth mine between the upper and lower epidermis, causing necrotic blotches. As the damage progresses through the leaf surface, the tree prematurely sheds leaves to prevent further energy loss.
This fungal pathogen causes dark, irregular spots that expand and coalesce. Large-scale necrosis of the leaf tissue leads to rapid senescence and premature abscission during warm, wet periods.
Horse Chestnuts are sensitive to moisture deficits. During prolonged dry spells, the tree will drop leaves as a survival mechanism to reduce transpiration and preserve core hydraulic pressure.
Soil-borne oomycetes attack the root system, compromising the tree's ability to transport water. This leads to sudden, widespread leaf drop that often starts with wilting of the leaflets.
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