Why does your Aesculus chinensis have sudden leaf drop? Diagnose the cause and fix it with our step-by-step guide.
The larvae of the leaf casebearer moth feed on the leaf tissue, creating small rolled-up cases that eventually cause premature browning and sudden defoliation. This is a common pest issue for Aesculus species during late spring and summer.
Chinese Horse Chestnuts have high water requirements and are sensitive to dry spells; sudden leaf drop is a defensive mechanism to reduce transpiration during water scarcity. This often occurs after a period of prolonged heat without adequate soil moisture.
Fungal pathogens can cause necrotic spots on leaves that eventually lead to premature abscission, especially in humid or overly wet conditions. The fungus thrives in cool, wet springs and can trigger rapid leaf loss if the infection is widespread.
Excessive soil moisture and poor drainage lead to the decay of the root system, preventing the tree from transporting water to the canopy. This results in sudden wilting and leaves dropping even if the surface soil appears damp.
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