Physiological shothole

Physiological shothole causes leaf damage on susceptible plants like willow, creating the appearance of shot holes or perforations. This condition is not caused by a pathogen but results from environmental stress. No management practices have been proven to reduce physiological shothole. Maintain consistent watering and good cultural care. Monitor plants closely for other stresses. Monitor your plants closely and implement integrated management strategies. Prompt removal of infected material helps limit disease spread.

Prevention works better than treatment for physiological shothole. Choose resistant varieties when they exist, site plants where air moves freely, and maintain good sanitation by removing debris and infected material. When chemical intervention is necessary, timing matters more than product: apply protectants before the infection window, not after symptoms appear.