Phytophthora leaf & twig blight

Phytophthora leaf and twig blight causes browning of leaves and death of twigs on affected plants. The disease spreads in wet conditions and favors areas with poor drainage. Remove infected branches. Improve air circulation around plants. Ensure proper soil drainage and avoid planting in low, wet areas. This blight is most damaging during cool, wet springs when flower and shoot development is rapid. Monitor plants closely during vulnerable periods.

Remove blighted tissue promptly, cutting well below visible symptoms. Improve air circulation by thinning dense growth. Avoid overhead watering, especially during bloom and new growth periods when tissues are most susceptible. For recurring problems, preventive fungicide applications timed to protect new growth can reduce infection, but cultural controls should be your first approach.