Dothistroma Needle Blight On Landscape Pines

Dothistroma needle blight, also known as red band disease, is a common fungal infection several different pine tree species in Birmingham, Michigan. Caused by the fungus Mycosphaerella pini, this disease can weaken or even kill susceptible pine species, particularly Austrian pine, which is a commonly used landscape tree. The disease is less commonly found on white pines and Scotch pines.

The main symptoms of Dothistroma needle blight include:

• Reddish-brown spots on green needles
• Distinct brown to reddish-brown bands on needles
• Needle tips turning brown while the base remains green
• Premature needle shedding

In Birmingham's climate, Dothistroma needle blight typically becomes more noticeable in late summer or fall. However, new infections can occur throughout the growing season when spores spread via wind and rain.

To manage Dothistroma needle blight in Birmingham:

1. Maintain good air circulation around trees
2. Apply mulch to improve tree health
3. Avoid wetting needles when watering, use a soaker hose to water trees
4. Consider fungicide treatments to prevent further infection

Prevention is the key to keeping Dothistroma needle blight out of your landscape.

• Plant alternate evergreen species like Norway spruce or concolor fir
• Avoid planting susceptible pines near infected trees
• Sterilize pruning tools between trees
• Remove and destroy fallen infected needles

By understanding the symptoms and implementing proper management strategies, Birmingham residents can protect their pine trees from the devastating effects of Dothistroma needle blight and maintain healthy, vibrant landscapes.

If you notice discolored needles on your pine tree call Owen Tree and Lawn Care to have your pine trees inspected by an ISA Certified Arborist. The sooner the problem is diagnosed, the better the chances are that your tree can be saved.