DIPLODIA TIP BLIGHT PINE

WHAT ARE THE CAUSES?

When a mature tree is under stress and is then exposed to the Pinea fungus this is what causes Diplodia. The fungal infection attacks in multiple ways starting with new shoots growing on the plant then moving outward to affect the needles. Cells from the Pinea get left behind. Pycnidia (black fungal bodies) can be found at the base of the needles.

The fungal cells are also found on the new stems (pine shoot).This cell producing fungus is commonly mistaken for contamination caused by moth larvae. To determine if you have Diplodia or moth contamination, take a look for larvae tunnels near the shoot.

HOW TO MANAGE THE PROBLEM

1. Prune the infected area (Note: Do not prune middle of active season: late spring, early summer)-disinfect pruning tools after each use
2. Remove and destroy contaminated branches and shoots
3. Maintain the tree's health, stress worsens the disease
4. Have an arborist remove the contaminated tree to prevent further spread to surrounding trees

Diplodia Tip Blight thrives in wet weather conditions and makes for easy contamination.. The Diplodia cells are most actively produced in the early spring and fall, however they become most evident in later spring and summer. In the spring plants are more susceptible to fungal cells as new shoots are growing and elongating.