Diplodia Tip Blight in Pennsylvania
MODERATEFungus
Diplodia Tip Blight is currently active in Pennsylvania. Watch your susceptible trees closely and act early.
About Diplodia Tip Blight
A common fungal disease of pines, particularly Austrian and Scots pines in landscape settings. Spores infect new shoots as buds open in spring. Repeated infections progressively kill branches from the bottom of the tree upward.
Symptoms to watch for
Stunted new shoots with short, brown needles still in their sheaths, dead shoot tips (candles), resinous cankers on branches, small black fruiting bodies at the base of dead needles, progressive lower-crown dieback
Trees at risk in Pennsylvania
Tracking one of these? Add it to My Yard to get alerts when threats go active near you.
Treatment options
Fungicide Application at Bud Swell
Copper-based fungicide or thiophanate-methyl applied just before bud break when new candles are emerging. Repeat application 7-10 days later. Timing is critical for effectiveness.
Prune and Destroy Infected Shoots
Remove dead and infected shoots during dry weather to reduce spore sources. Improve tree vigor through proper watering and avoid stress conditions.
Recommended Products & Tools
Helpful supplies for managing Diplodia Tip Blight. Always read and follow label directions, and confirm a diagnosis before treating.
Broad-spectrum protectant for many fungal leaf and bark diseases.
Preventive spray for needle cast, leaf spots, and blights.
Sharp, clean cuts to remove affected wood — a tree-care essential.
As an Amazon Associate, TreeIssues may earn a commission from qualifying purchases made through these links — at no extra cost to you.
Need help with Diplodia Tip Blight in Pennsylvania?
Find certified tree care professionals near you.
Browse all Pennsylvania arborists →Frequently asked questions
Is Diplodia Tip Blight in Pennsylvania?
Diplodia Tip Blight is currently active in Pennsylvania. Watch your susceptible trees closely and act early.
What does Diplodia Tip Blight look like?
Stunted new shoots with short, brown needles still in their sheaths, dead shoot tips (candles), resinous cankers on branches, small black fruiting bodies at the base of dead needles, progressive lower-crown dieback
What trees does Diplodia Tip Blight affect in Pennsylvania?
It affects Ponderosa Pine, Eastern White Pine. Susceptibility varies by species.
How do I treat Diplodia Tip Blight?
Options include: Fungicide Application at Bud Swell, Prune and Destroy Infected Shoots. Confirm the diagnosis before treating, and consider a certified arborist for high-value trees.