Rick’s PHC Certified Arborists is proud to be the first business people contact whenever they want a reliable tree arborist in West Chester, PA. Our tree care experts work with hundreds of residents and business owners who find pear trellis rust and other diseases brought on by unpredictable weather patterns.
An early fall, early summer, or inconsistent humidity from dry and wet weather cycles can cause rust diseases for various tree species. We work hard to establish cultural control and help trees of all ages maintain the health of their leaves and digestive systems.
We will outline the features of pear trellis rust in this explainer and discuss when help from a licensed arborist is necessary to prevent tree death.
What Are Signs You Have Pear Trellis Rust in Your Home Garden?
Arborists also refer to pear trellis rust as European Pear Rust because it was prevalent in European countries for centuries until traders brought it into North America in the early 1990s. It comes from fungal pathogens called Gymnosporangium sabinae and fuscum, sub-species of the Gymnosporangium rust that infects millions of trees in the United States.
West Chester has a low instance rate of pear trellis rust, but arborists still see it in many commercial and residential landscapes. The disease affects pear and juniper trees, and its symptomology is easy to spot.
How Pear Trellis Rust Infects Pear Trees
Pear trellis rust usually infects pear trees in late May. It develops enlarged yellow and brown spots with a diameter of one or two centimeters on its foliage.
Black dots will emerge at the center of these spots, appearing like warts eating through the leaves. Spore-producing structures that look like twig cankers will grow after two months. It will mummify fruits and adjacent wood and produce grey strands that release spores, infecting surrounding trees. This infection can kill branches, thin crowns, and cause other problems.
How Pear Trellis Rust Infects Juniper Trees
Pear trellis rust infects juniper trees in wet seasons that have torrential rainfall or dry ones that have high humidity. It can live on branches and leaves for two years.
Jelly-like masses will emerge on juniper branches and release spores that will stay dormant until the following spring. Pear trellis rust does not adversely affect juniper trees.
When to Call an Arborist
You usually do not need to call an arborist when you find pear trellis rust on your juniper trees. However, if you want to plant pear trees, here are a few things we can help with:
- We can plant pear and juniper trees more than 150 meters apart to prevent transmission. The distance can depend on the average wind speeds in your area.
- We can remove brush from infected trees so they do not sporulate and spread to neighboring plant life.
- We can select rust-resistant junipers and pear species, like J. squamata or J. communis, to prevent infection.
Get Expert Help Today
Call Rick’s PHC Certified Arborists at 610-840-2655 for more tree wellness tips today, and prevent pear trellis rust from invading your home garden.
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