Segment 2 of S4E26 Common tree diseases/problems - The Wisconsin Vegetable Gardener radio show

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In segment two Joey and Holly talk about Common tree diseases/problems

Common tree diseases/problems
Common tree problems/diseases
Emerald ash borer
Solution 1 — Prune back branches and stems that have been infested and destroy them to prevent further spreading. If more than 25% of the tree’s foliage or mass must be removed, seek the assistance of a certified arborist.
Solution 2 — When the infestation is in the trunk of the tree, call an arborist to evaluate the damage and determine a safe approach to halting the infestation.
Solution 3 — Prevent infestations by keeping your trees healthy. When you hear about an outbreak in your area, treat your trees with a bark insecticidal spray to deter the insects from making your tree its host.
Tar spots
Tar spot on maple and sycamore is not actually "tar" on the leaves, but rather a fungal disease. These diseases seldom are detrimental to the overall health of infected trees.Tar spots may cause premature defoliation but are not known to kill trees. Tar spots on maples are caused by fungi in the genus Rhytisma.
Symptoms first appear in late spring or early summer as infected leaves develop light green or yellow-green spots. During mid to late summer, black tar-like raised structures are formed on the upper surface of leaves within the yellow spots
Compacted soil
Problem: In our yards, trees often grow in compacted soil.
◦Our yard is our backyard getaway. We run, play, walk, and enjoy our yard constantly.
◦All that foot traffic, along with lawn mowers and construction projects, creates soil compaction. Plus, major soil compaction occurred when your house was built, so if your home is newer, it’s likely you’ll see this problem.
◦Compacted soil leads to stressed soil, crushed root, and restricted root growth.
Solutions: Loosen the soil to reduce compaction and stress on trees.
◦Vertical mulching replaces soil in the root zone.
◦Mix in organic matter to amend compacted soil.
Dutch elm disease
Fungal disease
Carried by bark beetles and then once the trees “vascular” system is infected, the disease moves around
How to manage Dutch elm disease
•Reduce the number of breeding sites available to the beetles through prompt removal of dead or dying elm wood with intact bark.
◦Branches infected with DED should be removed the same year the infection starts.
◦Trees with many branches infected with DED should be taken down.
◦Wood from DED infected elm trees should be buried, debarked, burned or chipped.
•Remove infected branches before the disease has moved into the main stem of the tree. All infected branches must b(continued)