Birch tree desease
The leaves of the tree have become yellow in August. Pictures are enclosed. We would like to have a diagnosis of the problem and how to remedy it. Name, age and/or size of plant: Birch tree, 10 years old; ~20 feet high When was the problem was first noted: a month ago (mid-August, 2015) What part of the plant is affected? Leaves have become yellow Have symptoms progressed or changed? No Growing conditions (full sun, part shade, shade, windy, salt spray, etc.): Full sun Soil problems (compacted soil, construction activity, poor drainage); None Pesticide and fertilizer applications: None Photos are included. We suspect, from doing some research, that the problem could be Bronze Birch Borer. There are 3 other birch trees in the backyard, which do not show, yet, such symptoms.
Based on your photos of the trunk it is possible you may be dealing with the bronze birch borer. It is recommended that you contact your extension service for more information http://extension.osu.edu/lao