Hello,

The sudden decline of your crabapple tree could be due to several factors.

Environmental Stressors:

The cement poured nearby could have impacted the tree’s roots, affecting its health.

Weed block and rocks might alter soil drainage and aeration, potentially stressing the tree.

Diseases and Pests:

Inspect for Signs of Disease: Check the leaves for lesions, curling, and yellowing. Check for spots on the leaves, cankers, or oozing sap on the bark.

Pests like aphids or scale insects could also be present.

One common issue in Michigan is apple scab, caused by the fungus Venturia inaequalis. This leaf spot disease can lead to serious leaf drop on susceptible crabapple trees. The fungus overwinters in infected leaves from the previous season, which then release spores in spring. These spores can infect new leaves, causing olive-colored spots that eventually turn brown and lead to premature leaf drop. Some crabapple varieties are more susceptible than others. Remember that some leaf drop during summer may not be fatal, especially if the tree still produces beautiful flowers in spring. More information at these links:

Why is my crabapple tree losing leaves? - MSU Extension

Crabapples can be a star in your landscape - MSU Extension

Crabapple trees can suffer from fungal diseases like apple scab or bacterial infections like fire blight. If you see signs of apple scab or fire blight, consider appropriate management strategies. More information at these links:

Apple scab - Integrated Pest Management (msu.edu)

Fire blight - Integrated Pest Management (msu.edu)

Water and Nutrient Availability:

Ensure the tree receives adequate water, especially during dry periods. Drought stress can weaken trees. Consider fertilizing the tree to support its recovery. Consider soil testing to assess nutrient levels. Check out this link:

Get Started | MSU Soil Test

Structural Damage:

The broken branch from last year may have weakened the tree overall. Given the large branch breakage last year, it’s also possible that the tree is still recovering from that stress. Additionally, the cement poured nearby and the weed block and rocks under the tree may have impacted its root system. To address this, consider the following steps:

Root Health: Assess the impact of the cement and weed block on the root system. If necessary, consult an arborist to evaluate the roots. To find an arborist in your Zip Code go to this link:

Find an Arborist (treesaregood.org)

Mulching: Remove any weed block or rocks around the base of the tree. Mulch with organic material to improve soil structure and moisture retention.

Observation: Monitor the tree closely for further changes and consult a local arborist if needed.

If possible, consult with a the MSU Plant & Pest Diagnostics Lab. I recommend you send all your images by e-mail to the MSU Plant & Pest Diagnostics Lab for a confirm and precise identification. The experts there can also provide you with the best treatment options. Their email is <personal data hidden> - Please include your name – The lab will let you know if they need a sample sent. FYI – The lab may also ask for additional images too.

Their website is at this link:

Plant & Pest Diagnostics (msu.edu)

Their Contact Information is at this link:

Contact Us - Plant & Pest Diagnostics (msu.edu)

If the lab wants you to submit a sample, this link will explain the details on submitting a sample to MSU Plant & Pest Diagnostics Lab:

Submit Samples - Plant & Pest Diagnostics (msu.edu)

I hope this helps!