Leaves turning brown and dropping early is the most commonly seen symptom but others include oak trees lacking acorns, scorching leaves, tip burn and hypoxylon canker.
Texas A&M Forest Service uses a combination of remote sensing satellite imagery and on-the-ground observations to monitor the health and productivity of forests.
The agency uses High Resolution Forest Monitoring System (HiForm), a USDA Forest Service product, that uses satellites to produce Normalized Difference Vegetation Index (NDVI) change products to monitor changes in forests that result from severe weather, wildland fire, logging, insects and disease.
NDVI shows how green plants are. A change or deviation in NDVI means that trees are changing their chlorophyll signature, and showing either stress or mortality, even if it’s not yet evident for some regions.
As forecasters predict the drought to continue through November, landowners should remain diligent in caring for the health of their trees and forests. Continued monitoring is also critical to fully assess the overall impact and to determine the next steps, since trees may be going dormant and leaf out again in the spring.
Managed landscapes are generally far more resilient to extreme weather conditions, so practices that include planting locally adapted trees, managing invasive and providing supplemental water to high-value trees are important actions landowners can take.
For additional information on drought and trees, visit
https://tfsweb.tamu.edu/afterthestorm/drought/Contacts
Texas A&M Forest Service Communications Office, 979-458-6606, newsmedia@tfs.tamu.edu