Have you ever noticed tiny speckles, curled edges, or dull patches on your tree’s leaves? These subtle symptoms might be the work of leaf mites—microscopic pests that are common across Southern Ontario and often go unnoticed until their activity shows up on the foliage.
Leaf mites are very small arachnids, related to spiders and ticks, that feed on the surface tissue of leaves. While most are less than 0.2 mm in size and nearly invisible without magnification, their feeding can create noticeable signs on leaves, including:
Fine yellow or white speckles across the leaf surface
Patches of bronzing or dull discoloration
Curled, puckered, or slightly deformed leaves
Fine silk webbing in some cases, particularly with spider mites
These symptoms typically appear in the warmer months—from late spring through early fall—especially during extended periods of hot, dry weather.
In most residential settings, leaf mite activity is considered cosmetic. It may affect the appearance of trees, but it usually doesn’t pose a serious threat to long-term health—especially for mature, well-established trees. However, if the damage is widespread, appears year after year, or is combined with other stressors like drought or disease, it’s worth investigating.
You don’t need to take drastic measures if you notice mild symptoms. In many cases, a good spray from the hose can help reduce mite populations. Keeping your trees healthy through regular watering, proper pruning, and avoiding over-fertilization also helps reduce vulnerability. Natural predators like ladybugs can keep populations in balance, so using harsh chemical sprays is generally unnecessary.
If you’re unsure whether you’re dealing with mites or something else—such as fungal issues, nutrient imbalances, or insect pests—it’s always a good idea to have a professional take a closer look. At Adamson Tree Experts Inc., we offer trusted guidance and hands-on support to help homeowners maintain healthy trees throughout the season.
Think something might be affecting your leaves?
Give us a call to schedule a visit or learn more about our inspection and seasonal care services.
