Blog Archives

Marginal Oak Leaf Fold Galls Can Pack A Punch!

Leaf Fold Gall Midge Thickened edges of oak leaves are caused by abnormal tissue growth stimulated by chemicals produced by the leaf fold gall midge (Figure 1). These growths contain small fly maggots that feed and develop within the galls

Posted in Landscape Trees & Shrubs

Managing Bagworms

Whenever pests of landscape plants in the eastern U.S. are rated, bagworms invariably land in the top ten. Bagworms are most commonly found on evergreens (Figure 1), but they will feed on deciduous hosts, too. Bagworm feeding should be about

Posted in Landscape Trees & Shrubs

Lace Bugs – One Potential Cause of Bleached Leaves

Lace bugs use their sucking mouthparts to feed on plant sap. Damage ranges from a few scattered tiny white-to-yellow spots to bleached-white leaves that drop prematurely. Common lace bug species in Kentucky feed on azalea (azalea lace bug); hawthorn, cotoneaster,

Posted in Landscape Trees & Shrubs

The Dark Side of Black Root Rot in Ornamentals

Black root rot can affect a wide range of ornamentals in home and commercial landscapes, nurseries, and greenhouses. Black root rot is commonly observed on Japanese and blue hollies, inkberry, pansy, petunia, and vinca. Black Root Rot Facts Symptoms are

Posted in Landscape Trees & Shrubs, Ornamentals

Tree Wounds – Invitations to Wood Decay Fungi

Wood decay leads to loss of tree vigor and vitality, resulting in decline, dieback, and structural failure. Wounds play an important part in this process since they are the primary point of entry for wood decay pathogens. While other factors

Posted in Landscape Trees & Shrubs

How Dry Seasons Affect Woody Plants

Water is an essential component to plant mass and is vital to growth, carbohydrate production, and nutrient transport. During periods of below-average rainfall or when rain distribution is uneven, plant health may decline (Figure 1). Drought conditions or inadequate water

Posted in Landscape Trees & Shrubs

Fall Webworm 2.0

Colonies of fall webworm caterpillars work together to encase terminal foliage of over 100 species of forest trees, shade trees, and shrubs in silk (Figure 1). Then, they feed together in this shelter for 4 to 5 weeks, expanding it

Posted in Landscape Trees & Shrubs