Blog Archives

Rhizosphaera Needle Cast May Lead to Skimpy Spruce

Rhizosphaera needle cast is often to blame for brown or thin spruce in the landscape. In Kentucky, Rhizosphaera needle cast is the most common disease of spruce; it also affects some pine species. This disease causes needle drop on lower

Posted in Landscape Trees & Shrubs

Downy Mildew of Grape

Downy mildew is an important disease of commercial and backyard grapes in Kentucky. Warm, wet, humid weather conditions favor infection and disease development. When flowers, clusters, and shoots become infected by downy mildew, yield losses result. This disease may also

Posted in Fruit

Vegetable Diseases to Scout for: Southern Blight

Southern blight, or basal stem rot as it is sometimes called, most commonly affects tomato, pepper, cucumbers, beans, and cabbage, but has a very wide host range and can infect many crops. The disease can occur in any system where

Posted in Vegetables

Ornamental Pear Damaged by Fire Blight

During March or April, pathogenic bacteria infected flowers or young shoots. Now, shepherd’s crooks (Figure 1) and spur dieback (Figure 2) are becoming more prominent. Often, damage is not noticed until later in the season when branches die completely.  

Posted in Fruit

Avoid Introduction of Boxwood Blight into the Landscape

Boxwood blight can be devastating to American boxwood cultivars, which are common in the Kentucky landscape. Complete defoliation can occur within a week and plants can die within a single growing season. Use of tolerant cultivars, cultural practices, and fungicides

Posted in Landscape Trees & Shrubs

Dogwood Anthracnose Spotted

Anthracnose of dogwood is a common problem in Kentucky. Symptoms on landscape and forest dogwoods often first appear during wet periods in late spring. If left unmanaged, the pathogen spreads, eventually resulting in plant death.  Selection of resistant varieties and

Posted in Forest Trees, Landscape Trees & Shrubs

EPA Cancels Sale and Use of Some Pesticides

Last week the EPA announced the cancelation of the registration for several pesticide registrations. These cancellations were voluntarily requested by the registrants.  What this means is that any distribution, sale, or use of these products is subject to this cancellation. 

Posted in Pesticide Topics