Blog Archives

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

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

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

Common Diseases of Spruce in Kentucky (PPFS-OR-W-24)

Spruce trees, particularly blue spruce (Picea pungens) and Norway spruce (Picea abies), are popular landscape trees in Kentucky. Unfortunately, these trees present problems for homeowners when they show evidence of poor vigor, dieback, or needle drop.  This publication discusses the

Posted in Featured Pubs & Videos

Apple Production Practices and Pest Management

During the past 10 years, orchard practices in Kentucky have changed dramatically. Many of these practices contributed to conditions conducive for diseases and pests. Growers began to shift from traditional plant spacing to high density plantings, increasing tree stress and

Posted in Fruit

To Spray or Not to Spray: Conundrum in Wheat

Many wheat producers in the state have already sprayed a fungicide to help protect against Fusarium head blight (scab).  However, some fields in the state were just nearing the beginning flowering stage (Feekes growth stage 10.51) when the May 9th

Posted in Grains

Watch for Seedling Diseases in Corn

Weather this spring has challenged corn farmers in Kentucky. Temperature swings and frequent rainfall have led to a wide range of corn growth stages, with some corn in early vegetative stages and some corn still in the bag. The cool,

Posted in Grains

Managing Corn Earworm Begins Early

Corn earworm is typically a pest of later-season sweet corn, so why should we bother with worrying about it in May? We are a long way off from the start of harvest, which usually begins close to the 4th of

Posted in Vegetables

Woolly Apple Aphids Flaring in Some Orchards

While I have not received reports yet of woolly apple aphid activity on apple trees, there were several commercial orchards last year with serious infestations. In some years, this can be attributed to wounds caused by periodical cicada, but it

Posted in Fruit

Revisiting the European Hornet in Kentucky

With the concern about the Aisan giant hornet reports in Washington State, there have been dozens if not hundreds of suspected reports to county offices and our department from across Kentucky. None of these were the Asian giant hornet, instead

Posted in Human Pests

Cultural Calendar for Commercial Blueberry Production (PPFS-FR-S-29)

Integrated pest management (IPM) includes the combination of biological, cultural, physical, and chemical tools in efforts to manage diseases and pests while minimizing risks associated with pesticides. Cultural practices are an integral part of an IPM program and should be

Posted in Featured Pubs & Videos

2020 Insect Trap Counts

Trap counts for major insect pests are provided by the Kentucky IPM Program. Traps are located at the UK Research and Education Center in western Kentucky and the UK Spindletop Farm in Lexington.  Below are trap counts for the current

Posted in Insect Trap Counts

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

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

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