Blog Archives

Cucurbit Downy Mildew Confirmed in Kentucky

On July 27, 2021 cucurbit downy mildew was confirmed on cucumber in south-central Kentucky. Cucurbit downy mildew was reported in Knoxville, Tennessee last week and across the eastern and northeastern U.S.  Disease is likely widespread across the area. Hosts &

Posted in Vegetables

Cucurbit Mesotunnel Research Blog

We have been researching improved conventional and organic control strategies for cucurbit pests and diseases for more than 10 years to develop a practical system that producers can use effectively and dependably. This work have been conducted at the UK

Posted in Vegetables

Predicting Future Cucurbit Crop Disease Risk Using Disease History

Past disease presence can indicate a risk for the same disease this year. Many pathogens overwinter on infected plant material or as pathogen survival structures. Poor sanitation practices can lead to an increased risk of these diseases in the upcoming

Posted in Vegetables

Predicting Future Solanaceous Crop Disease Risk Using Disease History

Past disease presence can indicate a risk for the same disease this year. Many pathogens overwinter on infected plant material or as pathogen survival structures. Poor sanitation practices can lead to an increased risk of these diseases in the upcoming

Posted in Vegetables

Planning a Vegetable Garden

As spring approaches, it is time to start planning for this year’s vegetable garden. There are many items to consider when planning a garden, including decisions that can directly impact the potential for disease. Here are few areas to consider

Posted in Vegetables

Recommendations for Starting Disease-Free Vegetable Transplants

Many home gardeners and commercial growers have placed their seed orders or have last year’s saved seed safely tucked away. In the coming days or weeks, many growers will start those seeds in transplant trays. However, in some cases, seeds

Posted in Vegetables

Squash Vine Borer: The Hidden Pest

With most insect pests of vegetables, UK Extension Entomology recommends weekly scouting to determine the levels of infestation and to decide if an insecticide is warranted. Scouting will tell when the earliest stages arrive and at what levels. However, this

Posted in Vegetables

Cucurbit Downy Mildew Has Arrived in Kentucky

Late in the day on July 31, cucurbit downy mildew was found on cucumber in south-central Kentucky. Microscopy was used to confirm presence of the pathogen, by identifying its dark sporulation on the leaf surface (Figure 1) and oval, dark

Posted in Vegetables

Cucurbit Downy Mildew Creeping Closer to Kentucky

Cucurbit downy mildew was confirmed on winter squash in central Tennessee on July 24, so all Kentucky cucurbit growers should be on alert for this disease in their crops. Symptoms are shown in Figures 1 and 2, on cucumber and

Posted in Vegetables

Vegetable Diseases to Scout for: Anthracnose of Cucurbits

With cucurbit crop canopies beginning to close within planting beds, cucumber, cantaloupe, and watermelon growers in Kentucky should be scouting for anthracnose in their plantings. Prevention, early identification, and management will help reduce plant losses. Cause & Disease Development Anthracnose

Posted in Vegetables

Vegetable Diseases to Scout for: Botrytis Gray Mold

As we transition from crop establishment to production, vegetable growers should be scouting for Botrytis gray mold in their plantings. This disease may occur in the field under humid conditions, but it occurs at more damaging levels in greenhouses or

Posted in Vegetables

Vegetable Diseases to Scout for: Center Rot of Onion

Onion growers in Kentucky should have their eye out for bacterial rots of onion this week, particularly center rot of onion. Bacterial rots are common diseases of onions in Kentucky, and homeowners or growers not actively using preventative practices will

Posted in Vegetables

Mexican Bean Beetle in Gardens and Fields

Mexican bean beetle is an example of an insect pest that is often noticed only after considerable damage has been done. This is because it remains hidden on the undersides of leaves and feeds only on lower layers of leaves. 

Posted in Grains, Vegetables

Vegetable Diseases to Scout for: Tomato Spotted Wilt Virus

After a mild winter, vegetable growers, especially those producing crops in greenhouses, should be scouting for tomato spotted wilt virus (TSWV). This disease can affect tomato, pepper, potato, eggplant, lettuce, beans, and cucumber, along with more than 170 other plant

Posted in Vegetables

Timber Rot (White Mold) of Tomato

Numerous reports of timber rot, or white mold, of greenhouse tomato are coming in. Timber rot causes elongated bleached areas on tomato stems, often where the trellis line rubs against the plant, which progresses to kill the plant. Under humid

Posted in Vegetables