Blog Archives

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

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

Aphids Common in High Tunnels and Fields

A number of aphid species are now common and attacking various crops in high tunnels, as well as vegetables in the field. Aphids (Figure 1) feed with piercing-sucking mouthparts and produce large amounts of honeydew, possibly resulting in the growth

Posted in Greenhouses/High Tunnels, Vegetables

New Resource: High Tunnel and Greenhouse Vegetable Crops Scouting Guide Website

The publication An IPM Scouting Guide for Common Problems of High Tunnel and Greenhouse Vegetable Crops in Kentucky was revised in 2018 as an online PDF/paper version. In order to improve access to this important scouting guide, the Veggie Scout

Posted in Vegetables

Blackleg of Potato

Potatoes are often one of the first crops planted into the vegetable garden. However, growers and gardeners alike should be on the lookout for blackleg disease. This disease can occur in both commercial and homegrown potatoes. “Seed” potatoes may be

Posted in Vegetables

Watch for Early Season Insect Pests on Cole Crops

Insects are now active on some vegetable crops, so producers should be monitoring their fields weekly during this early period. Plants are growing slowly, particularly transplants, until they become established. It is recommended that crops be scouted every week, and

Posted in Vegetables

New Cucurbit Downy Mildew Forecasting Site

The National Cucurbit Downy Mildew Forecasting site  (Figure 1) has undergone a complete update, and growers requiring alerts will need to re-register. Growers can register for e-mail and/or text alerts when cucurbit downy mildew (CDM) has been found in proximity

Posted in Vegetables