Blog Archives

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

Cleaning and Sanitizing Commercial Greenhouse Surfaces

Sanitizing surfaces is a critical step for greenhouse and nursery sanitation.  This is particularly important for sites where disease was a problem in previous crops.  Pathogens that cause plant disease can survive in debris, in soil, or on surfaces.  Cleaning

Posted in Greenhouses/High Tunnels

Biological Pest Management in Kentucky High Tunnel / Greenhouse Tomato Production Systems

Kentucky producers of tomatoes in high tunnel or greenhouse production systems manage several key arthropod pests to maximize their yields and profits.  An environmentally and economically sound management system for these pests is based on the following components: Sanitation and

Posted in Greenhouses/High Tunnels, Vegetables

Clean Up High Tunnels Now to Reduce Veggie Disease Next Year

Numerous important diseases of vegetables can overwinter more effectively in protected environments like greenhouses and high tunnels, as compared to field environments. These include foliar diseases like leaf mold, gray mold, and powdery mildews. In addition, soilborne diseases, like root

Posted in Greenhouses/High Tunnels

Watch for Thrips — They’re Abundant this Year

There have been several reports of high thrips populations attacking crops and bothering homeowners alike this spring (see KPN June 5, 2018, Thrips Can Be Cause of “Mystery Bites” and “Pool Miseries”). Despite their tiny size, various thrips species are

Posted in Greenhouses/High Tunnels, Vegetables

Vegetable and Tobacco Diseases to Scout for: Botrytis Gray Mold

Kentucky vegetable and tobacco growers should be on the lookout for Botrytis gray mold. This disease may occur in fields under humid conditions, but it is most common in greenhouses and high tunnels. Botrytis gray mold can also affect numerous

Posted in Greenhouses/High Tunnels, Tobacco, Vegetables

Watch for Mites in High Tunnels

There have been several reports of spider mites on high tunnel tomatoes this past week. This coincides with the onset of some much-needed warmer weather in the Commonwealth. Generally, higher levels of mites are more common with warmer weather. Ideally,

Posted in Greenhouses/High Tunnels

Mite Management in High Tunnels

As the weather begins to warm, mite activity is likely to increase in high tunnels and greenhouses. Due to their small size and cryptic habits, it is usually easier to initially scout for signs of their activity, rather than trying

Posted in Greenhouses/High Tunnels, Vegetables

Greenhouse/High Tunnel Pest Management: Getting Off to a Clean Start

Controlling arthropod pests in greenhouses can be a challenge since these protected environments provide ideal conditions for development of some common plant pests. Additionally, the structure itself excludes natural enemies from attacking these pests, allowing their populations to develop more

Posted in Greenhouses/High Tunnels

Managing Aphids in High Tunnels and Greenhouses

One of the more common pest issues across a range of vegetable crops in greenhouses is aphid management. Vegetable production in protected environments is generally used to extend seasons and during these times of the year problems with aphids are

Posted in Greenhouses/High Tunnels, Vegetables

Diseases to Scout for: Pythium Damping-off and Root Rot

Extended periods of cool, wet weather this spring may have you noticing symptoms of a common pathogen infecting plants: Pythium. This water mold pathogen particularly attacks seeds, seedlings, and young plants (Figures 1 and 2). Pythium is present at low

Posted in Greenhouses/High Tunnels, Tobacco, Vegetables

Mites/Miticides in High Tunnels

We are beginning to get some reports of spider mites on tomatoes in high tunnels. Mites are challenging pests to manage in greenhouses and high tunnels as they often go undetected when their populations are low. However, they reproduce quickly

Posted in Greenhouses/High Tunnels, Vegetables

High Tunnel White Fly Update

In the past week, there have been several reports of whiteflies, aphids, spider mites, and thrips attacking tomatoes in high tunnels or greenhouses. It is not unusual to have an upturn of insect activity in high tunnels as the season

Posted in Greenhouses/High Tunnels, Vegetables

Whiteflies in High Tunnels

High tunnel insect management can be challenging, and whiteflies (Figure 1) on tomatoes and other vegetable crops can be one of the more common challenges. While there are several species of whiteflies that we routinely find in high tunnels, silverleaf

Posted in Greenhouses/High Tunnels, Vegetables

Managing Mites and Miticides in High Tunnels

Mites can be challenging pests to manage in greenhouses and high tunnels.  This is partly due to their small size; mites can go undetected until their numbers build and damage becomes apparent.  We are fortunate to have several miticides available

Posted in Greenhouses/High Tunnels, Vegetables