Johnson Ops Tree Care Blog

Industry news, tree health tips, recent projects, and more.

Fire Blight

Fire Blight Fire blight is the most destructive bacterial disease affecting plants in the rose family, including apple, pear, crabapple, hawthorn, cotoneaster, mountain ash, quince, rose, pyracantha, and spirea. It can kill or disfigure a tree or shrub, depending on the susceptibility of the host and weather conditions. What does it look like? Blossoms, leaves, twigs, and branches of plants affected by fire blight can turn dark brown to black, giving the appearance of having been scorched in a fire. The blighted blossoms and leaves tend to stay on the […]

Chlorosis

Chlorosis Chlorosis is a common nutritional disorder of many woody ornamentals in Wisconsin, particularly in the southern and eastern parts of the state. Pin oaks are most commonly affected by chlorosis, although many other trees and shrubs (e.g., white oak, red maple, white pine, and Rhododendron spp.) are also very susceptible. What does it look like? Symptoms of chlorosis are easy to distinguish from those of other diseases. Affected leaves turn yellow, except for the veins, which remain green. In severe cases, foliage may turn brown and die. Symptoms can […]

A Simple Guide To Wasp Nests In Trees

A Simple Guide To Wasp Nests In Trees Maintaining the upkeep of healthy and functional plant life requires knowledge of the ins and outs of the insects that can build a home on your trees. Wasps often live in your gardens and can be seen among the tree branches. Knowing more about a wasp’s behavior can help you keep safe in your garden. For any homeowner who owns a garden with trees, keeping on top of the ecosystem is vital. When a nest is spotted, people will rush to call […]

Buyer Beware When Purchasing Tree Care

Buyer Beware When Purchasing Tree Care. Summer wind storms, though damaging, can often bring out the best in a community. Neighbors, even strangers, help each other cope with aggravations and property damage left in the wake of a storm. Unfortunately, storms also bring out the worst in a community – fast-buck artists looking to profit from the misfortunes of others. How can homeowners protect themselves when they need to hire a tree care company to clean up after a storm? With thousands of dollars at stake, not to mention the integrity and appearance […]

Oak Wilt

Oak wilt is widespread in southern Wisconsin but in much of northern Wisconsin it is still a new and uncommon diseas Oak wilt kills thousands of trees each year in forests, woodlots and urban areas, or can even attack and kill healthy trees. The disease is a particularly serious problem for species in the red oak group such as northern red, northern pin and black oaks. Once wilting symptoms are apparent on a red oak, the infected tree will lose most of its leaves and die within approximately one month. […]

Dutch Elm Disease

Dutch Elm Disease Dutch Elm Disease is caused by two fungi, Ophiostoma ulmi and Ophiostoma novo-ulmi. These fungi are moved from tree to tree by two species of elm bark beetles that breed in elm trees, by root grafts that form between roots of adjacent elm trees, and by human activities such as prunin What does Dutch elm disease look like? Wilting leaves, often on a single branch, are the first symptoms of Dutch elm disease. Yellowing of leaves and leaf drop follow. Trees may quickly lose all of their […]

The Japanese Beetle

MEET THE PEST The Japanese Beetle is coppery bronze and beautiful, but the mess it leaves behind, with its voracious appetite, it tears through foliage, flowers, and roots of more than 300 plant species. Both as adults and as grubs (the larval stage), Japanese beetles are destructive plant pests. Adults feed on the foliage and fruits of several hundred species of fruit trees, ornamental trees, shrubs, vines, and field and vegetable crops. Adults leave behind skeletonized leaves and large, irregular holes in leaves. PEST TYPE Chewing insect (Popillia japonica) ORIGIN & DISTRIBUTION […]

Bur Oak Blight

Bur Oak Blight Bur Oak Blight is a fungal disease that is relatively new to our area and that we should be aware of. The blight first appears in June as purple-brown spots on the underside of Bur Oak leaf veins. In July, the spots expand, and purplish necrotic veins become noticeable on the upper leaf surface. Leaf veins are killed as the infection progresses and a characteristic wedge-shaped necrotic area develops on the leaf blade. The trees have a scorched appearance with the disease typically worse on the bottom […]

Vegetable Garden in the Ground or in Pots?

Are you contemplating starting a garden? Gardening is a productive and enjoyable hobby that results in a lovely landscape.There are a few various techniques to create a garden, but the most popular ones are planting in the ground and gardening in containers. Which gardening methods should you use? Vegetable Garden in the Ground or in Pots? What Is Ground Gardening? As the name suggests, ground gardening involves growing plants in the ground. The soil is typically tilled, after which it’s mixed with fertilizer to create an ideal growing environment. Seeds are then planted […]

Growing Strawberries

Choose location For growing strawberries first, choose an area that is free of perennial weeds. This area should also have full sun throughout the day. Strawberries also do best in sandy loam soil. If you do not have this type of soil, just find a well-drained area to plant. The soil should be prepared with 10 to 15 pounds of a starter fertilizer per 1000 square feet. YEAR 1 Spring Planting Strawberries should be planted around the 1st of May, or as soon as the soil can be worked. This […]

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