Plant Healthcare

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 […]

The Japanese Beetle and the problems they cause?

The Japanese Beetle and the problems they cause? The Japanese beetle and the problems they cause: is a highly destructive plant pest that can be very difficult and expensive to control. Feeding on grassroots, Japanese beetle grubs damage lawns, golf courses, and pastures. Japanese beetle adults attack the foliage, flowers, or fruits of more than 300 different ornamental and agricultural plants. Signs of Japanese Beetle Damage Japanese beetles feed on a wide variety of flowers and crops (the adult beetles attack more than 300 different kinds of plants), but in terms […]

Rhizosphaera Needle Cast

Rhizosphaera Needle Cast What is Rhizosphaera needle cast? Rhizosphaera needle cast is the most common disease of Colorado blue spruce in Wisconsin. It makes Colorado blue spruce unsightly and unusable in many landscape settings. The disease can also affect other conifers including black, Engelmann, Serbian, Sitka, and white (e.g., Black Hills) spruce. What does look like? The first noticeable symptom of Rhizosphaera needle cast is browning and loss of the innermost needles on lower branches of spruce trees. Often, the youngest needles at the tips of branches remain healthy. Rows […]

Proper Tree Planting Tips for Arbor Day

Proper Tree Planting Tips for Arbor Day Arbor Day, an April holiday that celebrates the planting and caring of trees, is a popular time for homeowners to add new trees to their landscapes. Before doing this, however, homeowners should consider advice from expert arborists to ensure the trees’ longevity. Too often, consumers waste hundreds of dollars on trees that will die because they were planted too deep, here are some proper planting tips for Arbor Day: “Proper planting is absolutely essential for the success of a transplanted tree, Using quality plants […]

3 Uncommon Fruit Trees that can Grow in Wisconsin

3 Uncommon Fruit Trees That Can Grow in Wisconsin When talking about fruit trees that commonly grow in the Midwest, people usually mention apples, cherries, pears, plums, peaches, raspberries, and strawberries. But in Wisconsin, growers typically plant trees less susceptible to the cold. Cherry trees, for example, are not highly recommended in this state. Does this mean that any close relatives of the cherry tree can’t grow in Wisconsin? Fortunately, there are uncommon fruit trees that can thrive in the relatively colder state. If you’re curious, here are some examples […]

Cracks Can Cause Hazards in Trees

Cracks Can Cause Hazards in Trees Inspection from industry-certified arborists can prevent severe property damage. But it might not take a storm or high winds to cause a cracked or rotted tree to fail under its own weight. Cracks Can Cause Hazards in Trees Homeowners worried about trees falling and damaging property should call a qualified arborist for an on-site inspection. Trees are genetically designed to withstand storms, but all trees can fail – and defective trees fail sooner than healthy trees. To a professional arborist, certain defects are indicators that a […]

Preparing Your Trees For Winter johnson-ops-tree-care

How often should I trim my trees?

How often should I trim my trees? The certified ISA Arborist at Johnson Ops Tree Care can help you determine how often an individual tree should be trimmed. It really depends on every case, but, here are some general guidelines to go by on”how often I should trim my trees?” Mature trees of any variety can be trimmed every 3-5 years. Younger trees should be trimmed every 2-3 years. Fruit trees can be pruned every year to help produce better quality and larger fruit. Evergreen trees can go many years […]

Help Your Trees Resist Pests

Help Your Trees Resist Pests There are numerous insects and microorganisms on your property. If this is news to you, don’t go running for the sprays and bug bombs. This is a natural and beneficial state. Insects and microorganisms are key components in plant-nutrient recycling and decomposition, natural pest control, and landscape-ecosystem health. A landscape without insects and microorganisms would be a very unhealthy environment, The trick is to balance the threshold of healthy plants with having too much of a good thing, which is when naturally occurring insects and […]

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