Johnson Ops Tree Care Blog

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 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 […]