Honey bees and other pollinators forage for nectar and pollen on a wide range of flowering plants, including some of our most common turfgrass weeds such as dandelion, white clover, ground ivy, speedwell, chickweed and a host of others. If any of these flowering weeds are present at noticeable levels, it may be wise to […]
Most of Indiana experienced cooler than normal temperatures over the last week, with good amounts of precipitation providing very good growing conditions for cool-‐season turf. However, green-‐up of warm-‐season grasses has been slow, so we have a relatively mixed bag for insect development and damage. The cooler temperatures and ample rainfall should help mask insect […]
Last month, a commercial landscape manager in Oregon made an off label application of dinotefuran to flowering linden trees resulting in the death of more than 25,000 bumblebees and immediate action by the Oregon Department of Agriculture to implement a six month ban on all dinotefuran products labeled for landscape use http://www.oregon.gov/ODA/docs/pdf/news/130627dinotefuran.pdf The labels […]
As the green industry continues to have a large impact on Indiana and the nation, Purdue University has assembled an outstanding team of researchers, extension personnel, and educators that are dedicated to solving problems and helping meet the needs of Indiana residents. One segment of the Indiana green industry that continues to provide a significant […]
This season continues to challenge our traditional thinking about insect seasonal ecology and management. Indiana and neighboring states are currently witnessing serious billbug infestations with late instar billbug larvae already present in the soil. This activity is easily 2-3 weeks ahead of normal. We advise all turf managers to take a close look at areas […]
With the very mild winter that most of Indiana experienced so far, we are being asked about its effect on insect populations for this year. The consensus among turfgrass entomologists is that although insect populations were probably not especially hurt by low temperatures this winter, they probably have not benefitted that much either. Insect pests […]
In addition to earthworms, there are several insects that can create small mounds of soil above the surface of turfgrass. Usually such mounding is of minimal consequence and, in fact, is beneficial to turfgrass environments as it accomplishes the same thing as cultivation, aeration and top-dressing – only on a very small scale. On occasion, […]
Zoysia grass is a warm-season grass that is being more frequently used in warm, humid and transitional regions. As zoysia is becoming more frequent in our state we are learning more about the pests that attack it. The photograph below was taken of a stand of zoysia in the southern part of Indiana. It was […]
Sod webworms may cause damage to closely mowed turfgrass early in the spring. Damage, similar to that depicted in the photos below, may be seen on golf tees and greens. The overwintered caterpillars become active when the temperatures warm up in the spring and begin to tunnel and feed. They are mostly active at night, […]
The following letter and pictures were sent to us for identification. There was a buzz of follow-up letters and communication afterward indicating that maybe this is not just an isolated occurrence. I have enclosed the initial letter, accompanying photographs and the return response in hopes that this is of value to others noticing the same […]
Hunting billbug is becoming a significant problem in parts of southern Indiana where zoysiagrass is grown. These insects typically have two generations per year in this part of the Midwest with the larvae of both generations being capable of causing significant injury to turf. Sporadic adult hunting billbug activity has already been observed in the […]
As frequent users of pesticides, it is imperative that turfgrass professionals understand the terminology surrounding their formulation and use. For example, when we talk about ‘multiple targeting’ we are referring to an attempt to control more than one pest with a single application of pesticide. Timing of application as well as placement and formulation is critical to success. To time a […]
Superintendants and lawn care professionals in the southernmost counties of Indiana should be advised that adult billbug activity has already been documented at one of the monitoring sites in the Evansville area. Mr. Jeff Sexton, Assistant Superintendant at Rolling Hills Country Club in Newburgh, Indiana captured his first billbugs adults of the year last week. […]
There are literally thousands of fertilizers and fertilizer/pesticide combinations available to homeowners and professionals. Therefore, we can’t recommend how many pounds of a specific fertilizer to apply, but rather we must recommend fertilization rates in pounds of nitrogen per thousand square feet or lbs N/1000 sq ft. You can use our fertilizer calculator at www.agry.purdue.edu/turf/fertcalc/Fertilization%20calc.html […]
This summer saw some extensive billbug damage in many parts of Indiana. Obvious damage to Kentucky bluegrass in the central and northern parts of the state are not uncommon and can usually be attributed to the bluegrass billbug. However, reports of severe damage to Zoysiagrass in the Evansville area really caught my attention. Zoysiagrass is […]
The presence of three potentially serious white grub pests of turfgrass and ornamental plants were confirmed this year during surveys conducted by the Turfgrass Entomology and Applied Ecology Laboratory at Purdue University and the Indiana Cooperative Agricultural Pest Survey with the help of several golf course superintendents, concerned citizens and one very keen graduate student […]
Reports of grub damage are becoming more frequent this week. A number of reports of damage have come from northern IN where moisture conditions have created ideal conditions for grub damage in spite of preventative insecticide applications. If grub damage and live grubs are confirmed, insecticide applications are likely justified to limit future animal feeding […]
It seems that the Japanese beetles have been arriving early for the last few years but this year is truly an exception. The first Japanese beetles of the year were observed in central Indiana on the 3rd of June. This is a full week earlier than we have EVER seen them here before. Normally, Japanese […]
It appears that our unseasonably warm spring has pushed the activity of many insects as much as 2-3 weeks ahead of traditional expectations. Among the turfgrass insects that are showing up early this year are the billbugs. These insects over-winter as adult weevils and become active in the spring when soil temperatures reach about 50°F, […]
The presence of two potentially serious white grub pests of turfgrass and ornamental plants has recently been confirmed in three northern Indiana counties; Porter, St. Joseph and Allen. The European chafer and Asiatic garden beetle are similar in biology to their cousins, the masked chafer and Japanese beetle, yet differ enough in behavior, habitat and […]
