Recently, white prunicola scales (Pseudaulacaspis prunicola) were detected on Prunus during a DNR nursery inspection. This is a significant scale pest of woody ornamentals and fruit trees in eastern states, but it is currently not established in Indiana. It is primarily a pest of cherry, lilac, and privet species. Its total reported host range spans[Read More…]
Alicia Kelley
Milkweed is a popular choice in urban landscapes as more citizens engage with monarch conservation efforts and strive to maintain pollinator-friendly landscapes. This past month I have seen numerous images of aphids found on milkweed plants from all over the state. Homeowners are concerned that the infestation will negatively affect the monarch butterflies that rely[Read More…]
Recently a homeowner in Hamilton County posted on the Indiana Native Plant Society Facebook page with concerns about aphids, mites, and apple scab in her maple and oak trees. She asked for a second opinion and treatment options for these pests. I reached out to the homeowner and requested permission to collect samples from the[Read More…]
Blight, Leafminers, and Moths: The Plight of Boxwoods Boxwoods (Buxus spp.) were introduced into the United States during colonial times, and still today they are one of the most popular evergreen shrubs used in landscapes. They are frequently selected for hedges and topiaries because they are easily trimmed into geometric shapes. They were also easy[Read More…]
Hoosiers are in for a special treat this spring. If you have lived in Indiana for more than a year, you have probably grown accustomed to the singing of cicadas in the later days of summer. However, in some years, cicadas will emerge in the spring. This occurred in 2021 when most of the state[Read More…]
Black vine weevil (Otiorhynchus sulcatus) is a serious pest of several ornamental and fruit plants, such as azalea, Cyclamen, caneberries, yew, rhododendron, grape, and strawberry. It is not a widespread issue, but when they occur, infestations can be devastating to a grower. A few larvae can be lethal to a Rhododendron, and the foliage feeding[Read More…]
It’s that time of year when we remind everyone to watch for spotted lanternfly (SLF) infestations. Spotted lanternfly is an invasive insect first detected in Pennsylvania in 2014, and has since spread throughout the eastern USA. Its preferred host is the invasive Tree-of-Heaven, but it also feeds on a wide range of important plant species,[Read More…]
The hemlock woolly adelgid (Adelges tsugae) continues its eastward spread across the US. In 2022, seven new counties were added to the distribution map of this invasive insect. While it is not present in Indiana yet, it is confirmed throughout the eastern USA from northern Georgia to Maine, extending west into Michigan, Ohio, and Kentucky.[Read More…]
The problem There is another invasive species close to Indiana that landscaping and nursery professionals should look for. Box tree moth (Cydalima perspectalis) is native to East Asia, and was first detected in 2021 in New York. Detections in Michigan in 2022 have resulted in a quarantine zone for boxwoods (Buxus spp.) in the state.[Read More…]
If you spend any time reading about native landscapes, you will quickly find numerous articles and guides for plants that are good for pollinators. Many native pollinator species are in decline, and choosing plants that support their lifecycle is a great way homeowners and landscapers can engage with the effort to improve their populations. However,[Read More…]
