Japanese maple scales (JMS) attack a wide variety of trees and shrubs. They are common on dogwood, elms, flowering fruit trees, maples, magnolias, lilac and roses. Heavy infestations can kill tree branches. Unlike the closely related soft scales, these insects will be dry and not coated with sticky liquid excrement. All stages of this scale…Read more about Getting a Grip on Japanese Maple Scale[Read More]
Resources for landscapes and gardens in the Midwest
Landscape Report
Found 530 Articles
Roses are a popular landscape and garden plant in Indiana. Black spot, caused by the fungus Diplocarpon rosae, is the major foliar disease of roses in Indiana. Infected leaves develop black spots, turn yellow and drop prematurely from the plant. Premature defoliation decreases plant energy reserves and results in reduced flowering of roses as well…Read more about Reduce Defoliation From Rose Black Spot[Read More]
There is much speculation on why trees finally just go past the point of no return and die. There are many causes of tree death, but the most common is environmentally induced death often aggravated by some opportunistic pest. However, how the tree dies, well, that’s a scientific and physiological process.
Ascochyta blight is a sporadic disease that can infect Kentucky bluegrass, tall fescue and perennial ryegrass. Outbreaks are closely tied to high rainfall or irrigation events in mid to late spring, and drainage patterns. If the lawn is irrigated, Ascochyta can be a sign of too much irrigation. Current rainfall events are providing a prime…Read more about Ascochyta blight: Conspicuous but Usually Cosmetic[Read More]
When we see round holes in the bark of a tree we often think the cause might be due to wood boring insects or bark beetles. However, that is not always the case. Small holes arranged in neat, uniform rows and columns on the trunks of trees or woody shrubs are usually caused by sapsuckers,…Read more about Rows and Rows of Holes[Read More]
On the third Thursday of every month, the national Climate Prediction Center releases their 3-month climate outlook for temperature and precipitation. These outlooks are presented as the level of confidence (i.e., probability of occurrence) for conditions to be above or below normal. Since last fall, these outlooks have been consistently favoring above-normal temperatures and precipitation…Read more about Cool and wet conditions now predicted over next few months.[Read More]
To effectively control Taphrina leaf curl fungicides must be applied before bud swell. If you remember seeing red, curled, distorted, leaves on Prunus spp. last year (Figs 1,2) and wondered what might have caused this symptom, the answer is most likely Taphrina leaf curl. Taphrina is a fungal disease that survives in bark and bud…Read more about Taphrina Leaf Curl on Ornamental Flowering Peaches and Nectarines[Read More]
One of the most common diseases found on boxwoods is Volutella blight and dieback, caused by the fungi Pseudonectria foliicola and P. buxi. Both fungi are considered weak pathogens, always around but not causing much damage until plants are injured or stressed, rarely infecting otherwise healthy plants. Volutella blight alone usually doesn’t kill boxwoods, but…Read more about Volutella Blight and Dieback of Boxwood[Read More]
Determining the cause of dieback and decline symptoms in landscape trees can be very difficult due to the many cultural, environmental, and biological factors that could be involved. The first place you should look for a culprit when dealing with this type of tree problem is the base of the trunk and the roots. Stem…Read more about Stem Girdling Roots[Read More]
Offering 27 virtual, on-demand sessions from the IGE 2022 Live Educational Program Only available until May 31st, so sign up now! UNABLE TO ATTEND OUR IN-PERSON EVENT IN JANUARY? NEED TO EARN CCHS/CEUS? THIS VIRTUAL PROGRAM PROVIDES A GREAT OPPORTUNITY TO GAIN VALUABLE KNOWLEDGE AND EARN CREDITS ON YOUR SCHEDULE, AT YOUR OWN PACE. Click here…Read more about 2022 Indiana Green Expo Available Virtually! Sign up now for 27 education stations and receive CCH’s[Read More]
Surflan (oryzalin) is a part of many preemergence weed control programs. Being in the dinitroaniline (DNA) herbicide family (along with trifluralin, pendimethalin, prodiamine, and others), this product controls many weeds with minimum phytotoxicity to landscape plants. Oryzalin is also on the lower end of preemergence herbicide pricing, thus increasing the use of this product. You…Read more about What Happened to Surflan (oryzalin)?[Read More]
Galls are gnarly-looking problems for plants and now is the perfect time to be looking for galls on woody ornamentals in the landscape. Without their leaves, these abnormal growths on branches can be easy to spot as you look through the open canopy (Fig 1). There are many different types of galls or gall-like structures…Read more about All of the Galls in the Landscape[Read More]
Throughout the decades, many landscape fads have ended in failure. Dame’s rocket, wintercreeper, and purple loosestrife are a few examples of beautiful and vigorous ornamentals that have wreaked havoc on our natural ecosystems. Nursery professionals, as well as consumers, were unaware of the potential negative impacts of non-native species, often marketed as vigorous, hardy, or…Read more about Planting for our Future: Landscaping with Natives[Read More]
Hair ice, also called ice wool, frost beard, and gnome beard is ice that appears like silky hair (Fig. 1) but forms on dead wood colonized by the fungus Exidiopsis effusa. It is fairly uncommon and not reported in Indiana…but who has been looking for it? Think of the bragging rights! It has been found as…Read more about Of Gnome Beards and Witch’s Butter[Read More]
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