Resources for landscapes and gardens in the Midwest
Search Results: weed
Diagnosing herbicide injury on ornamental plants can be difficult due to the sheer number of cultivated plants and the number of active ingredients used around ornamentals. Modern cultivars of ornamental plants include characteristics much different from the species, so it’s important to know ‘normal’ to properly diagnose a problem. There[Read More…]
While fungi are responsible for many of our foliar disease problems, different fungal pathogens present as problems throughout the country, depending upon the host plant grown and the environmental conditions. This is a brief overview of several common types of fungal leaf diseases occur in Indiana and throughout North America[Read More…]
Pesticide drift can occur virtually anywhere — between neighboring farms, farms and residential properties, or neighboring residential properties. Whether it’s a next-door neighbor or a farmer who owns the field adjacent to your property, they have the legal right to apply pesticides to their property or property they lease. However,[Read More…]
When spring mulching occurs, most companies will apply a preemergence herbicide for extending weed control. It is well known that the combination of mulch and preemergence herbicides is a very effective method in controlling weeds (https://purduelandscapereport.org//article/cultural-plus-chemicala-good-weed-control-combo-in-landscape-beds/). When applying preemergence herbicides with mulch, which should be first for the most effective[Read More…]
Leaf blotch, also called red spot and measles, is a common disease of peony caused by the fungus Graphiopsis chlorocephala (=Cladosporium paenoiae). The disease has multiple names because there are multiple symptoms. Lesion on leaves and stems can vary from tiny red spots (“measles”) to larger brown or purple blotches[Read More…]
The Indiana Arborist Association will be hosting a virtual conference from Jan. 26-29, 2021, in lieu of its 73rd annual in-person meeting. The virtual event will offer a diverse group of speakers and topics in order to engage professionals, volunteers, managers and decision-makers alike. “As our organization gathers virtually together[Read More…]
Join us for the 2020 Turf and Landscape Seminar! Learn the latest research and best management practices from Purdue’s Green Industry Specialists. The seminar is available now until November 18th with a live question and answer session with the specialists on November 19th. All participants will receive a free copy[Read More…]
As the 2020 gardening year draws to a close, now is the time to ensure a successful gardening season next year, for you or your customers! Sanitation is a cornerstone of integrated pest management and is essential for good plant health management. Throughout the year, we have been plagued with[Read More…]
One of the most common weeds that present significant challenges to both landscapers and growers are thistles. There are several reasons that thistles are difficult to control, including thousands of viable seeds per plant (Fig. 1), rhizomatous growth characteristics (Canada thistle) (Fig. 2), and large root system (Fig. 3). There[Read More…]
The Purdue Landscape Report Team is excited to offer you an online learning opportunity on Wednesday, August 19th at 12:00 pm (Eastern) via Zoom and Facebook Live. This is part of our on-going, biweekly series. The topics and speakers will vary each session, so check out the newsletter every two[Read More…]
Hollyhock (Alcea spp.), an anchor plant for the back of the cottage garden, bloom mid-summer with numerous flowers on tall spikes, providing beauty for us, and food for bees, hummingbirds and butterflies. The most common varieties are biennial, taking two years to complete their lifecycle, although some persist as short-lived[Read More…]
Preemergence herbicides should be the primary tool for a landscape weed control program. The primary reasons to develop a strong preemergence herbicide program are 1) Decreased phytotoxicity (plant damage) to landscape plants and 2) Reducing the amount of times required to visit a property. With the difficulty of attracting quality[Read More…]
Many are familiar with Rhizosphaera needlecast of spruce. If you aren’t, please see these two articles by Janna Beckerman and Megan Haas for more information about the disease and it’s management on spruce. The common name for the disease, needlecast, describes the ultimate fate of the needles: they are cast[Read More…]
Gray mold (causal agent = Botrytis cinerea) is one of the most common diseases affecting bedding plants. Host commonly include (but are not limited to): begonia, carnation, chrysanthemum, cyclamen, geranium, impatiens, marigold, million bells, petunia, vinca and zinnia. Fortunately, gray mold is one of the easiest diseases to manage. By[Read More…]
Soil is the ‘lifeblood’ of plant health. Many people tend to focus more on above ground portions of the plant than the below ground environment. We should always remember that a plant is only as healthy as its roots. Knowing the basics of soils will help in understanding the health[Read More…]
The presence of these hornets in the United States is could be bad news for honeybees and native insects alike but there’s no need to panic yet.
Usage of mulch at the base of trees is a very common and recommended practice to protect the trunk from mower damage, as well as improve root conditions by preventing weed and grass growth in the root zone. Mulch also increases moisture retention in the soil, and improves soil quality[Read More…]
The 2019 season provided challenges that were unexpected to the Green Industry, which included an abundance of rainfall followed by drought-like conditions, new invasive pests, concerns about glyphosate use, and many others. The Purdue Landscape Report focuses on timely articles that help Green Industry professionals make decisions for their business[Read More…]
If your hostas are looking a little ratty recently you’re not alone (all the photos here are from my garden). Hostas at this time of year tend to have marginal scorch, dieback, leaf spotting and yellowing . A variety of factors may contribute to these symptoms including environment, diseases and[Read More…]
White mold, caused by the fungus Sclerotinia sclerotiorum, is a specific fungal pathogen that infects several hundred species of plants from more than 75 different families, resulting in death of the infected plant (Fig. 1). Many of the most popular annuals and perennial plants have been reported to be susceptible to[Read More…]
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