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 off. Loss of leaves or…Read more about Needlecast Diseases: Not Just a Spruce Problem[Read More]
Resources for landscapes and gardens in the Midwest
Landscape Report
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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 changing cultural conditions that are…Read more about Gray Mold of Bedding Plants[Read More]
Trees and shrubs can lose their leaves for many reasons. The maple tree in the cover photo is planted in a parking lot, and mulched incorrectly. The parking lot location gives the tree much less access to rainwater than a tree planted in a park-like pavement free location. Deep mulch piled like a volcano aggravates…Read more about Oystershell scale may be killing tree and shrub branches in urban tree plantings[Read More]
Jumping worms (a.k.a. snake worms, crazy worms, Amynthas spp.) While you’re gardening in the coming weeks keep your eyes peeled for jumping, wriggling worms. Asian jumping worms are spreading in the Midwest and they can do serious damage to your yard. Where are they from? No one is sure exactly how jumping worms were…Read more about Asian jumping worms: ID, impact, and prevention[Read More]
Biology: Prostrate Spurge (Euphorbia humistrata) is a summer annual broadleaf weed that can be found in dry/sandy and/or nutrient-poor soils along with compacted, weakened or disturbed turfgrass and landscape sites. Look for it first in driveways and sidewalks or in potted plants in a landscape or nursery as temperatures start to get warmer. Prostrate spurge can also…Read more about Spotlight on Weeds: Prostrate Spurge (Euphorbia humistrata)[Read More]
A mild winter, followed by a brief warm-up, caused many plants to flower or leaf out before one last freeze. Unfortunately, that succulent new growth is much more susceptible to frost and freeze damage. Freeze injury in many plants will occur when the temperature falls below 32° F (0° C) and the water within the…Read more about 2020 has jumped the shark![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 of landscape plants (Fig. 1)….Read more about Soil Basics for Improved Plant Health[Read More]
Earthworms are not the only wigglers in the soil beneath your feet. Nematodes, microscopic roundworms, can be found in soil across the globe (even Antarctica!) and are often a barometer of soil and environmental health. However, the nematodes we encounter more frequently feed on plants and cause us, as plant stock producers and consumers, a…Read more about Foliar Nematodes[Read More]
Join us May 12th at 4:00 pm (EDT) at this link: https://purdueextension.zoom.us/j/92562247848 The Purdue Green Industry Team and Indiana Nursery and Landscape Association would like to invite you to a virtual event for the Green Industry and other Agri-Businesses featuring United States Senator Mike Braun. He will be providing updates for Agri-Businesses from the federal…Read more about Current Issues in the Green Industry: Featuring Senator Mike Braun[Read More]
Black knot, caused by the fungus Apiosporina morbosa, is a recurring problem on Prunus species. Most Indiana fruit growers, both professional and amateur, have at one time or another observed the black, knot-like warty growths (Fig. 1) that often occur on the woody parts of plum and cherry trees. This fungal disease is one of…Read more about Black Knot Disease[Read More]
Tuesday, April 28th, 2:00 pm (Eastern) To join the meeting via computer: https://purdueextension.zoom.us/j/95573025468 Changes are happening within the Green Industry at a fast pace during the Covid-19 pandemic. In addition to the questions and stress of gearing up for the season, there are many new questions this year, such as: Can your business stay open? …Read more about Current Issues in the Green Industry: Coivd-19 Updates and Resources[Read More]
In a survey of Indiana produce growers conducted on April 2020, we found that 72% of them are planning to sell online. Their online strategy ranges from sales through emails, texts, e-commerce enabled websites, or online platforms that aggregate food vendors and buyers. The other 28% felt they lack the technical knowledge to transition online…Read more about Managing your social media during Covid-19[Read More]
As so many gardeners are staying at home these days, we’ve had more opportunity to enjoy the spring display. And then, perhaps inevitably, “normal” spring frost and freeze visited – some plants are vulnerable to damage. The amount of damage will depend on how far along they are in their development. Home fruit-growers may have…Read more about Assessing Freeze Injury on Horticultural Plants[Read More]
Day-to-day activities have changed every aspect of businesses throughout the country. The Green Industry is no exception, with changes implemented to maintain safe working environments for employees and their clients while being compliant with the state’s Executive Order. Due to the diversity of services and products that the Green Industry provides, there is no one-size-fits-all…Read more about Green Industry Businesses Share Protocols to Maximize the Health and Safety During the Covid-19 Pandemic[Read More]
Labor issues and timing of tree care activities have been and will continue to be impacted by federal and state rulings as a result of CoVid-19. As a result of social distancing and confusion surrounding “essential services”, many plant health care technicians and business operations have been suspended. As the season progresses, these labor suspensions…Read more about Managing Emerald Ash Borer During the Covid-19 Pandemic…[Read More]
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 as it breaks down over…Read more about Mounds upon Mounds of Mulch[Read More]
Plant pathology is the study of plant diseases. In my career, I’ve studied or witnessed the plant disease epidemics of chestnut blight, Dutch elm disease, sudden oak death, soybean rust, and many more. I am not comparing these to the current pandemic of Covid-19. It doesn’t compare. Please understand this is just an opportunity for…Read more about Epidemiology Plant pathology is the study of plant diseases[Read More]
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