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maple bud break

Early Season Predictions: Methods to Predict Weed Emergence

Fill in the blank: Apply crabgrass preemergence herbicide when____________is in bloom. If you said forsythia, you would be correct.  Most of us have been told the answer to this for many years, but have you ever thought to yourself, ‘Is it true?’ There are many ways that people make decisions[Read More…]

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thistle seed

What the Fluff?!

As summer comes to a close, plants are rapidly releasing seeds and the most noticeable are the flying fluffy type. Thistles, asters, and milkweed are just a few of the summer-flowering plants that depend on the wind to disperse their seeds, sometimes carrying them miles away to potentially suitable locations,[Read More…]

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herbicides

When Roundup Isn’t Roundup: Clearing up the confusion between products

In the last newsletter, an article on triclopyr (www.purduelandscapereport.org/article/the-summer-of-triclopyr-mounting-evidence-for-off-target-damage/) brought up much discussion on the Roundup brands now containing multiple active ingredients other than glyphosate. Professionals in the industry may encounter a client with herbicide damage symptoms that mimic growth-regulator injury instead of typical glyphosate damage symptoms. While the client[Read More…]

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common herbicide injury in evergreens

The Summer of Triclopyr: Mounting evidence for off-target damage

There have been a significant number of questions and problems regarding triclopyr that have come across my desk this growing season. Several of these problems have come through the Purdue Plant and Pest Diagnostic Laboratory (https://ag.purdue.edu/department/btny/ppdl/index.html) from landscapers, nurseries, and property managers. General Information about Triclopyr Triclopyr is a selective[Read More…]

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Purdue Turf and Landscape Field Day – After the Storm

On Tuesday, July 16, 2024 the Purdue Turf Program, the Purdue Green Industry Working Group and the Midwest Regional Turf Foundation successfully hosted the Purdue Turf and Landscape Field Day. The day didn’t start off as we had planned as our tent, capable of seating 500 people, was destroyed overnight[Read More…]

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Spotted Lanternfly is on the Move!

Spotted lanternfly is continuing to spread through Indiana.

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Registration Open for Diagnostic Lawn Training: August 1st, 2024

Join the Turf Specialists for Lawn Care Diagnostic Training on August 1, 2024. Click here to register “The Purdue Turfgrass Program created Diagnostic Training Events in 2011 to provide turf industry professionals the opportunity to learn in a hands-on, demonstration fashion. Participants will learn concepts through presentations in the classroom[Read More…]

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native prairie

So, the saying goes… Save the Stems, Leave the Leaves, and No Mow May

Gardeners are bombarded with sayings like save the stems, leave the leaves, and no mow May. These sayings are rooted in the same goal of protecting pollinators, but often leave gardeners with more questions. Let’s dig into each of the sayings. Save the stems: The first question that often arises[Read More…]

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Figure 1. Hydrangea chlorotic mottle virus. Photo by the Purdue Plant and Pest Diagnostic Lab.

Viruses of Hydrangea

Hydrangea L. (family Hydrangeaceae Dumort) is an all-encompassing description of a group of herbaceous and woody flowering plants, composed of more than 80 species native to Asia (including Japan), Indonesia, the Americas. Popular hydrangea species include the bigleaf hydrangea (Hydrangea macrophylla), also known as French hydrangea, panicled (peegee) hydrangea (H. paniculata), oak-leaf hydrangea (H. quercifolia)[Read More…]

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honeysuckle red berries and yellow leaves

Consider Fall Eradication of Asian Bush Honeysuckle

Asian bush honeysuckle (Lonicera spp.) is an extremely invasive plant that is a serious problem in most areas of the Midwest.  These invasive plants grow very fast, especially along woodland edges, and shade out most of the understory plants that are found in these areas.  Honeysuckle can also significantly reduce[Read More…]

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turf in fall

Fall Brings Football & A Lawn Policy Shift

Later this week, fall finally brings the respite of cooler temperatures and a much-needed drink of rainfall. While the cool-season species such as tall fescue and Kentucky bluegrass that dominate most of the Indiana lawnscape revel in this well deserved breather from disease pressure and high temperature stress, the metabolism[Read More…]

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Selecting plant material in the fall

The Perennial Garden: Fall Planting and Propagation

Planting may not be the first chore that comes to mind when considering the fall garden, but as Purdue Urban Forestry Specialist, Ben McCallister mentioned in the last issue, it’s an excellent time to install a new tree1. However, trees aren’t the only thing that can be added to the[Read More…]

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Tree showing early fall color.

Early Fall Color – A Symptom of Stress

Many trees are planted for their beautiful fall color, especially in locations where the climate provides reliable autumn weather. I have said this multiple times during extension talks and conversations with submitters to the PPDL, but I seem to have not experienced a ‘normal’ fall since moving to Indiana with[Read More…]

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Help IR4 Help You!

Help IR4 Help You!   The IR-4 Project provides the research necessary for pesticide registration on ornamental plants. IR4 operates as a unique partnership between the U.S. Department of Agriculture (USDA) – both the National Institute of Food and Agriculture (NIFA), the Cooperative State Research Education and Extension Service (CSREES),[Read More…]

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September seeding

Turn Around a Down Lawn with Seed

The final month of summer is here, meaning children are returning to school and pools will be closing soon. The end of summer also signifies shorter days, cooler temperatures and a nearing finish line for the long marathon run by our cool season lawns. Summer is tough on the fescues,[Read More…]

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poison hemlock

Recognizing and Managing Poison Hemlock

Poison hemlock was introduced to North America as a garden/ornamental plant. It is a native of Europe, and it is a member of the Apiaceae (parsley) family. Purdue experts Bill Johnson and Marcelo Zimmer wrote about poison hemlock in a Purdue Pest & Crop newsletter. They wrote that poison hemlock[Read More…]

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Columbine

Throwing Shade on the Perennial Garden

For some, the term “shade garden” may be an oxymoron. When imagining a garden, most will think of a sunny area filled with flowering plants. So, it’s not surprising that gardeners would often fill shady areas with a hardy, evergreen ground cover and never look back. However, ornamental shade gardens[Read More…]

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dark red peony

The Famed Garden Peony

Peonies are a common and favored landscape plant in Indiana. Despite their famed attribute of being easy to care for, some annual upkeep will ensure peonies continue to beautifully bloom year after year. Depending on the species and cultivar, peonies will bloom from late spring to early summer. Peonies were[Read More…]

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lawn mowing

Throw Some Shade with a Leaf Blower

Spring in all its wild weather swings, plant growth and flowering glory has arrived, and along with it, the chore of mowing the lawn. Many decry the labor and monotony, but evidently some do enjoy the practice, as a new video game allows one to mow a virtual yard even[Read More…]

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correct mulching

Re-mulch Your Trees

It’s that wonderful time of year again where temps are rising, life is coming back into the landscape, and people are thinking about how to improve the urban canopy around them.  Well, maybe not that specifically, but we have the urge to plant trees.  Whether it’s for Earth Day or[Read More…]

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