Got Nature? Blog

How does forest management affect wildlife, specifically birds? Which birds prefer which types of forest habitat? How can you help birds thrive on your property?

The Forestry for the Birds Virtual Tour is a new tool developed by Purdue Forestry and Natural Resources and Purdue Extension, which offers answers to those questions and more in an easily digestible and visual format. The virtual tour is based on The Nature Conservancy’s Forestry for the Birds program.

The virtual tour is an interactive guide to forest management techniques and birds in the forest that features 360-degree images, including several taken on eight Purdue FNR properties across the state. Bird identification resources from Cornell Lab of Ornithology’s Macaulay Library, forest management resources from Purdue Extension and more make the tour come to life and allow landowners to improve their identification and management skillsets.

The tour was created and is narrated by Kaitlyn Young, a 2022 wildlife alumna and current FNR master’s degree student. Young spent the summer of 2023 monitoring birds as an avian monitoring and extension intern for the Purdue FNR Extension Internship program.

Young conducted breeding bird surveys and made recordings of all the species she encountered whether audibly or visually last summer. She utilized a GoPro Max to capture 360-degree images of the properties she surveyed. Song Meter Mini acoustic monitors allowed her to capture various bird songs, which are incorporated into the background of some of the virtual scenes of the tour. Still camera images also provide stunning visuals of each property and bird type.

“I think my favorite thing about the tour is that when you are exploring each scene, it really feels like you are there,” Young explains. “I want folks who may not be able to visit our properties to feel like they are right there, inside the scene, while learning a thing or two about bird conservation and managing our forests for our rapidly declining feathery friends.”

Young is quick to note, however, that it is much easier to spot the birds she added to each scene of the tour than when trying to look for them during surveys, when they are often hiding behind the leaves in the canopy.

Forestry for the Birds is a project developed by the Indiana Chapter of The Nature Conservancy, which provides foresters and private landowners with the information and tools needed to enhance their forests in a way that fosters thriving bird communities. Many resources, including the Forestry for the Birds pocket guides, focus on the “Birders’ Dozen,” or 12 bird species which nest in the Central Hardwood ecoregion of Indiana that are easy to identify by sight and/or sound, and need conservation action to assist with range-wide or local population declines. The Birders’ Dozen species were selected by The Nature Conservancy and an independent group of birders, ornithologists and conservationists.

The virtual tour focuses on how different forest stewardship practices and forest types can benefit a variety of bird species, including the Birders’ Dozen. In each scene, there are three or more bird species to look for, recorded bird songs which are representative of what you could hear in that scene, interactive icons that link to images and videos and an audio description of the scene.

“I’m excited to see this virtual tour come to fruition – it provides some depth of information to complement the Forestry for the Birds Pocket Guide and Silvicultural Guide,” said Jessica Outcalt, Purdue Extension Educator, who helped develop the Forestry for the Birds materials for TNC. “I especially appreciate the visuals and audio that can’t be communicated via printed materials, and how this tour captures the sense of being in a forest that will make the material accessible to a wider audience.”

The properties shown illustrate a variety of forest stewardship techniques ranging from single tree selection to group tree selection, shelterwood, clearcut, oak woodland restoration and prescribed fire. The tour also highlights both young forests and mature closed-canopy forests.

The Birders’ Dozen includes:

• Yellow-billed and Black-billed Cuckoo
• Eastern Whip-poor-will
• American Woodcock
• Eastern Screech-Owl
• Red-headed Woodpecker
• Wood Thrush
• Eastern Towhee
• Yellow-Breasted Chat
• Baltimore Oriole
• Worm-eating Warbler
• Hooded Warbler
• Cerulean Warbler

*Bird species listed above with links will take you to the Indiana Woodland Steward website as they share highlights with this information in “The Birders’ Dozen Profile” written by Jessica Outcalt.

The American Woodcock, Wood Thrush and Cerulean Warbler are listed on the National Audubon Society watchlist, while the Cerulean warbler is state endangered in Indiana. The Eastern Whip-poor-will, American Woodcock, Worm-eating Warbler and Hooded Warbler have been noted as species of special concern by the Indiana Department of Natural Resources Division of Fish and Wildlife.

To view this article along with other news and stories posted on the Purdue Forestry and Natural Resources website view: Virtual Tour Brings Forest Management for the Birds to Life.

Resources: 
Breeding Birds and Forest Management: the Hardwood Ecosystem Experiment and the Central Hardwoods Region, The Education Store, Purdue Extension – Forestry and Natural Resources
Forest Birds, The Education Store
Managing Woodlands for Birds, The Education Store
Managing Woodlands for Birds Video, Purdue Extension-Forestry and Natural Resources (FNR) YouTube Channel
Breeding Birds and Forest Management: the Hardwood Ecosystem Experiment and the Central Hardwoods Region, The Education Store
The Birders’ Dozen, Profile: Baltimore Oriole, Indiana Woodland Steward
Ask An Expert, Playlist, Purdue Extension – FNR YouTube channel
It’s For the Birds, Indiana Yard and Garden-Purdue Consumer Horticulture
Birds and Residential Window Strikes: Tips for Prevention, The Education Store, Purdue Extension resource center
No Room at the Inn: Suburban Backyards and Migratory Birds, Education Store, Purdue Extension resource center
Putting a Little Wildlife in Your Backyard This Spring, The Education Store

Wendy Mayer, FNR Communications Coordinator
Purdue University Department of Forestry and Natural Resources

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In this webinar, hosted by Indiana Forestry & Woodland Owners Association, Joe Caudell, state deer biologist with Indiana DNR Division of Fish and Wildlife, shares recent efforts to better understand Indiana deer populations and how they vary across the landscape. The research from the Integrated Deer Management Project, a multi-year research project with Purdue Forestry and Natural Resources team working closely with the DNR biologists, created research management units (RMUs) so that they could be easily incorporated into deer management practices by the DNR.

Additional resources:

• Indiana Hunt for Hunger Program, Indiana Department of Natural Resources (IN DNR).
• If you’re interested in learning more about Indiana’s white tailed deer hunting and management, see the IN DNR page. There is a section on deer management with deer reports, survey results, and real time harvest data: White-Tailed Deer Hunting.
• Integrated Deer Management Project Website Introduced, Purdue College of Agriculture News.
• DNR Adopts RMU Research Techniques Created by Integrated Deer Management Project, Purdue College of Agriculture News.
• Deer Exclosures, Integrated Deer Management Project, Video, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel

Check out the Indiana Forestry & Woodland Association YouTube Channel for videos including: What is IFWOA?; A New Carbon Program for Hardwood Landowners Webinar, Indiana’s Native Orchids, Magnificent Trees of Indiana, Be Tick Aware and much more.

The Indiana Forestry & Woodland Owners Association (IFWOA) was founded in 1977 and is a non-profit organization dedicated to conservation and sustainable management of woodlands in Indiana. IFWOA advocates for scientific best practices for management to achieve objectives of clean water, wildlife habitat, soil protection, native species diversity, timber production, recreation, carbon sequestration and many others.

IFWOA is an affiliate of the National Woodland Owners Association. IFWOA is a partner, collaborator or is represented on leading National and State organizations. These memberships or collaborations are selected to advance Indiana Woodland owner’s interests. IFWOA monitors and influences legislation and economic trends impacting Indiana woodlands and landowners for our members. Membership in IFWOA provides a valuable network linkage to information and resources at the leading edge of science, industry and politics impacting Indiana woodlands.

More Resources:
Ask an Expert, Playlist, Purdue Extension – FNR YouTube Channel
Wildlife Habitat Hint: Trail Camera Tips and Tricks, Video, Purdue Extension – FNR YouTube channel
Wildlife Habitat Hint, Playlist
Trail camera survey for white-tailed deer, Got Nature? Blog
Handling Harvested Game: Episode 1, Field Dressing, Video
Woodland Stewardship for Landowners: Managing Deer Damage to Young Trees, Purdue Extension-FNR YouTube Channel
Managing Your Woods for White-Tailed Deer, The Education Store, Purdue Extension’s resource center
Introduction to White-tailed Deer Impacts on Indiana Woodlands, Got Nature? Blog & The Education Store

Liz Jackson, Engagement Lead
Indiana Forestry & Woodland Association

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In this edition of ID That Tree, Purdue Extension forester Lenny Farlee takes us through the different characteristics of coniferous trees found here in Indiana, particularly their foliage and the features that pertain to them. Come along as we look through real examples of shape, scales, leaf and branches of various local trees. The featured species include Eastern red cedarwood, Northern white cedar, and more.

 

If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.

Resources:
ID That Tree: Firs and Spruces, Video Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
ID That Tree – Jack Pine, Scotch Pine, Red Pine, Virginia Pine, Eastern White Pine, Video Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
Beat Back Borers Attacking Pines and Other Cone Bearing Trees, Purdue Landscape Report
Tree Diseases: White Pine Decline in Indiana, The Education Store, Purdue Extension Resource Center
Purdue Arboretum Explorer
Conservation Tree Planting: Steps to Success, Purdue Extension – FNR YouTube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR YouTube Channel
Woodland Stewardship for Landowners, Playlist, Purdue Extension – FNR YouTube Channel
Indiana Department of Natural Resources: Invasive Species
Indiana Invasive Species Council
Cooperative Invasive Species Management Area (CISMA)
Report Invasive, Purdue Extension
Episode 11 – Exploring the challenges of Invasive Species, Habitat University-Natural Resource University
Shrubs and Woody Vines of Indiana and the Midwest, The Education Store
Native Trees of the Midwest, The Education Store
Professional Forester, Indiana Forestry Woodland Owners Association
Forest Improvement Handbook, The Education Store
Find an Arborist, International Society of Arboriculture

Lenny Farlee, Extension Forester
Hardwood Tree Improvement and Regeneration Center
Purdue Department of Forestry & Natural Resources

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In this edition of ID That Tree, Purdue Extension forester Lenny Farlee goes over leaf characteristics to look for when attempting to identify broadleaved deciduous trees in Indiana. He shares the features of both single and compound leaves while outlining the differences between tree leaves. He takes you through a thorough guide on analyzing the leaflets, leaves, stems and buds, while increasing your knowledge of your surroundings.

 

If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.

Resources:
ID That Tree – Jack Pine, Scotch Pine, Red Pine, Virginia Pine, Eastern White Pine, Video Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
Beat Back Borers Attacking Pines and Other Cone Bearing Trees, Purdue Landscape Report
Tree Diseases: White Pine Decline in Indiana, The Education Store, Purdue Extension Resource Center
Purdue Arboretum Explorer
Conservation Tree Planting: Steps to Success, Purdue Extension – FNR YouTube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR YouTube Channel
Woodland Stewardship for Landowners, Playlist, Purdue Extension – FNR YouTube Channel
Indiana Department of Natural Resources: Invasive Species
Indiana Invasive Species Council
Cooperative Invasive Species Management Area (CISMA)
Report Invasive, Purdue Extension
Episode 11 – Exploring the challenges of Invasive Species, Habitat University-Natural Resource University
Shrubs and Woody Vines of Indiana and the Midwest, The Education Store
Native Trees of the Midwest, The Education Store
Professional Forester, Indiana Forestry Woodland Owners Association
Forest Improvement Handbook, The Education Store

Lenny Farlee, Extension Forester
Hardwood Tree Improvement and Regeneration Center
Purdue Department of Forestry & Natural Resources

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MyDNR, Indiana’s Outdoor Newsletter: Every May, wild turkey chicks (poults) begin to hatch in Indiana, and DNR needs your help counting turkey broods (hens with poults) and hens without poults.

Brood reports have been collected every year since 1993 to calculate the annual Wild Turkey Production index, which informs biologists about population status and guides management decisions for the species. Please share your 2024 observations with us online from July 1 until Aug. 31. Recording observations takes less than five minutes, and no login is required.

In 2023, DNR received more than 2,203 reports across all 92 counties in Indiana, and we’re hoping for even more this year. Our goal is to receive 3,000 total observations with at least 25 per county.

Why count turkeys?
Brood surveys provide useful estimates about annual production by wild turkey hens and the survival of poults (young turkeys) through the summer brood-rearing period. Summer brood survival is generally the primary factor influencing wild turkey population trends. Information on summer brood survival is essential for sound turkey management. Information gathered through the brood survey includes:

• Average brood sizes (hens + poults). For example, in the photo above there is one hen with seven poults, for a brood size of eight.
• Percentage of adult hens with poults.
• Production Index (PI) = total number of poults/total number of adult hens

What is a wild turkey brood?
A wild turkey brood is composed of at least one adult hen with young (poults). As the summer progresses, multiple broods may gather into what is termed a “gang” brood with several adult hens and multiple broods of poults of varied ages. During summer, adult gobblers (male turkeys) play no role in raising a brood and either form small male only “bachelor” flocks or are observed as a single gobbler.

The Indiana Department of Natural Resources – Department of Fish and Wildlife rely on your observations to calculate their Production Index, so every report counts! Indiana DNR appreciates your participation.

Jarred Brooke, extension wildlife specialist with Purdue Forestry & Natural Resources, shares how you can participate in the Indiana Department of Natural Resources’ annual turkey brood survey in a quick video.

 

To learn more, visit DNR: Turkey Brood Reporting.

To subscribe to the newsletter visit MyDNR Email Newsletter.

Resources:
Four Simple Steps, Help Indiana DNR Estimate Wild Turkey Populations, Purdue Extension – Forestry & Natural Resources
Truths and Myths about Wild Turkey, The Education Store, Purdue Extension resource center
Wildlife, Playlist, Purdue Extension – Forestry and Natural Resources YouTube Channel
Forest Improvement Handbook, The Education Store
Turkey Brood Reporting, Indiana Department of Natural Resources (IDNR)
Wild Turkey, Indiana Department of Natural Resources (IDNR)
Wild Turkey Hunting Biology and Management, Indian Department of Natural Resources (IDNR)
Subscribe to Purdue Extension-Forestry & Natural Resources YouTube Channel, Wildlife Playlist

Indiana Department of Natural Resources

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Purdue Landscape Report: 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 trees. Let’s look at what I found (or didn’t find) and discuss when and if these issues should be treated.

Apple Scab on Maples?
First, we can eliminate the concern about apple scab because maple and oak trees are not hosts for this pathogen. Apple scab is caused by the fungus Venturia inaequalis, and hosts include apples, crabapples, hawthorn, mountain ash, firethorn, and loquat. There are other fungal diseases which cause leaf spotting in maples, such as Anthracnose, tar spot, and Phyllosticta leaf spot. To diagnosis these diseases, homeowners can submit a sample to the Purdue Plant & Pest Diagnostic Lab, or hire a certified arborist to assess the tree. However, all these diseases are primarily aesthetic issues. A healthy tree will not die from these pathogens and does not require treatment. You can find more information about maple diseases in this publication: Diseases in Hardwood Tree Plantings. You can also find a previous article on Tar Spot in Maple in the Purdue Landscape Report (Issue 18-12).

Spider Mites
The next pest concern on these trees is spider mites. Out of the dozens of leaves I collected, I found only two immature mites on a couple of maple leaves I examined. This is a very small mite presence, and it is not recommended to treat for spider mites unless the populations threaten the health or appearance of the tree. Limiting pesticide usage will conserve the natural enemies, which are vital to keeping mite populations in check. In fact, improper pesticide applications can kill these important natural enemies and worsen mite infestations.

When do you know if the mite population is large enough to merit intervention? Check your trees for signs of heavy feeding damage, such as leaf stippling (Fig. 1), or dense webbing on the leaves. Mites can also be monitored by placing a sheet of paper (8.5×11”) beneath a branch and striking the limb. Chemical treatments should be considered when you count ≥24 mites per strike. You can find detailed management recommendations and a full list of pesticide options in this Purdue Extension publication: Spider Mites on Ornamentals.

Aphids
The aphids I found on the homeowner’s maple trees are Drepanaphis acerifoliae, or the painted maple aphid (Fig. 2). This species only feeds on maple trees, and is not a threat to the oak tree on this homeowner’s property. Painted maple aphid is a very common aphid in our region. I found only a few aphids on one of the maple trees I sampled, which is not enough to require treatment. In addition, one of the aphids was a “mummy”, or a carcass left behind from a parasitoid wasp. This indicates that natural enemies are already at work managing the aphid population. Aphids may rarely require chemical control if their numbers grow large enough to produce significant amounts of honeydew, which can result in sooty mold outbreaks.

Tussock Moth
The only insect I found on the oak tree was a white-marked tussock moth caterpillar, Orgyia leucostigma (Fig. 3). This is the likely culprit for the minor feeding damage I noticed. These are not significant pests and do not require treatment. Don’t touch them, though! The setae of this caterpillar are irritating and may cause allergic reactions.

Overall, the pests I found were minimal and non-threatening to the trees. It’s normal to find some insect pressure in the landscape. Knowing when and if to treat requires accurate diagnosis and monitoring of pest levels. Check out PurduePlantDoctor.com for an easy-to-use diagnostic aid and treatment recommendations.

Original article posted: Purdue Landscape Report.

Subscribe and receive the newsletter: Purdue Landscape Report Newsletter.

Resources:
Large Spots on Maple Leaves that Look Like Tar, Purdue Extension News
Find an Arborist, International Society of Arboriculture
Diseases in Hardwood Tree Plantings, The Education Store, Purdue Extension’s resource center
Fifty Common Trees of Indiana
An Introduction to Trees of Indiana, The Education Store
Shrubs and Woody Vines of Indiana and the Midwest, The Education Store
Tree Installation: Process and Practices, The Education Store
Forest Improvement Handbook, The Education Store
Invasive Species, Playlist, Purdue Extension – FNR YouTube Channel
Report Invasive Species, Purdue Invasive Species
What are invasive species and why should I care?, Got Nature? Blog, Purdue Extension – Forestry and Natural Resources
Indiana Department of Natural Resources: Invasive Species
Indiana Invasive Species Council
ID That Tree, Purdue Extension-FNR YouTube playlist
Tree Defect Identification, The Education Store
Tree Wound and Healing, Got Nature? Blog, Purdue Extension – Forestry and Natural Resources

Alicia Kelley, Cooperative Agricultural Pest Survey (CAPS) Coordinator
Purdue Extension – Entomology

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In this episode of A Woodland Management Moment, Purdue Extension forester Lenny Farlee talks about the importance of oak regeneration. Oak is a ‘keystone’ species, integral to supporting many different facets of wildlife. This includes insects to large mammals all across the environment in Indiana and the central hardwood region. This video also shares details regarding Purdue’s initiatives to ensure the diverse ecosystems maintained by oak and to provide the resources needed to keep regenerating this integral tree

If you have any questions regarding trees, forests, wildlife, wood products or other natural resource topics, feel free to contact us by using our Ask an Expert web page.

Resources:
A Woodland Management Moment, Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
Learn How to Support Oak-Hickory Ecosystems, Purdue Extension – FNR Got Nature? Blog
The Nature of Oaks Webinar, Purdue Extension-FNR YouTube Channel, Shared from Indiana Forestry & Woodland Owners Association
Oak Leaf Tatters, Purdue Landscape Report
Inonotus Dryadeus, Butt and Root Rot of Oaks, Purdue Extension – FNR Got Nature? Blog
Predicting the Height Growth of Oak Species Reproduction Over a 23-year Period Following Clearcutting, Hardwood Tree Improvement & Regeneration Center (HTIRC)
Conservation Tree Planting: Steps to Success, Purdue Extension – FNR YouTube Channel
Shrubs and Woody Vines of Indiana and the Midwest, The Education Store, Purdue Extension Resource Center
Native Trees of the Midwest, The Education Store
ID That Tree, Playlist, Purdue Extension – FNR YouTube Channel
Investing in Indiana Woodlands, The Education Store
Woodland Stewardship for Landowners Video Series, Playlist, Indiana Department of Natural Resources YouTube Channel
Ask an Expert: Tree Selection and Planting, Purdue Extension – FNR YouTube Channel
Forest Improvement Handbook, The Education Store
Find an Indiana Professional Forester, Indiana Forestry & Woodland Owners Association (IFWOA)
Purdue Arboretum Explorer

Lenny Farlee, Extension Forester
Hardwood Tree Improvement and Regeneration Center
Purdue Department of Forestry & Natural Resources

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The long lifespan of many trees, which could be centuries or even millennia in the case of a few species, is a source of awe and inspiration for many. The bark of trees can often tell some stories about their life and history, if we know how to interpret what we see. Here are a few examples you may run across in Indiana.

 

Resources:
Hardwoods of the Central Midwest, Purdue Arboretum Explorer
Forest Improvement Handbook, The Education Store, Purdue Extension’s resource center
ID That Tree, Purdue Extension-Forestry & Natural Resources (FNR) YouTube playlist
Native Trees of the Midwest, The Education Store
Woodland Management Moment , Purdue Extension-FNR YouTube playlist
Tree Installation: Process and Practices, The Education Store, Purdue Extension’s resource center
Planting Your Tree Part 1: Choosing Your Tree, video, The Education Store
Tree Risk Management – The Education Store
Find an Arborist website, Trees are Good, International Society of Arboriculture (ISA)
Subscribe Purdue Extension-Forestry and Natural Resources YouTube Channel

Lenny Farlee, Extension Forester
Hardwood Tree Improvement and Regeneration Center
Purdue Department of Forestry & Natural Resources

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Familiar with surprise lilies? Indiana has a native surprise onion!

Many yards where I grew up in southern Indiana were graced with surprise lilies. These plants grew long narrow leaves in the spring, which faded and died by early summer. After a pause with no evidence of the plant, long stems with pink lily-like flowers emerged, with no leaves to be seen.

While these plants are not a native species, we do have a native with similar habits that is a distant relative of the surprise lily. That plant is ramps, also known as wild leek and a variety of other local names. There are two species of ramps recognized now – the more common broad-leaved ramps, Allium tricoccum, and the narrow-leaved ramps, Allium burdickii. Ramps are related to onions and garlic and have odor and taste reminiscent of those plants. Ramps foliage emerges early in the spring and was one of the earliest green edibles available to First Nations people and early European settlers.

Many communities developed festivals or celebrations centered on the emergence of ramps as a sign of spring and some fresh greens to eat. The bright green leaves emerge before the tree leaves and fade before summer, but by the first half of June expect to see thin stems with a rounded cluster of small white flowers emerge – our surprise onion! It may take a ramps plant seven to ten years from seed to produce a flower, so this is a slow-growing and long-lived forest perennial. The flowers are pollinated by insects and produce round black seeds that may stay on the stalk through winter.

Look for ramps in well-shaded forest areas with moist soils. They have a scattered distribution across Indiana, so you won’t find them in every woodland. The leaves and bulbs are edible, but absolute certainty of ID is essential as there are some toxic plants that look similar.  Check ID references and spend some time with experienced foragers before eating any wild plants. The onion/garlic odor of ramps is a good indicator for positive ID.

Since this is a slow growing plant with a limited distribution, over-collection is a threat. A responsible harvesting technique is to harvest one leaf from mature plants, leaving the other leaves and the bulb. If you harvest the whole plant, take less than 5 percent of the plants in a patch, allowing seeding and bulb division to repopulate the area. Seed or bulbs can also be used to plant new patches. So keep you eyes open for our local surprise flowers this June – ramps!

 

Resources:
ID That Tree, Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR YouTube Channel (Against Invasives, Garlic Mustard, Autumn Olive)
Woodland Stewardship for Landowners, Playlist, Purdue Extension – FNR YouTube Channel (Common Buckthorn, Japanese Barberry)
Indiana Department of Natural Resources: Invasive Species
Indiana Invasive Species Council
Cooperative Invasive Species Management Area (CISMA)
Episode 11 – Exploring the challenges of Invasive Species, Habitat University-Natural Resource University
What are invasive species and why should I care?, Got Nature? Blog, Purdue Extension – FNR
Shrubs and Woody Vines of Indiana and the Midwest, The Education Store, Purdue Extension Resource Center
Planting Your Tree Part 1: Choosing Your Tree, video, The Education Store
Find an Arborist website, Trees are Good, International Society of Arboriculture (ISA

Lenny Farlee, Extension Forester
Hardwood Tree Improvement and Regeneration Center
Purdue Department of Forestry & Natural Resources

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Purdue Landscape Report: The past two months have been relatively wet and cool to warm. This prolonged period of overcast conditions, high humidity, and light to moderate rainfall is perfect for some of our foliar disease issues.

“April flowers bring May Leaf spots” doesn’t have the right ring to it, but we are seeing quite a bit of leaf curl and leaf blister. These are two disease issues caused by Taphrina spp. fungi. Like the common names of their diseases, the symptoms caused by a Taphrina infection include leaf deformation.

In the case of Peach, the leaves turn light yellow, bright pink, or red where tissue puckers and twists leading to curled leaves. In oak, leaves develop localized blisters that are light green early in the season and are easy to miss since the color is not very different from healthy tissue.

However, the blisters will turn brown later in the season which makes them more noticeable. Maples also get a disease caused by Taphrina, but it does not cause as much distortion as it does on oak or peach. Severe maple leaf blister can lead to leaves becoming slightly contorted, but the primary symptom is brown necrotic lesions.

With cool wet weather over an extended period of time, we have been seeing more foliar disease issues than in the last few years.

Since disease problems can take time to develop, Taphrina is likely just the harbinger for some other disease issues we may see in early summer if moderate conditions continue. If the weather dries out as it heats up, it will halt many of these foliar problems in their tracks.

Original article posted: Purdue Landscape Report

Subscribe and receive the newsletter: Purdue Landscape Report Newsletter.

Resources:
Learn How to Support Oak-Hickory Ecosystems, Purdue Extension – Forestry and Natural Resources (FNR) Got Nature? Post
“The Nature of Oaks” Webinar, Indiana forestry & Woodland Owners Association
How to Find an Arborist Near You!, Purdue Extension – FNR Got Nature? Post
Diplodia Tip Blight of Two-Needle Pines, The Education Store, Purdue Extension resource center
Boxwood Blight, The Education Store
Disease of Landscape Plants: Cedar Apple and Related Rusts on Landscape Plants, The Education Store
Planting Your Tree Part 1: Choosing Your Tree, Purdue Extension YouTube Channel
Indiana Department of Natural Resources: Invasive Species
Indiana Invasive Species Council
Cooperative Invasive Species Management Area (CISMA)
Report Invasive, Purdue Extension
Aquatic Invasive Species, Illinois-Indiana Sea Grant (IISG)
Episode 11 – Exploring the challenges of Invasive Species, Habitat University-Natural Resource University
What are invasive species and why should I care?, Got Nature? Blog, Purdue Extension – FNR
Shrubs and Woody Vines of Indiana and the Midwest, The Education Store, Purdue Extension Resource Center
Native Trees of the Midwest, The Education Store

John Bonkowski, Lead Extension Administrator
Purdue Department of Botany and Plant Pathology

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