Purdue University - Extension - Forestry and Natural Resources
Got Nature? Blog
Purdue Landscape Report: These oak trees are showing the symptoms of smooth patch ( see below Figures 1, 2, 3). This condition is the result of a fungal infection that is restricted to the outer bark, causing it to slough off. The bark layer remaining is smoother and lighter in color than uninfected, normal bark.
Patches can vary from a few inches to a foot or more in diameter and may occur on branches as well as the trunk. Several fungi can cause this condition. A common species, Aleurodiscus oakesii, produces clusters of flat, disc-like spore-bearing structures on the surface of the smooth bark. These structures are gray or beige in color and are usually less than 1⁄2 inch in diameter (Figure 4).
The best time to see this interesting phenomenon in the forest is during wet periods in late winter before new spring growth begins, when the light gray bark stands out in the light penetrating the canopy. The fungal structures shrink when dry so will be more apparent following rainy weather.
The fungal structures may be mistaken for wood decay fungi, but because smooth patch fungi invade only the nonliving, outer bark tissues, they do not affect the health of the tree. No control measures are needed.
The fungal structures may be mistaken for wood decay fungi, but because smooth patch fungi invade only the nonliving, outer bark tissues, they do not affect the health of the tree. No control measures are needed.
Resources:
Indiana Forestry & Woodland Owners Association (IFWOA) YouTube Channel
District Forester, Indiana DNR Division of Forestry, for over 10 acres of woodlands
Directory of Professional Foresters, Indiana Forestry & Woodland Owners Association (IFWOA)
Indiana Woodland Steward E-newsletters, Eleven Member Organization
The Nature of Oaks Webinar, Purdue Extension-FNR YouTube Channel, Shared from Indiana Forestry & Woodland Owners Association
Purdue Arboretum Explorer
Native Trees of the Midwest, Purdue University Press
A Woodland Management Moment, Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
Conservation Tree Planting: Steps to Success, Purdue Extension – FNR YouTube Channel
Forest Improvement Handbook, The Education Store
Woodland Stewardship for Landowners, Playlist, Purdue Extension – FNR YouTube Channel
ID That Tree – Video Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
Invasive Species, Playlist, Purdue Extension – FNR YouTube Channel
Invasive Plant Species Identification, Video, Purdue Extension – FNR YouTube Channel
Report Invasive Species, Purdue Invasive Species
Subscribe – Purdue Extension-FNR YouTube Channel
Tom Creswell, Plant & Pest Diagnostic Laboratory Director
Purdue Botany and Plant Pathology
Welcome to ID That Tree! In this video, Purdue forester Lenny Farlee examines one of Indiana’s most troublesome invasive shrubs: Amur honeysuckle. This aggressive species, along with other Asian honeysuckle varieties, is widespread across the state. It’s easily identified by its long, pointed leaves, smooth edges, and fine fuzz. Watch the video to learn more about its distinguishing features and the impact on Indiana’s ecosystems!
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 – Video Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
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
Fifty Common Trees of Indiana, Purdue Extension – FNR
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
Welcome to this edition of “ID That Tree”. In this video Purdue Extension forester Lenny Farlee will introduce you to leatherwood, a charming Indiana shrub. Typically found in the understory of forest areas, this compact shrub is easy to identify by its oblong leaves with smooth margins and alternate leaf arrangement. Join us to learn more about leatherwood and its unique characteristics!
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 – Video Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
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
Fifty Common Trees of Indiana, Purdue Extension – FNR
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
In this edition of ID That Tree, Purdue Extension Forester Lenny Farlee showcases the unique features of prickly ash. The northeast member of the Citrus family (not the Ash family!) is a shrub with stout, paired thorns, reddish-brown buds and also has other traits shared in the video that makes it easy to spot out in the wild. This video contains nice close-up shots so you can identify this plant, which is native to Indiana and an important part of the habitat.
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
Join Purdue Extension forester Lenny Farlee and wildlife specialist Brian MacGowan as they help you prepare for the holidays while keeping your family and local wildlife safe. This video discusses everything from how to choose and care for a real Christmas tree as well as what to do with it after the season and also how to make wildlife/nature-friendly decorations.
Topics Include:
– What can I do with my tree after Christmas that would benefit wildlife?
– Are artificial structures legal in Indiana lakes?
– What types of items can I collect from the wild for holiday decorations?
– How do I do it in an environmentally responsible way?
– Are there some things I shouldn’t or can’t collect?
– What outdoor holiday decorations can benefit wildlife?
– How do I make it last longer?
– Can I avoid problems with non-target wildlife?
If you have any questions regarding trees, forest management, wildlife, wood products or other natural resource topics, feel free to contact us by using our Ask an Expert web page.
Resources
Selecting an Indiana-Grown Christmas Tree, The Education Store, Purdue Extension resource center
Tips for First-Time Buyers of Real Christmas Trees, The Education Store
Indiana Christmas Tree Growers Association
Purdue University Invasive Species resources
Indiana DNR Division of Fish and Wildlife for wildlife possession rules
Feed the birds with a DIY wreath, Audubon
Dan Cassens: Tips for First-Time Christmas Tree Buyers, Video, Purdue Agriculture
Dan Cassens: Starting Your Own Christmas Tree Farm, Video
Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resource
Brian MacGowan, Extension Wildlife Specialist
Department of Forestry & Natural Resources, Purdue University
Figure 1: This crabapple tree was attacked first by fire blight and later by Botryosphaeria canker, killing the main trunk.
Purdue Landscape Report: Dieback and canker diseases caused by Botryosphaeria, Sphaeropsis, Diplodia and other closely related fungal pathogens are exceptionally common on woody landscape plants. This group of diseases are often referred to collectively as Botryosphaeria diseases and this article will follow that convention to discuss them as a group. Examine any mature oak tree long enough and you’re likely to find at least some stems dying due to Botryosphaeria. Check the base of dying stems of cranberry bush viburnum and you’re likely to find a Botryosphaeria canker. Look closely at sunken cracked stems and dieback on redbud and, you guessed it, more Botryosphaeria.
Botryosphaeria is opportunistic and is often seen killing individual branches that have been wounded or attacked by other diseases, providing an entry point for the fungus. (Fig 1) Stress factors like drought, freezing or defoliation due to disease or insect attack increases susceptibility to infection, and reduces plant defenses so that existing infections often move faster down the stem. However, wounds are not required for infection. In susceptible trees and shrubs, the fungus may attack the smallest twigs and later spread to larger branches where they cause cankers.
Symptoms:
Discoloration and death of leaves on individual stems may point to Botryosphaeria canker at the base of the dying stem (Fig 2). As the canker girdles a stem, the portion of the stem above the canker gradually dies. Smaller twigs with immature bark may become discolored as the pathogen spreads. Symptoms may vary depending on the plant species infected. In many cases the infection fails to completely encircle the stem, resulting in stems with half necrotic and half living stem tissue (Fig 3).
Figure 2: A viburnum hedge with dieback caused by Botryosphaeria. Leaf color may progress from yellow to red to brown as branches die.
Figure 3: A rhododendron stem showing one-sided necrosis caused by Botryosphaeria infection. The tan to brown discoloration in the wood is typical of Botryosphaeria on many deciduous trees and shrubs.
Figure 4: This Viburnum x burkwoodii stem has a large Botryosphaeria canker at the base, killing the branch above that point. After the branch was pruned out the remainder of the shrub survived.
Botryosphaeria cankers usually cause bark to be cracked, sunken and discolored (Fig 4). Fruiting bodies of the fungus appear as pinhead-sized black specks embedded in the bark, which may be raised in small bumps covering the cankers.
Management:
Prevention of infection depends mainly upon avoiding unnecessary wounding and minimizing environmental stresses that induce susceptibility. Avoid allowing trees and shrubs, especially those recently transplanted, to become drought stressed. Keep plants in good condition and in moderate growth. Avoid high fertilizer rates that induce rapid, succulent growth that may be more susceptible to infection.
Prune out and destroy any dead branches at least six inches below discoloration in the bark or sapwood. Be sure to clean pruning tools with a disinfectant after working on infected plants.
Fungicides have not been effective at preventing infections, and once the fungus is inside the wood fungicides can’t touch it, so they are generally not recommended in the landscape.
Avoid using highly susceptible plants, such as Viburnum trilobum or Salix spp., in drought prone sites.
Resources:
Botryosphaeria Canker, Purdue Plant Doctor
Beat Back Borers Attacking Pines, Purdue Landscape Report
Black Spot of Elm, Purdue Landscape Report
Inonotus Dryadeus – Butt and Root Rot of Oaks, Purdue Landscape Report
Stories in the Bark – Patterns and Growth, Purdue Extension – Forestry & Natural Resources Got Nature? Blog
Root Rot in Landscape Plants, The Education Store, Purdue Extension resource center
Dead Man’s Fingers, Purdue Landscape Report
ID That Tree Fall Color: Sugar Maple, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
ID That Tree Fall Color Edition: Black Gum, Purdue Extension – FNR YouTube Channel
An Introduction to Trees of Indiana, The Education Store
Tree Defect Identification, The Education Store
Tree Wound and Healing, Got Nature? Blog, Purdue Extension – FNR
Shrubs and Woody Vines of Indiana and the Midwest, The Education Store
Ask an Expert: Tree Selection and Planting, Purdue Extension – FNR YouTube playlist
ID That Tree, Purdue Extension – FNR YouTube playlist
Invasive Species, Playlist, Purdue Extension – FNR YouTube Channel
Report Invasive Species, Purdue Invasive Species
Find an Arborist, International Society of Arboriculture
Subscribe, Purdue Extension – FNR YouTube Channel
Tom Creswell, Plant & Pest Diagnostic Laboratory Director
Purdue Botany and Plant Pathology
Wild Bulletin, Indiana Department of Natural Resources (DNR) Fish and Wildlife: Instead of raking and bagging leaves this fall, consider allowing them to stay and naturally decay. Fallen leaves, plant stems, flower heads, twigs, and logs provide crucial winter habitat for Indiana’s wildlife.
The warmth and cover of leaves provide shelter for Eastern box turtles, salamanders and frogs, as well as insulation for butterflies and moths. Leaf piles can even benefit landscaping, as they can suppress weeds, retain moisture, and add nutrients to the soil as they decay. Leaves don’t have to be left exactly where they fall—you can rake them into flower beds and around tree bases.
For more information about creating habitat for wildlife in your backyard, visit the DNR website and the Wildlife Habitat Fact Sheet.
Resources:
Frost Seeding to Establish Wildlife Food Plots and Native Grass and Forb Plantings – The Education Store, Purdue Extension’s resource center
Wildlife Habitat Hint: Tips for Evaluating a First Year Native Grass and Forb Plantings, Purdue Extension – FNR YouTube Channel
Drone Seeding Native Grasses and Forbs: Project Overview & Drone Setup, Purdue Extension – FNR YouTube channel
Forest Improvement Handbook, The Education Store
Ordering Seedlings from the State Forest Nursery System, Got Nature? – Purdue Extension-Forestry & Natural Resources (FNR)
Designing Hardwood Tree Plantings for Wildlife – The Education Store
ID That Tree – YouTube Playlist
Forest Management for Reptiles and Amphibians: A Technical Guide for the Midwest, The Education Store
Ask the Expert: Hardwood Ecosystem Experiment – Birds and Salamander Research, Purdue Extension – FNR
A Template for Your Wildlife Habitat Management Plan, The Education Store
Managing Your Woods for White-Tailed Deer, The Education Store
Woodland Stewardship for Landowners, Playlist, Purdue Extension – FNR YouTube channel
Nature of Teaching Unit 1: Animal Diversity and Tracking, The Education Store
Subscribe Purdue Extension – Forestry and Natural Resources YouTube Channel, Playlists include wildlife, Nature of Teaching, Moments in the Wild and much more.
Indiana Department of Natural Resources – Division of Fish & Wildlife
In this edition of ID That Tree, Purdue Extension forester Lenny Farlee takes us through the different characteristics of Hoptree, a relatively common shrub here in Indiana. This is a unique native plant with three-part leaves and hop-like seed pods. Also called Wafer Ash due to its distinctive wafer-shaped seeds, this shrub can often be confused with Poison Ivy or Bladdernut, so be sure to pay attention to key differences in the video. Features include trifoliate leaves and the temperate areas in which it grows.
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
Purdue Agriculture News: As autumn settles in, we eagerly await the transformation of leaves into vibrant hues of red, orange and yellow. However, this year might tell a different story due to prolonged periods of hot weather. Ben McCallister, urban forestry specialist in Purdue University’s Department of Forestry and Natural Resources, sheds light on what to expect this fall.
The Impact of Weather on Fall Foliage Timing
“Right now, we’re seeing a mix of fall coming in and shifting temperatures, which is causing trees to respond. This back-and-forth hot weather is creating some color changes related to drought and stress. This can be expressed as brown color where leaves are starting to wilt and look a little crunchy from exposure to heat and drought stress,” McCallister explains.
While the typical color change occurs from mid-September to early November, it’s not unusual for leaves to remain green at this point in the season. McCallister suggests that while the hot weather “most likely won’t affect anything visually, it could influence fall foliage over time as climate change progresses.”
He anticipates a more pronounced display of fall colors extending through October, with some species showing their colors into November. Ultimately, the vibrancy and timing of these changes will depend on daily temperature fluctuations and the amount of sunlight trees receive.
The environment also plays a significant role in how trees respond. For instance, urban areas with more concrete and buildings create a “urban heat island” effect, which can delay color changes compared to more rural settings.
The science of fall foliage is both fascinating and complex. McCallister explains that different tree species respond to autumn at varying times, with chlorophyll being a key player in this process.
“Changes in chlorophyll production leads to the color changes in leaves. Chlorophyll allows leaves to take up sunlight and convert it into energy, creating carbohydrates in the form of sugars – really anything that gives energy to the tree to help it grow, sustain itself and compartmentalize,” McCallister notes.
As temperatures cool and the sunlight diminishes, chlorophyll production declines, allowing the green hues of leaves to fade. This decline reveals carotenoids and anthocyanins – two chemicals essential to fall foliage. Carotenoids contribute to the yellow and orange shades, while anthocyanins produce reds and purples. As chlorophyll wanes, these vibrant colors emerge.
“It’s a very cool process,” McCallister adds. “Each color absorbs different spectrums of light, altering energy uptake and preparing trees for leaf drop and dormancy. As leaves in deciduous trees transition, trees store energy in their roots and wood so they can brave the winter.”
When it comes to enjoying fall foliage, McCallister emphasizes that Indiana offers many great viewing locations not far from Purdue’s campus.
Locally, Martell Forest, which is open to the public, is a great spot to check out the fall foliage and immerse yourself in the woods,” says McCallister.
Leaf drop is likely to occur anytime from mid-October into December, although this process may take longer than usual due to the milder winters we’ve been experiencing. Similar to color changing, the timing of leaf drop varies by tree species and their growth patterns, as well as the overall weather conditions.
“For instance, ginkgo trees turn this brilliant yellow and have a cool reaction to leaf drop. Typically, all their leaves fall within a day or so, creating a carpet of yellow. In contrast, trees like maples and oaks, which have a mix of yellow, orange and red leaves, tend to hold onto their foliage a bit longer,” McCallister recalls.
It’s also important to note that while coniferous trees, like pines, spruces and furs, retain their needles year-round, some conifers like bald-cypress trees drop theirs. This sometimes causes confusion for homeowners who mistake these deciduous conifers for dying trees.
To provide the best care for your trees during these changing weather patterns, McCallister advises familiarizing yourself with different tree species. Resources like Google and dichotomous keys in forestry books can help with species identification and lead to tips for care. Regularly checking your trees’ health is essential year-round. Specialists in your local county Extension offices and ISA Certified Arborists can be valuable resources for proper tree management.
To view the original article along with other news and stories posted on the Purdue Agriculture website see: Is fall foliage a sign of seasonal change or response to heat waves?
Resources:
Find an Arborist video, Trees are Good-International Society of Arboriculture (ISA)
ID That Tree, Playlist, Purdue Extension – FNR YouTube Channel
Invasive Species Playlist, Playlist, Purdue Extension – FNR YouTube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR YouTube Channel (Against Invasives, Garlic Mustard, Autumn Olive)
Report Invasive Species, Purdue Invasive Species
Invasive Plants of the Eastern U.S.: An Introduction to the Problematic Non-Native Species, The Education Store, Purdue Extension’s resource center
Why Fall Color is Sometimes a Dud, Purdue Landscape Report
\U.S. Forest Service Fall Colors, Forest Service, U.S. Department of Agriculture
ID That Tree Fall Color: Sugar Maple, Purdue Extension – Forestry and Natural Resources YouTube Channel, ID That Tree Playlist
What Are Invasive Species and Why Should I Care?, Purdue Extension-FNR Got Nature? Blog
Emerald Ash Borer Information Network, Purdue University and Partners
Invasive plants: impact on environment and people, The Education Store, Purdue Extension’s resource center
Subscribe Purdue Extension-Forestry and Natural Resources YouTube Channel
Devyn Raver, Media Relations and Content Development Specialist
Purdue Forestry & Natural Resources
Ben McCallister, Urban Forestry Specialist
Purdue Forestry & Natural Resources
Question: We have a large 60+ foot mulberry tree in our backyard that is located by our pond. This is the first year I have seen these dark streaks on the bark of the tree. Should I have concerns?
Answer: From the photos, it looks like wet wood/slime flux is affecting your tree. It is a bacterial infection on trees and in most cases is not a serious issue, but unfortunately, there is nothing to be done about it. Many years ago they used to drill holes to try and allow gases and liquids drain from an area with the slime flux but through research and experience this practice is not recommended.
The Purdue Landscape Report titled Slime Flux of Trees shares more about this disease:
Slime flux (also known as wet wood) is a dark, foul-smelling and unsightly seepage of sap from tree trunks. The disease is not usually a serious problem but the appearance can be alarming. Slime flux is caused by common surface-inhabiting bacteria or yeast fungi that enter the trunk through wounds associated with improper pruning, stem breakage, injections, cracks from freeze injury or weak limb crotches. The bacteria and yeast may live on sap nutrients within injured trees for many years without any outward evidence.
Symptoms
The main symptom is the appearance of the dark sap oozing on the trunk exterior which happens when gasses produced by growth of the bacteria and yeast cause the internal pressure of the sap to become high enough to force the sap out through cracks in the bark. The dark streaks usually turn light gray or white upon drying. Oozing sap may be frothy and white at the point of exit. Airborne bacteria, yeasts, and fungi often colonize the wet oozing material, which ferments and releases a foul odor. Slime flux may delay wound healing (callus formation).
For prevention and other resources view: Slime Flux of Trees.
Resources
Purdue Landscape Report
Find an Arborist video, Trees are Good-International Society of Arboriculture (ISA)
Tree Pruning Essentials, Publication & Video, The Education Store, Purdue Extension resource center
Tree Pruning: What Do Trees Think?, The Education Store
Tree Installation Process and Practices, The Education Store
Tree Pruning for the Landscape, Webinar, Purdue Extension – Forestry and Natural Resources YouTube channel
Tree Wounds and Healing
Why Is My Tree Dying? – Got Nature? Blog, Purdue Extension – Forestry and Natural Resources
Tree Risk Management – Got Nature? Blog, Purdue Extension – FNR
What Are Invasive Species and Why Should I Care?, Got Nature? Blog Post, Purdue Extension – FNR
Purdue Plant & Pest Diagnostic Lab (PPDL)
Subscribe – Purdue Extension-FNR YouTube Channel
Ben McCallister, Urban Forestry Specialist
Purdue Forestry & Natural Resources
Recent Posts
- Jarred Brooke Receives Early Career Award for Prescribed Fire Work
Posted: July 20, 2026 in Forestry, Forests and Street Trees, Natural Resource Planning, Safety - Pruning Highlight; Espalier Pruning: Training Trees into Living Patterns
Posted: July 8, 2026 in Forestry, Forests and Street Trees, Gardening - Pruning Highlight-Pollarding Trees: A Traditional Pruning Practice with Modern Uses
Posted: June 11, 2026 in Forestry, Forests and Street Trees, Urban Forestry, Wildlife, Woodlands - Flat-Faced Longhorn Beetle Found in Hardwood Logs – IDNR Division of Entomology
Posted: June 8, 2026 in Alert, Forestry, Forests and Street Trees, Invasive Insects, Urban Forestry, Wildlife, Woodlands - Connecting Research to Practice: Natural Resources & Land Use Spring Training
Posted: June 5, 2026 in Forestry, Forests and Street Trees, How To, Invasive Animal Species, Invasive Plant Species, Land Use, Natural Resource Planning, Urban Forestry, Wildlife, Woodlands - Indiana Monarch and Pollinator Conservation
Posted: June 1, 2026 in Forestry, Forests and Street Trees, Gardening, How To, Natural Resource Planning, Plants, Urban Forestry, Wildlife - Spotted Lanternfly Feeds on Over 70 Plus Plant Species
Posted: May 20, 2026 in Alert, Forestry, Forests and Street Trees, Gardening, Invasive Insects, Urban Forestry, Wildlife - Mechanical Damage to Trees: Mowing and Maintenance Equipment
Posted: April 24, 2026 in Forestry, Forests and Street Trees, Urban Forestry - Spring Into Bloom With ID That Tree
Posted: April 20, 2026 in Forests and Street Trees, Urban Forestry, Woodlands - Tree Risk Management: What Every Property Owner Needs to Know
Posted: April 17, 2026 in Forests and Street Trees, Wildlife, Woodlands
Archives
Categories
- Alert
- Aquaculture/Fish
- Aquatic/Aquaculture Resources
- Ask the Expert
- Christmas Trees
- Community Development
- Disease
- Drought
- Forestry
- Forests and Street Trees
- Gardening
- Got Nature for Kids
- Great Lakes
- How To
- Invasive Animal Species
- Invasive Insects
- Invasive Plant Species
- Land Use
- Natural Resource Planning
- Nature of Teaching
- Plants
- Podcasts
- Ponds
- Publication
- Safety
- Spiders
- Timber Marketing
- Urban Forestry
- Webinar
- Wildlife
- Wood Products/Manufacturing
- Woodland Management Moment
- Woodlands