Got Nature? Blog

In this edition of ID That Tree, we’re going to introduce you to two species found in Indiana. One of them is a native called blackhaw, and the other an invasive called burning bush. Blackhaw has opposite simple leaves, very finely toothed margins, and elongated buds that have a grey haze to them. It also has a striking fall color. Burning bush on the other hand is an invasive spread by seeding itself through birds and other wildlife. It also has opposite leaf arrangement but much smaller leaves that are a bit more elongated.

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, Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel (Invasive White Mulberry, Siberian Elm, Tree of Heaven)
Invasive Species Playlist, Playlist, Purdue Extension – FNR YouTube Channel (Asian Bush Honeysuckle, Burning Bush, Callery Pear, Multiflora rose)
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)
Invasive Plant Series: Winged Burning Bush, Got Nature? Blog, Purdue Extension – FNR
Invasive Plant Series: Winged Burning Bush, The Education Store
How long do seeds of the invasive tree, Ailanthus altissima remain viable? (Invasive Tree of Heaven), USDA Forest Service
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
Investing in Indiana Woodlands, The Education Store
Professional Forester, Indiana Forestry Woodland Owners Association
District Forester 10+acres of woodlands, Indiana Department of Natural Resources
Forest Improvement Handbook, The Education Store

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


In this edition of ID That Tree, we’re going to introduce you to a native Indiana species, and that’s grey birch. It can be found in the northern part of Indiana near Lake Michigan. It can be defined by its long and pointed triangular shape, and it toothed margins on the edges of the leaf. It has very limber twigs and the leaves are arranged alternately. Also the fruiting flower structure can be identified as a catkin.

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, Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel (Invasive White Mulberry, Siberian Elm, Tree of Heaven)
Invasive Species Playlist, Playlist, Purdue Extension – FNR YouTube Channel (Asian Bush Honeysuckle, Burning Bush, Callery Pear, Multiflora rose)
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)
How long do seeds of the invasive tree, Ailanthus altissima remain viable? (Invasive Tree of Heaven), USDA Forest Service
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
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store

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


In this edition of ID That Tree, we’re going to introduce you to a native Indiana oak species, and that’s blackjack oak. It can be found in high, dry, rocky ridges where soil moister is limited. It can be defined by it’s bear paw shaped leaves that tend to be very shiny and waxy on top, and have a leathery texture. While on the underside it tends to have a rusty color.

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, Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel (Invasive White Mulberry, Siberian Elm, Tree of Heaven)
Invasive Species Playlist, Playlist, Purdue Extension – FNR YouTube Channel (Asian Bush Honeysuckle, Burning Bush, Callery Pear, Multiflora rose)
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)
How long do seeds of the invasive tree, Ailanthus altissima remain viable? (Invasive Tree of Heaven), USDA Forest Service
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, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store

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


Posted on November 6th, 2023 in Forestry, How To, Safety, Wildlife, Woodlands | No Comments »

Wild Bulletin, Indiana Department of Natural Resources (DNR) Fish and Wildlife: Join the fun this fall and hunt one of Indiana’s gorgeous grassland birds. Quail hunting in Indiana starts on Nov. 10 and requires a Game Bird Habitat Stamp and a general hunting license. These species are present in grasslands across the state, such as Goose Pond FWA and Glendale FWA. There are no equipment restrictions for quail, but we recommend a 12- or 20-gauge shotgun with 6 to 9 shot. Remember to wear your hunter orange!bob white quail in vigo county

Some DNR properties may have additional regulations for quail hunting. Check with the property you’re planning to hunt for more details.

General Characteristics:
Northern bobwhites are a ground-dwelling species that only rely on flight on rare occasions. They rely on cryptic plumage color combinations and contrasts that provide excellent camouflage. They are minimally sexually dimorphic, meaning males and females have different physical characteristics. In the case of the Northern bobwhite, males have a white throat and chin, along with a white stripe above the eye extending to the back of the head. Those same areas on a female, are buffy brown in color. Underparts are tawny and white, blending with chestnut and gray. Each breast feather sports a black chevron. Upper parts of the shoulders, back, and rump, are a mixture of warm brown, cream, and shades of black. In Indiana, adult Northern bobwhites weigh an average of 180 grams (~6.5 ounces) and are about 10 inches long from bill tip to tail.

To identify and learn more about this species, please visit DNR: Fish and Wildlife: Northern Bobwhite.

Subscribe to Wild Bulletin.

Resources
Quail Habitat: Putting the Numbers in Perspective – The Education Store, Purdue Extension Resource Center
Bobwhite Quail – Indiana Department of Natural Resources
Developing a Wildlife Habitat Management Plan – Purdue Extension
Breeding Birds and Forest Management: The Hardwood Ecosystem Experiment and the Central Hardwoods Region – The Education Store
Small Woodlots: Important Rest Stops for Migratory Songbirds – The Education Store
Subscribe to Purdue Extension-Forestry & Natural Resources YouTube Channel, Wildlife Playlist
Ask An Expert, Purdue Extension – FNR Playlist

Indiana Department of Natural Resources


In this edition of ID That Tree, we’re going to introduce you to a native Indiana vine that has a strong association with fall decorations, and that’s American Bittersweet. Learn how to tell the difference between American Bittersweet and the lookalike invasive vine.

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, Playlist, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel (Invasive White Mulberry, Siberian Elm, Tree of Heaven)
Invasive Species Playlist, Playlist, Purdue Extension – FNR YouTube Channel (Asian Bush Honeysuckle, Burning Bush, Callery Pear, Multiflora rose)
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)
How long do seeds of the invasive tree, Ailanthus altissima remain viable? (Invasive Tree of Heaven), USDA Forest Service
Indiana Department of Natural Resources: Invasive Species
Indiana Invasive Species Council
Cooperative Invasive Species Management Area (CISMA)
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, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store

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


MyDNR, Indiana’s Outdoor Newsletter: When you purchase this limited edition shirt, you are helping reforest Indiana. For each shirt sold, the Natural Resources Foundation will partner with the Indiana Department of Natural Resources – Division of Forestry and plant one tree in an Indiana State Forest to celebrate Arbor Day and Earth Day.tree shirt original

Along with each shirt, you’ll receive an official tree certificate with a unique tree ID and the coordinates for the acre where the tree will be planted. If you are interested in participating in the next public tree planting, please e-mail Cheryl Hampton at champton@dnr.in.gov to receive updates.

The types of trees planted are native Indiana hardwoods and typically upland and bottomland oaks, walnut, black cherry and other species that are in need of restoration.

To buy a shirt and learn more please visit the store page.

For more information on the Indiana Tree Project please visit the Indiana Natural Resources Foundation.

Sign up to receive the MyDNR Newsletter by email: MyDNR Email Newsletter

Resources:
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store
ID That Tree, Purdue Extension-Forestry & Natural Resources (FNR) YouTube playlist
Woodland Management Moment , Purdue Extension-FNR YouTube playlist
Find an Arborist, International Society of Arboriculture
Planting Your Tree Part 1: Choosing Your Tree, Purdue Extension YouTube Channel
Native Trees of the Midwest, Purdue University Press
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Finding help from a professional forester, Indiana Forestry & Woodland Owners Association
District Foresters for 10 plus acres, Indiana Department of Natural Resources

Indiana Department of Natural Resources


Posted on October 30th, 2023 in Alert, Disease, Forestry, Plants, Wildlife, Woodlands | No Comments »
declining tree

Figure 1: Mature oak tree known to be infected by Inonotus dryadeus on Purdue University West Lafayette campus. Right image shows limb death suggestive of tree decline.

Purdue Landscape Report: Inonotus dryadeus is one of the more common wood decay fungi we receive at the diagnostic lab in association with declining trees, specifically oaks. Inonotus is found so frequently on oaks it has the common name oak bracket fungus, but it can cause root rot of a number of other hardwood trees (including maples, sweet gum, buckeyes, chestnut, and ash) and conifers (fir, pines, spruce, and hemlock – mostly in western US).

Similar to other butt and root rots of trees, Inonotus causes internal decay near the base of the tree. Trees may not show any external symptoms while there is a raging root rot decaying everything holding it up, eventually leading to an unexpected failure of the tree during a windstorm. Trees with compromised root systems may also die suddenly during hot and dry weather. Most often, we see a gradual decline of infected trees with stunted growth, limb dieback, and/or sparse, off-color foliage; symptoms that may accelerate during adverse environmental conditions (Figure 1).

The only good thing about this fungus is that it is somewhat easy to identify. Inonotus produces a round to irregularly-shaped conk like structure each year from colonized host tissue, such as exposed roots, the trunk at the soil-line, or lower trunk (Figure 2). When it is young the conk is yellow to orange on the upper surface and white on the underside. Pores in the upper surface of the conk producing amber colored liquid can also be found earlier in the spring and early summer, lending to its other common name the weeping conk (Figure 3).

growth at base of tree

Figure 2: Extensive growth of Inonotus dryadeus from the base of an oak tree. The tree had significant limb dieback, was at risk of falling over, and subsequently removed.

early growth with amber liquid

Figure 3. Inonotus conks with amber droplets on their upper surface.

To view this full article and other Purdue Landscape Report articles, please visit Purdue Landscape Report.

Subscribe and receive the newsletter: Purdue Landscape Report Newsletter.

Resources:
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
Autumn Highlights Tour – South Campus, Purdue Arboretum Explorer
Subscribe, Purdue Extension – FNR YouTube Channel
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

John Bonkowski, Plant Disease Diagnostician
Departments of Botany & Plant Pathology


Purdue Landscape Report: Temperatures are finally dropping and leaves are changing color. Autumn is progressing well in my opinion. Before you know it winter will be here, and some people will be wondering is there anything to be done to better protect the trees around you?  The answer is yes, and I applaud you for your initiative to continue caring for your trees. To give your trees the best chance to survive the winter and better thrive next year there is an assortment of activities available ranging from diy projects up to calling in an ISA certified arborist to help you out.

fall tree maintenance

Figure 1. Maintenance of trees in the fall include many tasks before dormancy occurs.

Mulching:
One simple task to better prepare your trees for winter is to add a new layer of mulch, which benefits your trees in multiple ways. Adding a 2-3 inch thick layer of mulch will better maintain moisture levels and buffer extreme temperature changes in the soil and will add some organic matter too. Mulching to the drip line will benefit the tree the most, but in the case of larger trees it’s not always feasible. Try for at least a 3-foot radius from the trunk and make sure to leave a 2 inch or so gap between the trunk and the mulch. Remember, no volcano mulching.

Fertilizing:
That mulch you just added will add some organic material to your soil as it slowly breaks down, but an autumn fertilization can benefit your trees too. Unlike trees in the forest that have a natural supply of nutrients from fallen leaves and twigs, trees around our homes are usually deprived as we rake and clean up our yards. Adding a slow-release fertilizer in the fall helps provide a nutrient boost over the winter, can promote root growth, and better prepare your tree for Spring.

Watering:
Water is still an essential part of your tree care plan, but as temperatures drop and trees begin to head into dormancy they don’t need as much water as is required in the hit summer months. If you have irrigation systems in your yard start to drop the frequency of watering. You can water up until the first freeze, but make sure soils are just a little damp and not soaked. Evergreens in particular will benefit from slow deep watering 1-2 times a week until the soil freezes. Winter winds and temperatures can desiccate the needles without an adequate supply of water.

Pruning:
Now is a good time to prune out any dead, damaged, or diseased limbs in your trees. If you have access to hand saws and pole saws or pruners, you can remove smaller branches or those closer to the ground. Make sure you are making proper pruning cuts though, and if there are large limbs, those at heights, or you are just unsure of how to make a good cut enlist the help of a professional arborist.

Trunk damage:
Sunscald or southwest damage occurs on young and/or thin barked trees in the winter. Wounds can occur between the south to southwest facing part of the trunk on sunny days in the winter as temperatures rise and suddenly drop. Over time these wounds can become quite large. Trees can also incur damage from deer during the rut. Bucks will scrape trees with their antlers, scraping off the bark and damaging the cambium. Both of these injuries can be reduced one younger trees by installing tree guards in the fall. Tree guards are plastic barriers you place around the main stem of the tree. I recommend using white corrugated drainage pipe that can be found at most home centers. You can make a cut lengthwise along the pipe for easy installation and make sure it has a large enough diameter to leave a space between it and the tree. Just remember to remove it come Spring.

Inspections:
Visual inspections can be done year-round, but this time of the year it might be easier to see changes in your tree as leaves are falling and the canopy becomes more visible. From the ground up to the canopy, some of the things you’re looking for include fungal growth around the base of the tree, any sort of damage on the main stem or branches, premature leaf drop or color change, and branches that are dead, cracked, diseased, or seem weak. Any concerns you find are also great information to share with an ISA Certified arborist which can be found using the Trees Are Good website.

To view this full article and other Purdue Landscape Report articles, please visit Purdue Landscape Report.

Subscribe and receive the newsletter: Purdue Landscape Report Newsletter.

Resources:
Re-mulch Your Trees, Purdue Landscape Report
Pruning, Purdue Landscape Report
Southwest Damage/Sunscald, Purdue Landscape Report
Planning the Tree Planting Operation, The Education Store, Purdue Extension’s resource center
Tree Risk Management – Got Nature? Blog, Purdue Extension – FNR
Tree Planting Part 2: Planting Your Tree, The Education Store
Planting Your Tree Part 1: Choosing Your Tree, Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel
Summer Tree Care, Purdue Landscape Report
Tree Defect Identification, The Education Store
Tree Wound and Healing, Got Nature? Blog, Purdue Extension – FNR
Surface Root Syndrome, The Education Store
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
Subscribe – Purdue Extension-FNR YouTube Channel

Ben McCallister, Urban Forestry Specialist
Purdue Forestry & Natural Resources


Forest with trees and grasslands, Forest Management Courses.The Indiana Natural Resources Conservation Service (NRCS) is offering an opportunity for landowners to apply for cost assistance with conservation practices like tree planting, forest stand improvement, invasive species control, wildlife habitat improvement and many others.

U.S. Department of Agriculture, Natural Resources Conservation Service News Release, Indianapolis, IN, October 11, 2023 – Farm Bill program application dates have been set for Indiana’s agricultural producers who want to improve natural resources and address concerns on their land. Curtis Knueven, USDA-Natural Resources Conservation Service (NRCS) Acting State Conservationist, announced that December 8 will be the application deadline for the Environmental Quality Incentives Program (EQIP) and Conservation Stewardship Program (CSP) in Indiana. This year’s funding levels are a historic high for Indiana NRCS, bringing $42 million in EQIP and $22 million in CSP for Indiana landowners.

EQIP is a voluntary conservation program available for agricultural producers. Through EQIP, NRCS provides financial and technical assistance to install conservation practices that reduce soil erosion and sedimentation, improve soil health, improve water and air quality and create wildlife habitat. Also included in this sign up are several state and national initiatives. A full list of initiatives can be found by visiting www.nrcs.usda.gov/programs-initiatives/eqip-environmental-quality-incentives/indiana/environmental-quality-incentives.

“EQIP helps agricultural producers in a manner that promotes agricultural production and environmental quality as compatible goals,” said Knueven. “Farmers can receive assistance to implement structural and management conservation practices that optimize environmental benefits on their working agricultural land while helping to increase their yields.”

CSP is an important Farm Bill conservation program that helps producers who are already practicing good stewardship to take their natural resource management to the next level. The program helps to improve both their agricultural production and provide valuable conservation benefits such as cleaner and more abundant water, as well as healthier soils and better wildlife habitat.

“Whether you are looking to improve grazing conditions, increase crop resiliency, or develop wildlife habitat, we can custom design a CSP plan to help you meet those goals,” Knueven said. “We can help you identify natural resource problems in your operation and provide technical and financial assistance to solve those problems or attain higher stewardship levels in an environmentally beneficial and cost-effective manner.”

While applications are accepted year-round, interested producers should work with their local NRCS staff and apply by December 8 to be considered for the current funding period. Applications received after December 8 will automatically be considered during the next funding cycle.

For more information about Farm Bill programs and other technical and financial assistance available through Indiana NRCS conservation programs, visit www.nrcs.usda.gov/indiana or contact your district conservationist www.farmers.gov/working-with-us/service-center-locator.

Resources:
Woodland Stewardship for Landowners: EQUP, video, Purdue Extension-Forestry and Natural Resources (FNR) YouTube Channel
Woodland Stewardship for Landowners: Single Tree and Patch-Cut Harvesting, Purdue Extension – FNR Video
Woodland Stewardship for Landowners YouTube Playlist, Purdue Extension – FNR
Woodland Management Moment: Invasive Species Control Process, Purdue Extension – FNR Video
Woodland Management Moment YouTube Playlist, Purdue Extension – FNR
Invasive Species YouTube Playlist, Purdue Extension – FNR
What are invasive species and why should I care?, Got Nature? Blog, Purdue Extension – Forestry and Natural Resources
Report Invasive Species, Purdue Invasive Species
The GLEDN Phone App – Great Lakes Early Detection Network
EDDMaps – Early Detection and Distribution Mapping System
Hardwood Ecosystem Experiment: Uneven-aged Management, Purdue Extension – FNR Video
Hardwood Ecosystem Experiment: Even-aged Management, Purdue Extension – FNR Video
Finding help from a professional forester, Indiana Forestry & Woodland Owners Association
Forest Improvement Handbook, The Education Store, Purdue Extension resource center

Natural Resources Conservation Service
U.S. Department of Agriculture

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


Posted on October 13th, 2023 in Alert, Forestry, Plants, Wildlife, Woodlands | No Comments »

Purdue Landscape Report: Mites are eight-legged arthropods who pierce plant cells to feed on them.  Plants that are attacked by mites lose their green color and appear somewhat bronzed. Spider mites will make webs to help them forage on leaves unencumbered by irregular leaf surfaces. The accumulation of webs, and old skins of mites can give heavily infested plants a dusty appearance. This can make plants unsightly and affect their health.

Plants infected with mites

Figure 1. Plants infested with mites appear to be bronzed from tiny stipples.

serviceberry leaf with red mites, eggs, and shed skins

Figure 2. This serviceberry leaf has live European red mites, eggs and old shed skins that accumulate on the leaf.

Lack of rain this summer and fall has spared spider mites from drowning and being washed off leaves during heavy rains.   Warm weather in late August and September allowed warm season mites, like two spotted spider mite, European red mite on flowering fruit trees, honeylocust, maple and oak spider mites to flourish. With the daily highs consistently below 85 F, cool season mites like spruce spider mite, boxwood spider mite and southern read mite have been increasing in number.

Now would be a good time to take stock of which plants have spider mites to help you plan your control strategy.

man demonstrating how to look for mites

Figure 3. Tap the branches over a white sheet of paper. After giving the mites 10 seconds to grab hold of the paper, turn the sheet sideways to let the debris fall off. Then examine the specs to determine if they are spider mites. A 10X hand lens or smartphone can help you see these small pests.

Cool season mites, including southern red mite, boxwood spider mite and spruce spider mite may require treatment this fall to keep their populations from building. This could be accomplished with a garden hose and a strong stream of water or a 2% solution of horticultural oil or insecticidal soap.

At this point in the season, there is usually no need to spray trees for warm season spider mites.  Because most spider mites will winter on trees and shrubs, these mite infested trees can be targeted for a spray of oil during the dormant season.  It is important to note that plants with two spotted spider mites will not benefit from an oil spray because they winter in the ground cover. Also, be sure not to spray oil on shrubs with waxy blue leaves. This wax often protects plant leaves from strong winds and sun in the winter.

To view this full article and other Purdue Landscape Report articles, please visit Purdue Landscape Report.

Subscribe and receive the newsletter: Purdue Landscape Report Newsletter.

Resources:
Managing Spider Mite Mayhem with the Purdue Plant Doctor, Purdue Extension Entomology YouTube Channel
Purdue Plant Doctor Website
Spider Mites On Ornamentals, Purdue Extension Entomology Bulletin
Tree Defect Identification, The Education Store
Tree wounds and healing, Got Nature? Blog
Tree Risk Management – Got Nature? Blog, Purdue Extension – FNR
Why Is My Tree Dying? – Got Nature? Blog, Purdue Extension – Forestry and Natural Resources
The Woody Plant Seed Manual, U.S. Forest Service
Native Trees of the Midwest, The Education Store
Invasive Species, Playlist, Purdue Extension – FNR YouTube Channel
Report Invasive Species, Purdue Invasive Species
Find an Arborist, International Society of Arboriculture
Subscribe Purdue Extension-Forestry and Natural Resources YouTube Channel

Cliff Sadof, Professor and Extension Fellow
Purdue Entomology


Got Nature?

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