The summer issue of the Purdue Alumnus magazine highlights Gabrielle Sjoberg, FNR 2008, and the Nature of Teaching. The section titled “The Nature of Well-Being” shares how Boilermakers are making connections regarding the power of nature to improve our health, moods and thinking.
For Gabrielle Sjoberg (A’08), connecting people to nature has become her life’s work.
The wildlife science alumna, whose master’s degree in biology from Miami University focused on outdoor programming, has helped kids discover nature at the Indiana Dunes National Park, ran nature programs and camps at the Natural History Museum of Los Angeles County, and led youth conservation corps programs in Angoon, Alaska.
“I’m working with kids who, even though they’ve grown up in these remote wilderness areas, have not necessarily done much exploring in the bays and rivers,” says Gabrielle Sjoberg, FNR 2008.
The rural and Indigenous youths in the program work on projects such as clearing trails and fallen trees with program partners, including the United States Forest Service, and also help with the traditional seasonal harvesting, preservation, and distribution of foodstuffs that are crucial for locals: salmon, clams, moose, deer, herring eggs, blueberries, and beach asparagus.
For full article view, For Gabrielle Sjoberg (A’08), connecting people to nature has become her life’s work.
The Nature of Teaching
In 2005, when journalist Richard Louv published his groundbreaking book Last Child in the Woods: Saving Our Children from Nature-Deficit Disorder, research on the ways natural environments can benefit humans was just getting started.
The program’s three areas of focus—wildlife, food waste, and health and wellness—provide standards-based curricula along with suggestions for informal “field day” activities, all centered around getting kids outside.
The teachers said they needed training, good science-based lesson plans, and a repository of natural resource–related information they could easily access. In response, Dr. Rod Williams created a comprehensive professional development program for teachers called the Nature of Teaching, housed in the College of Agriculture’s Extension program.
Williams recently left Purdue for Texas Tech, where he serves as vice provost for outreach and engagement, but his legacy lives on in the Nature of Teaching program, which is now codirected by Veronica (Yager) Bullock (A’17) and Jarred Brooke (A’12), who is also an Extension wildlife specialist.
According to Bullock, who has taught many of the Nature of Teaching units as well as workshops for teachers, the lesson plans have been downloaded 400,000 times since the program’s launch. “That shows there’s a real interest in this,” she says.
The Nature of Teaching includes formal standards-based curricula and informal activity-based curricula all centered around getting youth outside. The three program areas of the formal curricula include: Wildlife, Health and Wellness, and Food Waste. Each program area provides standards-based lesson plans, available as free downloadable PDFs, which are classroom ready for grades K-12.
The Purdue Alumnus magazine, referred to as “Bulletin of the Purdue Alumni Association” in its early years, is the flagship publication of the Purdue for Life Foundation. It aims to inform, inspire and entertain readers through stories that provide insight into Purdue University and its initiatives, alumni, students, faculty and staff.
Purdue Landscape Report: August was National Check Your Tree Month, but this is something that every tree owner/manager should be doing year-round. As the last hot days of summer are finishing up and we look forward to cooler fall days, we can look to our trees for different signs of trouble.
Most people tend to look up at the canopy before anything else in trees. Check leaves for dieback, discoloration, stickiness or signs of chewing. Check branches and the main stem for damage like splits and breaks, peeling bark, tunneling patterns under the bark, oozing wet spots, or sawdust around the tree. These could be signs of issues in the root system, pathogens like bacteria or fungal organisms, insect problems, or structural damage.
This is not an exhaustive list and if you notice these or anything else that seems off, it could be time for a deeper dive into what might be wrong. If you know the species of your tree the Purdue Plant Doctor is a great tool to narrow down a diagnosis. You can also contact your local Extension office or an ISA Certified Arborist.
On a more positive side, you don’t have to be on the lookout for damage, decline, or signs of pathogens and pests. It is also a matter of enjoying the trees in your landscape. Take some time out of your day to sit in the shade especially as we transition from hot summer temperatures into the cooling of autumn. Revel in the color changes as chlorophyll production slows revealing the carotenoids (that give us yellows, oranges, and browns) and anthocyanin (that produces reds and purples). In winter, not only can you better see damage in the canopy hidden by leaves in the growing seasons, but also the structure and architecture of the canopies in different tree species and the differences in bark textures. And in Spring, new growth of leaves and flowers shows us Winter is nearing its end, bringing warmer days.
So check your trees throughout the year. But not only for potential issues and risk management but also for enjoyment. Trees offer us no many benefits and sometimes it takes a little reminder. If you do see any signs of decline or damage, again, be sure to contact your local Extension office or an ISA Certified Arborist.
Photo by Division of Entomology & Plant Pathology, Indiana Department of Natural Resources.
Weekly Review, Division of Entomology & Plant Pathology, Indiana DNR: Will Drews, Indiana Department of Natural Resources (DNR) Nursery Inspector & Compliance Officer with the DNR Division of Entomology & Pathology shares in September Weekly Review e-newsletter how staff will continue to help coordinate kudzu control throughout the state and expands upon the state funded kudzu control program.
As some of you may know, kudzu (Pueraria montana var. lobata) is an invasive woody vine that can now be found throughout the state of Indiana. It is referred to colloquially as “the vine that ate the south,” and if you took a drive through some southern states (e.g. Tennessee, Georgia, the Carolinas, etc.) right now, you’d see why. Kudzu has tremendous growth potential, sometimes as much as 1 foot per day. Some vines reach lengths of up to 100 feet. Because of this it is a detriment to Indiana’s natural resources, kudzu has been listed as a prohibited invasive plant under the DNR’s Administrative Code as per 312 IAC 18-3-16 Control of kudzu.
While part of the language includes that the landowner “must take efforts to eliminate this species in such a manner as is consistent with federal and state law,” the Division of Entomology & Plant Pathology have been leading a state funded control program where sites are treated on a rotating, priority basis to eradicate or suppress further spread with no cost to the landowner. Over the last month, around 40 kudzu sites in Indiana have been treated and we have seen some great progress from last year.
If you think you have seen a new kudzu population, please send me that information (photos and GPS coordinates or address) at my email address provided below. A couple of the sites treated this year are new reports from last year that we were able to address. With your help, we can try to reduce the impact of this incredibly invasive vine and protect our natural resources.
Will Drews, Nursery Inspector & Compliance Officer, Division of Entomology & Plant Pathology, WDrews@dnr.IN.gov
Indiana Department of Natural Resources (IN DNR)
MyDNR,Indiana’s Outdoor Newsletter: Hunters can apply for reserved hunts at on.IN.gov/reservedhunt, the one-stop information spot for the hunts. The online method is the only way to apply. No late entries will be accepted. Applicants must possess a hunting license that’s valid for the hunt for which they apply.
Applications must be submitted by 11:59 p.m. ET on Sunday, Sept. 15. More specific hunt information for individual properties is available on the website.
Hunters will be selected through a random computerized drawing. An email will be sent to all applicants when draws have been completed. Applicants will be able to view draw results online within two weeks after the application period closes.
Please note that only one application per hunt is allowed. No changes can be made once an application is submitted. The application process is now consolidated into the online services website along with licenses, CheckIN Game, and HIP registration. An online account is not required to apply, but a Customer ID number is needed.
In this system, hunts without a registration fee will follow the same process as those with a fee. Applicants must add a hunt to their cart and place an order to submit their application. If the transaction total is $0, the applicant will not be asked to enter credit card information.
Purdue Landscape Report: As summer comes to a close, plants are rapidly releasing seeds and the most noticeable are the flying fluffy type. Thistles, asters and milkweed are just a few of the summer-flowering plants that depend on the wind to disperse their seeds, sometimes carrying them miles away to potentially suitable locations, though seeds typically land within a few meters of the mother plant. This may not be a concern if it’s a desirable plant, but can become extremely problematic when that seed comes from Canada Thistle (Cirsium arvense) (Fig. 1).
Figure 1. Canada thistle (Cirsium arvense), growing amongst common ivy (Hedera helix), produces a fluffy seed that is dispersed by wind.
Canada thistle is found on the list of Indiana Noxious Weeds (IC 15-16-7-2), which mandates that landowners take necessary steps to control and contain the spread of this highly invasive species. Formal enforcement of this Indiana Code falls to Township Trustees, though weed control is a responsibility that is often overlooked. Landowners and homeowners shouldn’t wait for a notice, or knock at the door, from a Township Trustee to begin controlling Canada thistle. It’s listed as a noxious weed for good reason.
Canada thistle is a perennial plant that can reproduce from seed or rhizomes making it difficult to control and contain. Each plant can produce thousands of wind-blown seeds that may remain viable for up to 20 years in the soil. Rhizomes are horizontal underground stems that can grow several feet and put out new shoots (Fig. 2). To add insult to injury, if a rhizome is cut or tilled, a separate plant may grow from each piece of rhizome.
Mechanical and cultural control options for Canada thistle are limited and may reduce plant density, but are not effective at eradicating large, established populations in a landscape. A new population, without an established root system, may be controlled with frequent mowing to deplete food reserves and prevent seed production.Small, isolated populations may be controlled with hand-pulling, but this will need to be repeated every few weeks.
Figure 2. Canada thistle (Cirsium arvense) reproduces by growing horizontal underground stems called rhizomes. Rhizomes can send up new shoots several feet from the mother plant.
Chemical control options include pre- and post-emergent herbicides and, in many cases, applications of both types are needed for complete eradication. A pre-emergent herbicide, with an active ingredient of dichlobenil, is effective at preventing seed from germinating, but will not control established plants. A post-emergent herbicide with the active ingredient of clopyralid is the most effective option for home gardeners. Clopyralid is a selective herbicide for broadleaf weeds, but most vegetable and ornamental plants are susceptible. Precautions should be taken to avoid off-target damage. Read and understand the herbicide label before use. The label is the law.
Regardless of the method used, complete control of an established Canada thistle population will take persistence over multiple seasons. If the fluffy seed is beginning to fly from your thistle patch, it will likely take many more seasons to rid the garden of this pest, but it is possible. To win the battle against Canada thistle, it takes serious grit and an effective herbicide, or a good realtor.
Purdue Landscape Report: There have been a significant number of questions and problems regarding triclopyr that have come up this growing season.
Figure 1. Confirmed damage from triclopyr on sassafras shows the growth regulator-type injury on leaves. Photo courtesy of the Office of the Indiana State Chemist.
General Information about Triclopyr Triclopyr is a selective systemic herbicide belonging to the pyridine class. It is primarily used to manage woody plants, vines, and some broadleaf weeds. Unlike glyphosate, a broad-spectrum herbicide, triclopyr specifically targets the growth hormones in dicotyledonous plants, making it effective in controlling species that are difficult to manage with other herbicides. It works by mimicking plant hormones, disrupting normal growth processes, and leading to the death of the treated plant (Fig. 1).
What Triclopyr Controls Triclopyr is utilized in various settings to control unwanted vegetation. It is effective against species such as:
Woody Plants: Includes trees like tree of heaven and callery pear and shrubs like autumn olive and honeysuckle (Fig. 2).
Vines: Particularly those that can outcompete native flora, such as kudzu or English ivy (Fig. 3).
Broadleaf Weeds: Some herbaceous plants that pose ecological or agricultural problems.
Figure 2. Invasive plants, such as, Pyrus calleryana (callery pear) can be controlled by triclopyr.
Figure 3. Invasive vines, such as Hedera helix (English ivy) can be controlled via multiple applications of triclopyr.
Where and When Triclopyr is Used Triclopyr is applied in a range of environments, including:
Forestry: To clear invasive species and manage forest regeneration.
Agriculture: To control weeds and shrubs that interfere with crop production.
Aquatic Areas: Formulations that are safe for aquatic environments help manage invasive species near water bodies.
Rights-of-Way: To maintain clear paths and prevent the spread of invasive plants.
Timing of application is crucial. Triclopyr is most effective when applied during the growing season when plants are actively taking up nutrients and can transport the herbicide throughout their system.
Figure 4. Hack and squirt treatments with triclopyr is a common method to control invasive trees. Photo by Lenny Farlee.
Movement in the Plant Triclopyr is absorbed through foliage and roots and is translocated systematically within the plant. Once inside, it moves upward through the xylem and downward through the phloem (ambimobile). This systemic movement allows triclopyr to affect not just the treated areas but also parts of the plant that are not directly sprayed. This attribute makes it effective for managing large, established plants, specifically through hack and squirt treatments (Fig. 4).
It is in the vested interest of both humans and wildlife to reduce potential traffic collisions. Researchers in the Purdue Department of Forestry and Natural Resources and with the Indiana Department of Natural Resources looked at one possible option to do so in a five-year study involving the development and use of deer-reduction zones, areas where targeted recreational hunting was utilized to reduce animal-vehicle collisions.
“The initial goal for this research was to test a method for decreasing deer-vehicle collisions (DVCs) throughout Indiana,” Delisle said. “DVCs are quite frequent in Indiana. From 2003 to 2022, there were more than 300,000 reported DVCs in Indiana, with estimated costs to society of more than $2.5 billion dollars! Therefore, discovering a way to decrease the number of DVCs is important for deer management in Indiana.”
Researchers initially studied the activity of deer in delineated research units across the state, the findings of which are available in an article titled “Deer activity levels and patterns vary along gradients of food availability and anthropogenic development,” published in Nature’s Scientific Reports. The study examined the relationships between animal activity and the availability and quality of food, proximity to human development and other factors, utilizing trail cameras to sample more than 1,000 unique locations during the winters of 2019, 2020 and 2021.
“In that paper we found that deer in the northeast region of Indiana (what we called RMU 9) spend more of the day active than in other regions we studied,” Swihart explained. “Because traffic volume also tends to be higher during the day, deer in this region presumably are more likely to collide with a car. In the northeast region, we specifically estimated deer to be more active in the morning and less active at night, unlike the other regions.”
The publication summarizes the results:
“If animals either are active during a greater fraction of each day or shift their activity to coincide with periods of peak vehicular traffic volume, the chances of animals and vehicles colliding on the landscape likely will increase. In our study, we documented in RMU 9 the highest regional activity levels and a pattern characterized by a greater fraction of activity during the morning rush hours. Under such conditions, accidents involving collisions between motorists and deer might be expected. Indeed, deer-vehicle collisions occur at a rate 1.98 times higher in RMU 9 compared to RMU 3 and 4. Therefore, quantitative examinations of the relationships between characteristics of activity distributions and deer-vehicle collisions may help future management planning to reduce collisions. If positive relationships are found, incentivizing humans to hunt deer in close proximity to roadways may reduce occurrence of deer-vehicle collisions by causing deer to shift to nocturnal activity patterns, reduce movement rates, or select areas further from roads.”
Based on the results of the initial study, researchers tested how well policies designed to increase human hunting of deer (longer hunting seasons and increased harvest limits) reduced deer-vehicle collisions along 618 kilometers (or 384 miles) of high-risk roadways, or those in the upper 99th percentile in terms of DVCs.
Of the 51 selected roadways covering 949 km, relaxed hunting regulations were implemented among 15 of them, designated as treatment deer reduction zones (DRZs), while 36 roadways were left as is, designated as control DRZs. All parcels of land within 0.8 km of the high-risk road were included as part of the deer-reduction zone.
A unique license was developed specifically for hunters pursuing deer within treatment DRZs, with a cost ranging from $24 to $240 depending on the year and a hunter’s residence status.
Findings from the study show both a decrease in number of deer-vehicle collisions and the amount of economic damages from those accidents, as well as increased revenue for the local wildlife management agency. The publication details:
“We estimated a strong interaction between treatment type and initiation of DRZs. Deer reduction zones decreased DVCs by a predicted 21.12 % along 618 km of high-risk roadways and prevented an estimated 69.6 DVCs from 2018 to 2022. Deer reduction zones saved up to $653,756 in economic damages to society during the 5-y treatment period. This total savings included $483,983 in estimated vehicular damage, $123,180 in avoided fatalities, and $46,593 in avoided injuries. The DRZs brought in $206,268 in revenue from license sales.”
Delisle said the success of the study lies not only in the fact that the methods tested worked in reducing DVCs, but also in the potential supplemental revenue for wildlife agencies, which are often underfunded and overwhelmed.
“Our findings are unique in that most previously tested methods for reducing DVCs cost a lot of money to implement, but our method actually generated revenue from hunting licenses,” Delisle noted. “We also found a way to decrease DVCs, which is massive in terms of the cost savings to society and the potential prevention of human injuries and fatalities, which unfortunately do occur in DVCs. In addition to nontraditional stakeholders, which could be defined as anyone driving a car in Indiana, our method for reducing DVCs also gives traditional stakeholders (i.e., hunters) more opportunities to harvest deer in certain areas of Indiana. Needless to say, we were very pleased with these findings because it was the first test of such methods across very large scales germane to state wildlife management.
“Knowing that we were able to figure out that increased recreational hunting worked at reducing DVCs feels special because we may have prevented someone from getting seriously hurt or killed. Personally, being able to analyze data on an experiment like that this has the potential to really influence how deer are managed in Indiana as well as help people (prevention of costs, human injuries and human fatalities) was really cool and I am thankful to have been given the opportunity to work on this project with my coauthors.”
Caudell believes that there is a future in applying these research findings beyond the original test areas and said the Indiana DNR is already working to do so.
“Now that we have evidence that this method can reduce deer vehicle collisions, the DNR is in the process of adding these deer reduction zones to our rules so that hunters will continue to use these areas over time,” Caudell said. “DNR’s deer biologists will also look for other areas around the state where we would expect this season to be effective and possibly expand the reduction zones to new areas around the state.”
Although the study shows that increased human hunting decreased the number of deer-vehicle collisions, more work must be done to explain the connection between hunting and a reduced number of accidents.
Delisle explains that the group has two main hypotheses: (1) the population density of deer may be reduced before most DVCs occur (mid-October to December), hence, there are fewer deer on the landscape to collide with vehicles; and (2) there is a behavioral change in deer where deer avoid areas with more human hunters (again, behavioral change before mid-October to December).
“Ultimately, although the findings of this project were pretty neat, more research is needed to discover what ecological mechanism is driving the reduction in DVCs,” Delisle noted. “As is typical in the awesome process of science, someone else will need to make that discovery.”
Beyond establishing the connection between hunting and reduced deer-vehicle collisions, another more specific hypothesis, related to No. 2 above, involves expanding the research to examine collision rates with bucks and does.
“Other researchers have shown that deer adjust their activity to avoid risky times and risky places, with greater tolerance for risk during breeding seasons (for bucks) and fawn-rearing seasons (for does),” Swihart said. “So, a prediction that could be tested in future research is that deer-reduction zone policies, which do not include fawning season, should be more effective in reducing deer-vehicle collisions with does than with bucks because does will be more likely to adjust their activity in response to greater hunting risk during fall/winter.”
Purdue Landscape Report: Early June, we received a white pine sample at the Purdue University Plant and Pest Diagnostic Lab that showed early season needle loss lower in the tree canopy (Figure 1, 2). The majority of conifers hold onto their needles for multiple years, so loss of needles, even in the fall, can come as a shock to homeowners. In this particular case, we found multiple fungi that could be contributing to needle blight or needlecast.
Figure 1: Eastern white pine trees with early season needle loss.
Figure 2: Closeup images of white pine with needlecast. Multiple fungi were present: Lophodermium, Lecanosticta, and, Septorioides. Note, primarily the older needles have been affected. New needles appear green and healthy.
The first two fungi were determined to be relatively common pathogens for Indiana: Lophodermium and Lecanosticta (brown spot). Symptoms appeared relatively typical for these pathogens where the needles turned brown over-time. However, there were other needles in the canopy and on the sample that had a lighter coloration. We found small black fungal structures dotted along the length of these needles producing light colored cirrhi (also called spore horns) (Figure 3). After examining the fungal spores, isolating the fungus, and performing DNA testing, we determined this third fungus to be Septorioides strobi, the causal agent of Septorioides needle blight of pines. This fungus has been determined to be a contributor to white pine needle damage/defoliation.
Figure 3: Black fungal structures developing on dead needles with white sporulation exuding from the top.
White pine needle damage/defoliation (WPND) was first observed in the state of Maine in 2010 and was attributed to three needle blight diseases, including Lecanosticta, and has since been observed throughout the Northeast US. However, researchers eventually determined that a new fungus, Septorioides strobi, was also found consistently in blighted needles and could be contributing to WPND.
This is the first time we have found this fungus in the state of Indiana, though it has been present for longer than a single season. We do not know how it will react to our climate nor if it will cause significant damage to affected trees. Like other needle blight pathogens, Septorioides has been observed to sporulate around the same time during humid, wet weather, but symptoms may not develop until the following year. White pines are the primary host for this needle cast disease, but it can also develop on 2, 3, and 5 needle pines. While we see white pine decline is a major problem, Septorioides will not likely be the final nail in the coffin for white pines in Indiana, though it certainly will not help us keep them healthy.
MyDNR,Indiana’s Outdoor Newsletter: As a result of Indiana’s positive detection of chronic wasting disease (CWD) in LaGrange County in April, Indiana DNR has restricted moving deer from any CWD Positive Area for rehabilitation purposes.
With the change, an individual who finds an orphaned, sick, or injured deer in a CWD Positive Area may only surrender the deer to a DNR-permitted wild animal rehabilitator that is located within a CWD Positive Area. This restriction is to help minimize the spread of CWD to new parts of the state, as deer can carry this disease without appearing sick.
Currently, there is one CWD Positive Area in Indiana. It includes LaGrange, Steuben, Noble, and DeKalb counties. While no CWD positive deer have been documented in Steuben, Noble, or DeKalb counties, those counties are considered part of the CWD Positive Area because of their proximity to where the state’s first CWD-positive deer was found in LaGrange County.
During their first few weeks of life, fawns often hide by themselves and stay motionless to avoid predators while the mother is looking for food. If you find a fawn alone, you can help it by letting it be, giving it space, and leaving the area. Its mother is likely nearby.
The Indiana Natural Resources Teacher Institute (NRTI) is an annual multi-day conservation education workshop and tour of forest management, forest industry and forestry research in Indiana. The purpose of the institute is to provide an introduction to the impact sustainable forestry has on our state’s environment, economy, and quality of life, and to equip teachers to apply that knowledge in the classroom.
The 5-day workshop advances effective teaching and learning about Indiana’s forest resources and their management. Participants will learn how to approach the teaching of STEM (science, technology, engineering and math) concepts and principles from a natural resource perspective through exposure to professionals, researchers, and industry leaders and hands-on experiences in the field. Participants develop a curriculum project to be implemented with their students, bringing natural resource science and management topics and activities into the classroom.
Natural Resources Teacher Institute participants discuss natural resource issues as part of a Project Learning Tree activity session.
Several partners and many sponsors and supporters facilitate this program. The Indiana DNR Division of Forestry Project Learning Tree Coordinator, Lexi Eiler, serves as the lead on this project, and the Division provides housing for the participants at the Morgan Monroe State Forest Training Center. Donna Rogler, the originator of the Indiana NRTI, Lenny Farlee, Purdue Forestry and Natural Resources Extension Forester, and Mary Cutler, Tippecanoe County Parks and Recreation Naturalist, serve as Instructors/facilitators with Lexi for the week of activities and tours. Each of these individuals is also an alumnus of Purdue Forestry and Natural Resources!
Presenters from several agencies, organizations, and companies assist with field tours and presentations, including a tour and activities on the Hardwood Ecosystem Experiment site at Morgan Monroe State Forest. The connection with this long-term, large-scale research project provides a unique STEM application teachers can take back to their classrooms.
Participants experience forest science, forest management, and forest products processing at the Natural Resources Teacher Institute.
The NRTI program can accommodate up to 16 teachers, with emphasis on primary educators, but welcoming to educators from all ages and backgrounds. Many past participants have called this week the best professional development training they have attended. Some comments from our most recent class in June of 2024:
“It was amazing. I am grateful for the activities and all the fantastic materials provided.”
“I learned so much about forestry and forest ecology. I can’t wait to share my lesson with the students.”
“Loved my time at the Indiana Natural Resources Teacher Institute! I learned so much and can’t wait to share and do activities at school this year.”
Teachers meet with Indiana DNR foresters to learn about forest management techniques on state forests.
