Info from the DNR
Friday- Saturday - Sunday
Noon - 6 pm
All other days please come to the clubhouse to check out boats
Where good friends get together
Starting Friday 5/28
Monday - Thursday: 9 am-9 pm
Friday & Saturday : 9am- 10 pm
Sunday : 9 am- 8 pm
March 29, 2022
Contact: Drew Rayner, 517-231-8763, or Joanne Foreman, 517-284-5814
Plan now for spring treatment of hemlock woolly
If hemlock trees on your property show signs of hemlock woolly adelgid infestation, now is a good time to plan for spring treatment of this invasive species. Hemlock woolly adelgid, native to Asia, is known to be present in areas of Allegan, Mason, Muskegon, Oceana and Ottawa counties in Michigan. These small insects suck sap from hemlock needles and ultimately can cause tree death.
Insecticides are available to control the insect, and in many cases, landowners easily can apply them by carefully following label instructions and application rate guidance. In Michigan, the label is the law. Due to certain restrictions on the use of these insecticides, you may need the services of a licensed pesticide application business.
If one or more trees are infested, make plans to act this year. Without treatment, trees with hemlock woolly adelgid are likely to die within four to 10 years. Weakened trees on a home landscape could spell disaster during high winds or storms, and eventually they will have to be removed. Loss of hemlocks in forested areas can reduce shade, winter cover, food and habitat for birds, fish and mammals.
Products containing either imidacloprid or dinotefuran as the active ingredient and labeled for treatment of hemlock woolly adelgid are effective in combatting the insect.
• Imidacloprid moves slowly through trees, taking at least a year to reach the top of a large tree. However, one application will protect the tree for at least five years.
• Dinotefuran moves through hemlock trees more quickly, making it ideal for heavily infested trees. Dinotefuran protects trees for one to two years.
No matter which treatment you select, be sure your treatment plan includes all hemlocks on your property over the next few years. If hemlock woolly adelgid is on your site, hemlocks without symptoms are very likely to be infested over time. This includes trees on your property as well as neighboring properties. It’s a good idea to discuss treatment plans with neighbors and coordinate efforts when possible.
Can I treat trees myself?
Application of imidacloprid or dinotefuran is simple enough for many landowners to do themselves. Products containing these chemicals are available at garden supply stores, packaged under various trade names in liquid or granular form. Check the label or ask for assistance in selecting the right product.
Imidacloprid and dinotefuran products available at garden supply stores generally are applied to the soil close to the tree trunk, where they are absorbed through the root system. Plan your application for a time between early April and late October when the ground has thawed and soil moisture is moderate – not too dry or saturated. The sooner you treat, the more successful your treatment will be.
Follow all label directions, wear appropriate safety gear and determine the right application rate to ensure positive results. To protect the environment, do not allow pesticide to enter or run off into storm drains, drainage ditches, gutters or surface waters.
Some products have restrictions on the amount that can be applied to an area per year. Be sure to read the label carefully to determine if the amount you need falls within these limits. If not, you may need to adopt a multiyear plan or hire a professional.
More information on do-it-yourself treatment can be found in the MSU Extension bulletin: Guidelines for homeowner treatments of hemlock trees infested with hemlock woolly adelgid, available at Michigan.gov/HWA.
When should I call a professional?
Licensed pesticide application businesses have a broader range of options for applying treatments than consumers, and their professional skills are recommended in certain situations. A county-by-county list of businesses holding pesticide application licenses can be found on the Michigan Department of Agriculture and Rural Development’s website, Michigan.gov/MDARD. For lawn or landscape trees, look for a professional licensed in the “ornamental” category (3B); for forest trees, choose the “forestry” category (2).
If your hemlock trees are within 75 feet of a body of water or in areas with a high water table, or if flowering plants or shrubs are growing around the hemlocks you wish to protect, a trunk injection or bark treatment may be necessary to avoid affecting the environment, groundwater or other insects. Professional applicators can provide these types of treatments.
What should I expect after treatment?
Hemlock woolly adelgid’s cottony, white ovisacs will linger for a time following treatment. If trees are treated in the spring with dinotefuran, check new growth in late fall or winter for any fresh signs of infestation. With imidacloprid, wait until a year after treatment to gauge effectiveness.
After treatment, trees should be checked every year. If the insect has returned after dinotefuran was used, reapplication may be needed after one to two years. For imidacloprid, consider retreatment every five to seven years.
Do my trees have hemlock woolly adelgid?
If you have hemlock trees on your property, it is important to check them for signs of hemlock woolly adelgid, which infests only hemlock trees. If you are not sure whether your trees are hemlocks, use the Michigan Invasive Species Program’s eastern hemlock identification guide.
The adelgid’s round, white, cottony ovisacs are most visible in the winter and are located on the undersides of hemlock branches at the base of the needles. The publication Hemlock Woolly Adelgid Look-Alikes, available at Michigan.gov/HWA, provides images and information on identifying this and other pests commonly mistaken for it.
How do I report an infestation?
If you suspect trees on your property have hemlock woolly adelgid, report it using the Midwest Invasive Species Information Network at MISIN.MSU.edu. You can report from the field using the MISIN smartphone app, which will log the location and allow you to upload photos of the suspected signs of the insect.
You also can take pictures, note the tree’s location and email the information to the Michigan Department of Agriculture and Rural Development at MDA-Info@Michigan.gov or report by calling 800-292-3939. Someone will respond to let you know if hemlock woolly adelgid is present or not.
Please do not clip infested branch samples and transport or mail them. This could accidentally spread the insect to new areas. A state interior quarantine makes it illegal to move hemlock anywhere within or out of Allegan, Ottawa, Muskegon, Oceana or Mason counties. Currently there is no known hemlock woolly adelgid in Benzie County, as a single-tree detection was destroyed. Waste hemlock material in the quarantined counties may be moved to approved disposal sites within the quarantine zone.
For more information on identifying and managing hemlock woolly adelgid, visit Michigan.gov/HWA.
Upcoming invasive species webinars
Contact: Joanne Foreman, 517-284-5814
New sessions of Michigan’s NotMISpecies webinar series will cover how conservation officers help prevent invasive species introductions, as well as ways to enjoy the outdoors while minimizing harmful effects of invasive plants, animals and pests.
Supported by the Michigan Invasive Species program, the monthly, hourlong webinars are designed to keep people informed about available programs, current research and emerging issues in the state and the Great Lakes region. Question and answer sessions and links to resources help attendees get the most out of each presentation.
“Step Aboard” (9 a.m. Thursday, March 24) provides an introduction to Michigan’s Clean Boats, Clean Waters grant program, offering resources to groups interested in aquatic invasive species prevention through increased boater education and awareness. Kelsey Bockleman and Paige Filice from Michigan State University Extension and Kevin Walters from the Michigan Department of Environment, Great Lakes, and Energy will reveal 2022 grant award recipients, share information on past projects and help groups prepare to apply for a grant from the program in 2023.
“New Name, Familiar Pest” (9 a.m. Thursday, April 14) focuses on Lymantria dispar (formerly known as gypsy moth), an invasive pest now considered naturalized in Michigan’s forests. An expert panel including Dr. Deborah McCullough from MSU, Dr. Steven Katovich of the U.S. Department of Agriculture’s Forest Service, Susie Iott of the Michigan Department of Agriculture and Rural Development, and the DNR’s James Wieferich will cover the unusual history of this pest in the United States and here in Michigan, and what you can do to reduce some of the unpleasant impacts of an outbreak. You’ll learn tips to help stressed trees recover from defoliation and options to help reduce the nuisance around your home.
“Clean It Up, Drain It Out, Dry It Off” (9 a.m. Thursday, May 12) will show how easy it is for boaters to adopt the Clean, Drain, Dry process to prevent the spread of aquatic invasive species. Kelsey Bockleman from MSU Extension and Kevin Walters from EGLE will provide a live demonstration of each step in the process. The team will demonstrate watercraft decontamination essentials using basic tools like towels and brushes and display the features and operation of a trailer-mounted mobile boat washing system.
If you are new to the series, it’s easy to catch up on topics including collaborative efforts in invasive carp management, early detection and response for aquatic invasive species, and the threat posed by spotted lanternfly. Recorded versions of all previous NotMISpecies webinars are available at Michigan.gov/EGLEEvents under “Featured Webinar Series.”
Michigan’s Invasive Species Program, a collaborative effort of the departments of Natural Resources; Environment, Great Lakes, and Energy; and Agriculture and Rural Development, coordinates and supports invasive species initiatives across the state and provides support through the Michigan Invasive Species Grant Program.
Time to check trees for hemlock woolly adelgids
Michigan Invasive Species
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