Contacts & Sources
For questions and advice about hemlocks, the woolly adelgid and how to recognize it, treatment options, instructions for treating your trees, or other related concerns, please call the Hemlock Help Line 706-429-8010.
Property owner associations and other organizations may also call the Hemlock Help Line 706-429-8010 to set up a group presentation, planning for your hemlock preservation project, or special training for volunteers to treat your trees.
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Sources for Treatment Products
Recommended Products -- For lightly to moderately infested hemlocks, Imidacloprid 75% WSP or 22.6% 2F (sold under various brand names) is the recommended treatment. For heavily infested or very large infested hemlocks, a different product containing Dinotefuran (sold as Safari 20 SG or Transtect 70WSP) is recommended. In addition to these primary products, there are other consumer products that do-it-yourselfers may consider. Click below for:
Retail Sources for Property Owners -- HWA treatment products are available from many sources, including the Internet. Below is a partial list of local retailers that carry them; this list by city is meant for information purposes only, not as a company endorsement. The GA Forestry Commission’s web site also has a list of insecticide vendors. If you know of other retailers that should be added to the list, please let us know.
We suggest you call ahead to be sure the product you want is in stock; if it isn't, you may request the company to order the product for you. And if you will need a substantial quantity of treatment product, it's a good idea to call more than one supplier to compare products, prices, and any available volume discounts before making your choice. If you need advice or have questions on the most appropriate treatment product to use for special circumstances, the quantity needed, product characteristics, etc., please call the Hemlock Help Line 706-429-8010.
I = Imidacloprid products, D = Dinotefuran (Safari 20 SG)
Special Notes to Property Owners -- Merit 75% WSP is Bayer's original Imidacloprid product for treating HWA. However, there are quite a few generic formulations in liquid or powdered form that are chemically equivalent, equally effective, and much less expensive. When you call to order Imidacloprid, specify that you want a "generic product containing at least 21% Imidacloprid for treating hemlock woolly adelgids." Then the store will be able to tell you the appropriate product to buy. See the Chemical Controls page for a list of products.
Safari 20 SG is a water-soluble granule containing Dinotefuran and is packaged in either a 12-ounce or 3-pound container. It comes with a specially marked measuring cup to use for measuring the product. Transtect 70 WSP is a similar water-soluble powder and is packed in a canister containing twenty 0.6-ounce packets, but it's difficult to find in the southeast. There is currently no generic version of these products.
Wholesale Sources for Professionals and Retailers -- We want to encourage as many retailers as possible to carry HWA treatment products in the hope that if property owners can find them locally, they will save more hemlocks. Therefore, to make it easier for retailers to find wholesalers that sell the appropriate products, we've developed a partial list of insecticide wholesalers for the southeastern market. This alphabetical list is meant for information purposes only, not as a company endorsement. If you know of other wholesalers that should be added to the list, please let us know.
Sources for Soil Injectors
Borrowing -- Once you have acquired the necessary treatment product, you may call one of the locations listed below and request to borrow a soil injector. In addition, quite a few neighborhood associations (a few of which are listed here) have purchased injectors for lending to residents. There is no fee for borrowing an injector from the Georgia Forestry Commission or UGA Extension Service, but a refundable deposit may be required; neighborhood associations may have their own requirements.
Note: The kind of soil injectors available from each borrowing location may vary: handheld Kioritz, backpack 1-Two Root Injector, or handheld EZ-Ject Lite. The mixing and dosing instructions for each of these units are DIFFERENT, so please look carefully at the title of the instructions you choose or call the Hemlock Help Line to be sure you're using the right ones.
Purchasing -- The Kioritz soil injector is no longer being manufactured and is unavailable for purchase, so if you have one or use one, please take good care of it. See Maintaining a Kioritz Soil Injector. If you have a Kioritz soil injector that needs service or know of one that's not being used (even if it's broken, please call the Hemlock Help Line 706-429-8010.
Here is information on two alternative handheld devices that are available for purchase:
The 1-Two Root Injector from Nu-Arbor is being marketed as a replacement for the Kioritz, although it is quite different. It consists of a 4-gallon back-pack tank connected by a hose to a metal injection probe with fixed calibration and is available from the companies listed below and possibly other sources on the Internet. Click here for more information about the Nu-Arbor injector. You can also read an evaluation prepared by Bob Pledger outlining his personal findings on its performance treating hemlocks in landscape and forested settings.
NEW -- The EZ-Ject Lite soil injector is now available. It is a handheld device similar in size, weight, and operation to the Kioritz many of you are familiar with. The key differences are a 1-gallon tank (compared to 3 qts.), fixed output of either 1/2 or 1/4 oz. per pump (compared to 1/6 oz.), and a sturdy foot pedal for pushing the probe into the soil. Click here for a features flyer.
EZ-Ject Lite weighs only 8.5 pounds and has a narrow stirrup-shaped handle, making it easy to get close to the base of the tree. It has a cylinder lock that prevents the unit from dispensing liquid if you need to use the handle to push it into the ground or use it as a “walking stick” on steep hills.
Orders can be placed through various Internet sources or directly through the manufacturer. When ordering, please specify EZ-Ject Lite and the desired output (we recommend 1/4 oz. per pump).
For information on the product, visit EZ-Ject, Inc.,
Repairing/Refurbishing -- SGH has developed a repair capability for the Kioritz soil injector. If you have one that is broken, missing parts, or not working properly (i.e., putting out less than 2 ounces of fluid for 12 pumps of the handle), please call the Hemlock Help Line 706-429-8010. We have replacement or remanufactured parts and can usually restore them to proper function. The service is free; the only cost is for parts used and return shipping.
Other Equipment -- Hand-pump, back-pack, or sled-style sprayers may be found at retailers such as Home Depot, Lowe's, Site One Landscaping Supply, Tractor Supply, or your local farm co-op or hardware store.
All product and source names mentioned above are meant for informational purposes only, not as product or company endorsements.
Qualified Professionals Specializing in Hemlocks
If you want to contract with a professional to treat your hemlocks, here are the qualifications that we recommend you should look for:
■ License -- has a current contractor's pesticide applicator license listed on the Georgia Department of Agriculture's web site (agr.georgia.gov/pesticide-contractors.aspx) in the appropriate categories (23 Forest Pest Control and/or 24 Ornamental and Turf Pest Control);
n Insurance -- has the liability insurance required by the State of Georgia;
n Expertise -- is experienced in treating hemlocks using best practices and offers application methods other than trunk injection;
n Availability -- covers all or part of north Georgia; and
n Service -- provides good customer service at reasonable rates.
Here are some local companies that we know meet the above qualifications. These and other licensed HWA Pesticide Applicators are also listed on the Georgia Forestry Commission's web site. We suggest that you call more than one company to compare services and prices before making your choice.
To find a properly licensed pesticide applicator in Tennessee -- Go to the Tennessee Department of Agriculture web site https://agriculture.tn.gov/listcharter.asp, enter one of the search categories, and look for companies that have a HLT (Horticulture Lawn & Turf) and/or FPC (Forest Pest Control) charter. Then you'll need to call them to verify that they actually treat hemlocks and that they offer a treatment other than stem injection.
To find a properly licensed pesticide applicator in North Carolina -- Go to the North Carolina Department of Agriculture web site https://apps.ncagr.gov/LicenseSearch/Home/Search/026, where you can search for a Commercial Pesticide Applicator in your area with a license in either Forestry or Turf & Ornamental Pest Control. Then you'll need to call them to verify that they actually treat hemlocks and that they offer a treatment other than stem injection.
To find a properly licensed pesticide applicator in other states -- Contact the state's Department of Agriculture Pesticide Division and ask how to find a list of qualified pesticide applicators who treat hemlocks for the woolly adelgid in either a residential or forest setting.
Hemlocks are wonderful in a landscape or woodland setting and can enhance the beauty and value of your property. They can be used as Christmas trees and then planted outdoors, make thoughtful gifts to commemorate special events, and offer valuable lessons in nature and stewardship for the children in your life. Each hemlock that is adopted, planted, and cared for is important to the preservation of the species. And if you adopt hemlocks through Save Georgia's Hemlocks, you'll also be supporting our efforts to help more property owners save their hemlocks, plus all or part of your donation will be tax-deductible.
Below is a partial list of sources that may have hemlocks. It is meant for information purposes only, not as a company endorsement. If you know of other good sources of clean healthy hemlocks, please let us know.
As part of our educational and charitable service initiatives, we also give away hemlock seedlings to schools, churches, and other nonprofit organizations. We are particularly interested in finding groups willing to undertake hemlock growing projects and will supply the starter seedlings and training free of charge. Please call the Hemlock Help Line 706-429-8010 for more information.
Save Georgia's Hemlocks has no business connections with any of the chemical vendors, equipment dealers, professional pesticide applicators, or tree sources listed or linked above, except:
of the professional pesticide applicators listed above and on the Georgia Forestry Commission's web site, Mark
Shearer dba Hemlock Doctor, is a relative of a Save Georgia's Hemlocks
He operates his business completely separately from the SGH Hemlock Help
Program; there is no information sharing and no financial benefit involved.
© Save Georgia's Hemlocks