Retail Sources for Property Owners                    Wholesale Sources for Professionals & Retailers

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 Application Devices

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 Kioritz Soil Injector Maintenance, Testing & Adjusting..  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.  See Nu-Arbor Injector Maintenance, Testing & Adjusting.  Also see https://www.treestuff.com/content/pdf/1TwoInstructions.pdf. Nu-Arbor, https://www.nu-arbor.com/1-two-root-injector, 888-773-8777 Rittenhouse, https://www.mkrittenhouse.com/us/tree-root-injector, 800-461-1041

The EZject Lite soil injector 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. for the Kioritz), fixed output of either 1/2 or 1/4 oz. per pump (compared to  an adjustable output for the Kioritz), and a sturdy foot pedal for pushing the probe into the soil.  Click here for a features flyer. EZject 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 is available with 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 an injector to treat hemlocks, please specify EZject Lite, Model S2B with an output of 1/4 oz. per pump). For information on the product, visit EZject, Inc., https://www.arborsystems.com/?s=EZ-ject+soil+injector. To find a distributor for the product, visit https://www.arborsystems.com/ez-ject/ez-ject-lance-distributors/. Sources for EZject Lite 1/4 oz output:   https://www.forestrydistributing.com/ez-ject-soil-injector-arbor-systems, (303) 747-6414                                                                         or https://www.arborsystems.com/ez-ject/, (888) 395-6732

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.