Imidacloprid Bayer Advanced Garden™ May to Tree and Shrub Insect early JuneControl

Acephate ACECAP® 97 Systemic MayInsecticide Tree Implants

Bonide® Systemic Insecticide Bullets

Treatment OptionsInsecticide productsavailable for home useare Bayer AdvancedGarden™ Tree andShrub Insect Control,Bonide® SystemicInsecticide Bullets andACECAP® 97 SystemicInsecticide TreeImplants. Caution: readall label instructionsbefore using any pesti-cide, avoid skin contact,and store pesticideswhere children cannot reach them.

MICHIGAN STATEU N I V E R S I T Y

EXTENSION

Several insecticide products are available to homeownersfor control of emerald ash borer (EAB). Treatments areneeded every year to protect trees from EAB. Treatmentsare recommended only for homeowners in the quarantinedarea; it is not necessary to treat ash trees outside of thisarea. Treatments may be more effective if overall treehealth is maintained. Therefore, it is important to fertilizetrees in the fall or spring and water regularly.

Dave C

appaert, MSU

Emerald ash borer adult

Treatment ConsiderationsBecause of the expense ofyearly treatments, it isimportant to weigh thedecision to treat carefully.Consider the value of thetree in relation to treatmentcosts. Also consider thehealth of the tree. Researchsuggests that insecticidetreatments may be able tosave infested trees exhibit-ing low to moderatedieback (20 to 40 percent),but the outcome is less certain than with healthy treesshowing little or no sign of infestation.

Healthy ash tree: no dieback. Ash tree exhibiting 40 percentdieback.

Eric Rebek, MSU

E x t e n s i o n B u l l e t i n E - 2 9 5 5 N e w J a n u a r y 2 0 0 6

EmeraldAsh Borer

Soil drench

Mix with water and drencharound base of tree

Trunk implant

Follow directions fordrilling holes and correctplacement of implants orbullets

Active Product Timing Type of application ingredient and instructions

Homeowner Guide toEmerald Ash Borer Treatments

H o m e o w n e r G u i d e t o E m e r a l d A s h B o r e r Tr e a t m e n t s

MSU is an affirmative-action, equal-opportunity institution. Michigan State University Extension programs and materials are open to all without regard to race, color,national origin, gender, religion, age, disability, political beliefs, sexual orientation, marital status, or family status. • Issued in furtherance of Extension work in agricul-ture and home economics, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Thomas G. Coon, Extension director, MichiganState University, E. Lansing, MI 48824. • This information is for educational purposes only. References to commercial products or trade names do not imply endorse-ment by MSU Extension or bias against those not mentioned. This bulletin becomes public property upon publication and may be printed verbatim with credit toMSU. Reprinting cannot be used to endorse or advertise a commercial product or company. Revised - 1:06 - 5M - KMF

MICHIGAN STATEU N I V E R S I T Y

EXTENSION

Product DescriptionsBayer Advanced Garden™ Tree and Shrub InsectControl is a systemic insecticide applied as a soildrench around the base of a tree. There are severalBayer Advanced Garden™ products — be sure to pur-chase the one with “Tree and Shrub” in large print onthe label and imidacloprid as the active ingredient.Label instructions say to use 1 ounce of the insecticidefor every inch of distance around the tree trunk (cir-cumference). Applications should be made in May orearly June. This product is available at most local hard-ware and garden stores. More information about theproduct is available at www.bayeradvanced.com.

Bonide® Systemic Insecticide Bullets and ACECAP®97 Systemic Insecticide Tree Implants are similar prod-ucts, both containing acephate as the active ingredi-ent. The insecticide is delivered through small car-tridges implanted at 4-inch intervals around the trunkbase. Follow label directions for drilling holes andinserting implants or bullets. Both products should beapplied in late May, during the period of maximumupward flow of tree sap. ACECAP® 97 is availablethrough authorized dealers (http://www.treecareproducts.com); Bonide® Bullets are available throughhardware and garden stores. For more information onthis product, see the company web site at:http://www.bonideproducts.com

Treatment Recommendations• Small trees — trunk diameter of 3 inches or less —

should be treated using only Bayer AdvancedGarden™ Tree and Shrub Insect Control.

• Trees with a trunk diameter between 3 and 6 inchesshould be treated with either Bayer AdvancedGarden™ Tree and Shrub Insect Control or the ACE-CAP® 97 implants or Bonide® Bullets.

• Larger trees — trunk diameter greater than 6 inches— should be treated with both ACECAP® 97implants or Bonide® Bullets and Bayer AdvancedGarden™ Tree and Shrub Insect Control for the first1 to 2 years. In subsequent years, use implants nomore often than every other year to avoid possibletrunk trauma from the implant holes.

• Note: Homeowners may also contact tree care pro-fessionals to treat their trees. Professionals haveaccess to some products that are not available tohomeowners. Michigan State University does notendorse the insecticide products discussed in thebulletin over other options. These products arediscussed because they have been evaluated inMSU research tests on emerald ash borer.

Authors: Kimberly A. Rebek and David R. Smitley Michigan State University

For more information visit: www.emeraldashborer.info

Eric Rebek, MSU

Application of soil drench around tree base. Proper insertion of implant just below cambium surface.

Courtesy of C

reative Sales, Inc.