The picture above of the Chemjet® injectors were purchased from: www.chemjetus.comand being used by the University of California, California Agriculture, Forestry Lab to inject Potassium Phosphate fungicide K2HP03 into oak trees to help prevent infection with the Sudden Oak Death caused by the pathogen Phytophthora ramorum . The Chemjet® injectors work equally well for the injection of Insecticides, Fungicides and Nutrients.
TREE INJECTOR SYSTEMA simple, hand-held, plastic liquid injector for trees bears a likeness to an overgrown syringe and works on much the same principle. The system is said to be a cost efficient method for injecting insecticides, fungicides, fertilizers, and trace elements into any limb or trunk of 2 in. diameter or greater. After an injector has been filled by submerging its tip in solution and pulling up on the spring-loaded "T" handle which is then twist locked, it is ready to be tightly inserted into a pre-drilled hole and unlocked. The internal spring then applies steady pressure delivering the injector's contents, usually in 3 to 5 hours depending on weather and sap viscosity. Once empty, The Chemjet® injectors with their bright red handles are easily seen, quickly retrieved, cleaned, and ready for use again. EQUIPMENT •Chemjet®syringeinjectors•Chisel(onlyneededforlargebarkfurrows)•Cordlessdrillwitha11/16’ora4.2mmhighspeeddrillbit•Kestrel®,Propiconazole14.3%MEC•2½gallonbucketforloading&carryingsyringesPREPARATION•If using the preventative 10 mil dosage rate -Dilute 1 part Kestrel® with 1 part water and fill the syringe with 20 mils of the solution.
SAFETY:Propiconazoletastenasty.Itwillstingeyesandcuts,butcausesnopermanentdamageifrinsedimmediately. Follow the label directions. It may irritate sensitive skin, so wear elbow length PVC gloves, safety glasses and old clothes when injecting. •••Take care when using sharp equipment such as drills and chisels. TIMING:Injectionismosteffectiveinspring,summer&autumn,onwarm,sunnymornings.Earlymorningistheideal time as the trees will shut down to conserve water around 11:30 to noon time. You may also inject your trees in early evening around 7 pm when it begins to cool down. Avoid injecting on days over 100°F. Propiconazole has a two year residual and it is recommended to repeat a follow up treatment approximately 22-24 month later. If your trees are infected with early sighs and survives the first treatment, it is recommended to retreat in a years time. Preventativetreatments,beforeinfectionhasoccurred,hasbeenfoundtobemoreeffectivethancurativetreatments.Step 1CarefullyloadtheChemjet®syringesfromabucketthatcontainsthediluted50/50water-Kestrel®(Propiconazole MEC 14.3%) solution. Immerse the tip of the syringe in the solution and pull the plunger back slowly to minimizeanyairbubblesforminginthesyringe.Twisttheplunger1/4turntoleavesyringeintheLockedposition.Note: The Syringes should not be preloaded and placed in the lock position for an extended period of time. The extended time period and spring force may damage the lock position slot. It is best to use the product filled syringes inaminimumtimefollowingpreloading.Step 2Wheninjecting,ifthebarkfurrowsaredeep,removeonlyenoughofouterbarktogetagoodsealwiththesyringe. A chisel can be used, however this is not broadly recommended as it can cause unsightly scars in the bark forashorttimeuntiltheyweatherawhile.Ifusingachiselbecarefulnottogodeeperthanthebarktissue.
Step 3Drillaholeintothetreetrunk.Injectionneedstobeintothesapwood,sodon'tdrillanydeeper than 1 1/4 ” inch and on a downward 45 degree angle. Drill the hole 4 to 6 inches above the trunk flare or if your knees and health dictate, you can drill at knee height so that it is comfortable to inject, and remember the slight downward angle. Do not inject trees under 2 ½” diameter Note: The syringe will penetrate the sap wood only about1/2inchforaproperseal.The screw thread effect on the nozzle is for strength and does not need to be inserted into the tree.Ifweeping occurs, with the open palm of your hand, apply a gentle, but firm nudge to seat the syringe a little deeperintothesapwood.Step 4Drillaholeevery3inchesequidistanceapartaroundthetrunkflare(thisisalmostonehandwidth).Multistemmedtreesneedholesineachtrunk.Step 5AsYouinsertsyringenozzleintothedrilledholeavoidinganytwistingtopreventdamagetothesyringetip.Youwillnotneedtotheusethethreadatthetopofthesyringetip(It is to provide strength to the nozzle).Gently push the syringe tip into the hole to get a good seal. The Injector will seat within a 1/2 inch into the xylem or sap wood. Release the plunger from the cocked position. As mentioned above, you may have to give the red plunger handle a gentlenudgewiththeopenpalmofyourhandtohelpgetabetterseal.Step 6Underidealconditionsthesyringesshouldbefinishedinjectingin3-5hours.Notethattreescanvaryonthe time taken to be injected depending on the tree's health, time of day and weather and soil conditions. You may have to leave the syringe over night. If significant leakage occurs try injecting into another hole or delay injection to another day. RemovesyringesoncealltheKestrel®(Propiconazole)hasbeeninjected.Step 7Countthesyringesbeforeusetoensurethatnonearelostwhileinjecting.Afterusecleanthesyringeswithwarm soapy water, (above 95 degrees F) rinse in clean water. A regular application of silicon spray inside the syringe's chamber will ensure they will inject smoothly. Syringes should be disassembled at least once a season and cleaned usingthemanufacturersinstructions.
TheDon't'sandsomelittleTipsDo not drill more than three drill holes at a time, a hot drill can burn the surrounding wood tissue. and uptake will not happen. Also you can better keep track of the holes as they are small and can be difficult to locate. So, do only a few holes at a time and keepyourdrillcool!Donotplacethesyringestooclosetogether,thismaycausephytotoxicity(leaves turning yellow )maintainthe 3 inch spacing.If the syringes is not totally empty, you may drill another hole above the existing hole or just leave it for a night or two.The uptake on the Sunny Side of the tree will be much faster than the shaded side. A cool breeze will also promote a faster uptakeandthesamefollowingagoodarain.NOTE:Therootflareisbelowthesoillineandthetrunkflareisabovethesoilline.MOSTIMPORTANT....DONOTinjectatreeunderdroughtconditions,makesureyouwateryourtreesthoroughlythedaybeforeinjection.PropiconazoleunderdroughtconditionswillZAPyourtreeasitcauses( phytotoxicity burning and yellowing of leaves and possible eventual death )
MOREINFORMATIONABOUTTHECHEMJETSThe Chemjet®TreeInjectors,deliversthesameprescribedvolumeofthefungicide(Propiconazole14.3%MEC)atthepreventive rate of 10 mils per diameter inch, in a 50% concentrated solution measured at 20 mils per injector. Each injectorplaced3"apartaroundthetrunkstem4-6inchesabovethetrunkflare.The Chemjet®procedurewiththehigherconcentrationismuchlikeaboostershotofanantibioticonlywithfarmoreeffective results. The aim of tree injection is to use the tree's natural transport system which uses the water within the tree for dilution to distribute pesticides, fungicides and fertilizers throughout the entire tree to the areas where they are mosteffective.The Chemjet® Tree Injectors, are far less invasive and the wound closure, due to the small shallow holes will close within afewshortweeks.Theoveralldamageisreducedbymorethat85%versustheMacrosystem.Following the MACRO injection, the dirt is replaced and fills the drill portals subjecting the tree to more peril. This delays woundclosureandoftencausescankerorpathogenicinfectionsintherootflare.Excessive damageto this most critical transition area of the root flares, limits the water and nutrient movement to and fromtherootsandcancauseseriouslossofvigororeventualdeath.See drill size comparison of the chemjet 11/64" to the macro 5/16" drill size -Chemjet drill size: 11/64" = O which is half the size of Macro drillsize: 5/16" = O
The MACRO injectionrequiresafargreaternumberofinjectors,duetothelargerexposedareaofrootflarearea. (A rule of thumb: ... 3 drill portals for each diameter inch e.g 16" dia tree equates to 48 drill portal). ( See photos below ) The Chemjet® injectors delivers far better results, with only 16 small drill portals at a lesser cost to the tree with smaller drill damage, faster wound closure, very efficient uptake, less intensive labor, and best of all yourjobisoutofthedirtprovidingtheleastchanceofpathogenicinfection........AllinAll........Yourtreewins!!
TO ORDER KESTREL® by the Case 4 x 1 gal jugs :Phoenix Environmental Care, P.O. Box 370, Valdosta, GA 31603-0370 www.phoenixenvcare.com Toll: 1.888.241.8845
THE MACRO INJECTION
The flare roots are exposed 4-6 inches below the soil level, the injectors and harness are installed and connected to the pressurized reservoir tank, as the injection begins, taking 6 to 24 hours for completion.For a 16 inch diameter tree it is necessarey to drill 3 times the diameter or 48 drill holes. After removal of the equipment, the dirt is replaced around the root flares, filling the drill portals with dirt and debris. This will cause serious canker and, microbial infections to the cambium and sap wood tissue. We are trying to save the tree from one disease and by doing the job in the dirt, we inflict more serious problems than we can possibly imagine. .... DO IT IN THE DIRT ... Out of SIGHT ... Out of MIND.... You maybe without one TREE !!!!!!!THE MICRO INJECTION
The Injectors are placed 3" apart around the tree at knee high ( 0ne injector for each diameter inch ) For a 16inch diamerer tree just 16 small drill holes. Uptake is within 3-5 hours, relitive to humidity, air temperature, wind conditions, soil moisture and the health condition of the tree. If necessary leave the injectors over night. The job is out of the dirt, avoiding soil borne microbial and canker infections. Wound closure is within 3-5 weeks due to the smaller drill portals of11/64", which is half the size of the required macro-injection drill portals. Result.... Less Labour... Less Invasive Damage........ A Healthier, A Happier, CHEMJET TREE !!!
WoundClosureThere are very good research studies on wound closure. Small, shallow holes should be enough to allow us to inject the needed amount of product into the tree and cause the least amount of damage. A tree in good general healthy condition, these very small shallow wounds ( 4.2 mm or 11/64" drill portal ) created in the drilling process close very readily and will healwithinweeks.Oakstreesgenerallyhaveahigherrateofwoundclosure.