Tree Fungicide Injection Technique
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Photos and illustrations - Copyright Chemjet Trading Pty,Ltd, Australia
Once you have prepared the tree by removing 4" to 6" of dirt away from the root flares, proceed with Step1:
STEP 1: Pour the prescribed amount of chemical into tank and add water according to concentration rates set forth on the product label. (eg. 16” dia. tree requires 160 mils chemical for the 10 mil dosage rate - preventive rate ….. and 320 mils of chemical for the 20 mil dosage - therapeutic rate). If there is any possibility of infection even though no visible signs are apparent, use the stronger therapeutic dosage. Attach the hook-up line to the tank and make sure the valve is turned off.
STEP 2: Operate the air pump until the gauge shows 20 to 25 pounds of pressure in the canister If you have an air compressor the air chuck will indicate the desired air pressure. Once, the tank is connected to the tree you will have to periodically monitor the air pressure at the desired level.
STEP3: Drill 5/16 inch holes as close to the ground as possible, slanting slightly upward. Drill until you get white grindings - about 1-1/2 inches to 2 inches (this indicates that you are through the trunk and into the cambium where you need to be for good uptake). If the bark is thick use a hatchet to remove and smooth just enough bark to allow proper penetration of your drill bit. To remove fine sawdust from the hole use a small piece of tubing like a blow tube about 18" to 24" long. Direct one end at the drill portal and then blow on it to remove the excess sawdust.
STEP 4: Insert the tee into the drill portal and gently tap the tee gently with a small hammer in-order to seat the tee into the sap wood.
STEP 5: Drill the next hole 3"- 4" inches from the first hole following the contour of the tree. Drill holes on the flare roots, not in the valleys of the roots. Follow the same procedure around the base of the tree with subsequent holes. It is best to drill 3- 4 holes, inserting the tees as you move around the tree. Loop harness tubing as shown in illustration to avoid airlocks and to break bubbles.
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STEP 7: When treatment is completed, remove harness from tree replacing the dirt back around the tree. Do not fill holes with any compound or foreign material and this will slow the natural healing of the tree.
STEP 8: Practice thorough sanitation in equipment care before moving to next tree to be treated. Wash you lines in a 10% Clorox solution and rinse in clear water.
Check these pages for more information:
Looking for the Root Flares .... http://www.oakwilt.com/rootflare.html
Oak Wilt - The Injection Process http://www.oakwilt.com/injectionprocess.html
DOSAGE: Dosage rates must be in complete compliance with the prodduct label. Visual symptoms of oak wilt do not necessarily occur the first season of infection. In areas with high incidence of disease, all trees have been exposed and a large percentage infected. It is reasonable, therefore, to use the therapeutic dosage for all treatments. Retreatment for infected trees is strongly recommended for the following year.