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Chemjet Tips and Ideas

Tips and Ideas

Here is a list of ideas and tips for successful and cost efficient operation and maintenance of the Chemjet Tree Injector for tree injection treatment.
  1. For tree injection procedure look at the website: chemjettreeinjector.com and find a page that discusses the type of tree affliction you would like to treat. There will be a treatment procedure listed there.
  2. To snap the body and nozzle of Chemjet together, it helps to use your two hands and your two knees pushing on your wrists to snap them together.
  3. To snap the body and nozzle of the Chemjet together you can line up the connecting parts and push straight down on something with a hole in it to protect the nozzle point, like the gap in a picnic table between the boards, or a hole in an overturned plastic milk crate.
  4. If injection liquid leaks past the red rubber washer seal of the Chemjet while inserted into the tree, take the Chemjet apart, remove the rubber washer from the plunger stem, and use water to clean debris and residue off the inside hole and outside rim of the washer and the inside of the nozzle barrel. Reassemble making sure both sides of the Chemjet body are completely snapped into the nozzle.
  5. Don’t twist or pull on the handle of fully discharged Chemjets to pull them out of the tree. This may cause damage resulting in Chemjet leaks and broken parts. Instead grasp the body portion to remove from tree.
  6. Take care of your Chemjet Tree Injectors after the work is done (or during long term work at least once per week) so they keep working smoothly by disassembling, washing all parts with hot soapy water, rinse and air dry, then lubricate the nozzle barrel and rubber plunger washer with silicone lube or vegetable oil before reassembly.

Other Treatments and Info

  1. If the washer sticks and pulls off in the nozzle barrel, pull the washer out with a hooked wire from a coat hanger. Then clean and lube your Chemjets per No. 2. The plungers will likely work fine after this. Pull slowly don’t jerk.
  2. Drill no more than three holes at a time during injection work. Then let the drill bit cool off. A hot drill bit may scorch the wood which will inhibit injection.
  3. Use an 11/64 bit to drill a hole about 1-1/4 inch deep into the tree for injection. Drill where there is a crevice in the bark.
  4. For repeat injection treatments do not use previously drilled holes from a prior injection treatment that is more than a month ago. The tree will heal up and plug the holes which inhibits subsequent use of the same hole. Use newly drilled holes for each injection treatment.
  5. Don’t twist the Chemjets when you put them in or take them out. The tip may break off.
  6. If the Chemjet plunger is sticking (not injecting all the way down, or the plunger washer is pulling off), disassemble and clean with soap and hot water. Then lubricate.
  7. Lube Chemjets while assembled by squirting a small amount of silicone spray lube in the back side (handle side), cycle the plunger a couple of times. 
  8. Lube Chemjets by disassembling, pull out plunger, then smear a small amount of vegetable oil or silicone grease in the nozzle end with your finger tip and reassemble.
  9. Lube Chemjets while assembled by sucking in a small amount of lube oil (like vegetable oil) in the nozzle tip and squirting back out. Cycle the plunger a couple of times to clear excess lube.
  10. Disassemble Chemjets using a metal spoon rather than a screwdriver. It’s easier and safer.
  11. If there is a part of your Chemjet that has failed, you can repair with new parts rather than replace with a new Chemjet. Parts available at chemjettreeinjector.com
  12. If an injection point is taking chemical too slowly or not at all, cock it back and remove, then drill and inject into another hole 12 inches or more above the slow hole. You may have to plug the lower hole if chemical comes back out there.
  13. If the tree is not taking chemical very fast, leave the Chemjets in overnight. Some trees may take a couple of days (depending on the weather and health of tree).
  14. If chemical leaks back out of an injection point, put the Chemjet back in the hole as a plug for another half hour.
  15. Use plugs in the holes if they are leaking so you can use the Chemjet elsewhere. Whittle a point on a twig and tap it into the hole, or use rubber plug or wood plugs available at chemjettreeinjector.com.
  16. If holes are not leaking chemical or sap, you can seal using a dab of 100% silicone caulk as a long lasting plug.
  17. If you have hard water, use distilled water when mixing propiconazole to avoid a precipitate forming which could inhibit injection performance.
  18. Decontaminate Chemjets (inside and out), drill bits and your hands before moving to the next tree to avoid transporting pathogens and infecting other trees. Use Lysol Disinfectant solution or weak bleach solution.
  19. For trees that have multiple trunks (“double or triple” trees), inject around each branched trunk rather around the big main trunk. This will allow better treatment performance.
  20. In hot southern states do not inject during drought conditions. The chemical will not go into the tree very fast and it may hurt the tree, causing all the leaves to fall off. Water the trees or wait for rain before injecting.
  21. If the leaves all fall off a tree due to a treatment error (injecting too much chemical, or during drought), the tree may not be dead so don’t cut it down. The leaves will likely grow back in later months, or in the spring.
  22. If an injector is almost finished but then seems to stop, the plunger washer may be sticking. Give the red handle a gentle push down to get it going again.
  23. The Chemjet holds 20 milliliters in the fully locked back position which is easiest to work with. If you have a treatment that calls for less volume per injection, then you may be able to dilute your chemical mix to allow use of full 20 ml Chemjet capacity for the same dose per injection point.
  24. The Chemjet locks back at 20 ml as shipped. You can customize your Chemjets to use a smaller dose by cutting notches in the plunger stem at the desired lock back interval.
  25. Another way to inject less than 20 ml is to pull chemical into the desired dose volume, then pull air into the remaining volume to lock back.
  26. Drill holes at a downward angle so any air bubbles stay on the top part of the Chemjet.
  27. Color code your Chemjets with paint for different uses.
  28. Drill holes in the bark crevice locations to minimize the thickness of bark you have to drill through.
  29. When drilling the tree, look for light colored wood on the end of the bit. If all the shavings are dark, then it’s a dead spot and not suitable for injecting. Move up or over and drill a new hole.
  30. When injecting pine trees, have the loaded chemjet ready and jam it in the hole and uncock immediately after drilling. This will help avoid pine pitch plugging up the injection hole.

Other Treatments and Info

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