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1-3 cc of Milestone will kill any tree. Roots and all. Drill a hole into the trunk or stump and inject using a syringe (no needle required). You won't find it at HD or the Walmart garden center. I think they have it at BEI, or you can get it on Amazon with free shipping. It's expensive. But quick and final.
Here's a youtube on how to use it to kill giant albizia trees.
http://www.youtube.com/watch?v=HDbzSVwH5-A
Need to add, this stuff works so well because it's toxic. Don't mulch the dead trees and put into your garden. Treat it like hazmat. They say its safe for spraying where animals graze but don't believe it.
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Thanks for the tip about Milestone. I'm going to look into it. The typical tank mix we use for the garden paths and beds is glyphosate and oxyflurofen under the Goal tradename. It has several values for us. First of all it has both pre and post emergence capability. Second, it's a foliar contact herbicide, not a systemic so we feel more confident spraying weeds closer to the valuable plants. It is very effective on broadleaf weeds and keeps their seedlings down for at least a couple of months. Interestingly, Goal is also labeled for many commercial crops in Hawai'i including coffee, cacao, citrus (nonbearing), papaya, guava(!) and taro (dryland), possibly because it is a non-systemic.
We have a constant influx of weed seed from the many neglected or abandoned properties around here. Since the area had many relatively large sugar cane fields, there are many open fields where the fastest growing and most tenacious broadleaf weeds flourish. We also have a lot of inherited california grass and honohono "grass" that the glyphosate/Goal mix effectively kills. Remedy also works very well on honohono and maile pilau (the "vine" or Paederia scandens).
That video link that terracore provided is excellent info and might I add it can be applied to all trees. I will experiment with the machete slash as I've always only drilled holes. Here are some of suggestions that have worked for me.
1. You don't need a costly injection device. Cheap squeeze bottle works well enough -- something like an empty honey bear bottle or the dollar spray bottle with nozzle set at "stream".
2. I have mixed water with the triclopyr as much as 3:1. I am talking about trees max 20 inches in diameter. Don't know if that would be strong enough for giant albezias.
3. I like to followup (especially African Tulip) 2-3 weeks later with a second treatment. But make sure you make new fresh holes.
4. A 1/2 inch Irwin augur bit allows you to drill and "clean out" the hole better than a simple drill bit.
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I've used the Milestone on at least 3 different tree species and the result is always the same. Dead tree, dead roots, and no suckers coming up later. I've never used the machete method because I'm too afraid a strong rain may come later and my theory is the smaller the introduced site the less chance of the product getting rinsed away. I agree that no special injection device is needed. I use an old vaccination syringe with no needle because it's easy to deliver a measured dosage. I've never played around with the dosage because one bottle of Milestone seems to be a lifetime supply, but 3 cc has killed even the big trees with only one treatment.
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Pls share more info like this.
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I just was out cutting into some straw. guava yesterday and pouring some crossbow into the cuts. I did a poor job and much of it ran down the trunks. These trees are also directly next to Ohia that I want to keep so I am hoping for the best. Will report back. I probably was using between 3-5cc's per tree.
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Where can you get Milestone locally?
"From knowledge comes understanding"
"From knowledge comes understanding"
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I am not terribly impressed with crossbow so far. Will also be looking to buy milestone.
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Picked up a quart of Milestone yesterday at Crop Production Services for $91.
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OMG. 91 dollars. I think I paid 25 for my crossbow. I actually went out there today to assess how well it worked again, and the trees are now looking much deader- so possibly it just takes awhile to really see the results. I had to be very careful because I was practically on top of Ohia trees I want to keep. They still look good. Thanks for the info.
