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How much Roundup do I need to kill a tree stump or bamboo?

Concentrate  Advance Roundup Weedkiller - Directions for killing trees:
Stem Injection Method:  Drill holes or make cuts to penetrate sap wood at 450 angle every 10 cm around trunk. Inject 1 ml of undiluted solution into each hole or cut. Application: anytime trees are actively growing.
Cut-Stump Method for trees: Cut tree close to the ground and immediately wet the cut surface using spray, swab, or paint brush. Rate of application - one part Roundup Concentrate plus six parts water.
Cut-Stump Method for bamboo: Cut back to 20cm, pour mixture (one part Roundup Concentrate plus six parts water) down hollow stem or wet cut surface.

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