Basal Drench Application

Step 1 – Inspect the Tree and Soil

• If the tree has severe trunk injury or significant girdling roots do not treat.
• If the soil is saturated with water, wait until it dries out before application.

Step 2 – Determine Dosage

• Accurately identify the species. Determine the Rate Category A – F.
• Measure the size using a DBH tape or a standard tape measure. If using a standard tape measure, divide the total inches by 3.14.
• Find your application volume on the Individual Dose Rate Card for that category and plant size.
• Make adjustment based on crown size (see dosing considerations).
• Write down the dosage.

Step 3 – Excavate Trench Around Base of the Tree

• Excavate a small trench that is a minimum of 4 inches deep and 3 inches wide.
• Go deeper if there is a potential of Cambistat solution moving to other plants.
• Go deeper if the soil is a heavy clay or is compacted.
• Keep the excavated soil on the outside of the trench.

Step 4 – Mix and Pour Cambistat Solution Evenly into Trench

• Use your graduated cylinder to measure out the exact amount of Cambistat solution you will need.
• Transfer the Cambistat solution to your application container.
• Apply the Cambistat evenly around the whole tree – be sure not to pour too fast.
• After the Cambistat has been completely absorbed into the soil,
  fill and firmly pack soil down in trench to prevent run off.

Step 5 – Record and Keep Application Information

Keep a record of the following information:

1. Tree species
2. Tree size
3. Dosage used – include any additives and water amount
4. Any noticeable tree issues or problems
5. Soil type and condition – ex. compacted, wet, dry, etc...
6. Tag the tree with basic application information
7. Tree location, consider GPS