Dustin nods and his hand does the same - a sort of quick, bobbing gesture before getting to his response.

[Then maybe this will help,] he suggests. [I have enough here to test on a small area of plants, or a single small tree. The effects are usually immediately observable. If it helps to stabilize the calcified leaves on the test tree, I could increase production and start treating the rest of this location.]

Would save him a lot of bother, too - having to go the route of total eradication or dissolving the tree's stone leaves before they fall would take a lot more research, effort, and time.