Have you tried DE aka Diatomaceous Earth or a soap solution?
For the soap solution:
A quart of warm water, and one teaspoon of dish soap, mix and put in a spray bottle.
Invasive plants are Earth's way of insisting we notice her medicines. Stephen Herrod Buhner
Everyone learns what works by learning what doesn't work. Stephen Herrod Buhner
If you live in a cold climate and on the grid, incandescent light can use less energy than LED. Tiny ad:
It's like being on a deserted island - only with gardens and natural buildings in Montana