Bamboo, trees, and deep-rooted weeds are notoriously difficult to eradicate because they possess an extensive underground rhizome system. Ordinary low-concentration herbicides (typically only 10%–20% active ingredients) may cause temporary leaf yellowing, but the roots remain completely unaffected. Mature bamboo roots have an extremely thick cuticle layer, and the underground rhizomes store massive energy reserves. When exposed to low-concentration herbicides, the plant can even activate internal “detox enzymes” to break down the toxins or simply close its stomata to block absorption. The result? You exhaust yourself, while the plant thrives.