- Many 800WP is a post-emergence herbicide for "grass that has only grown 2-3 leaves". The drug acts on grass sprouts, grass leaves and grass roots, causing the grass plants to be unable to synthesize amino acids.
- Many 800WP can eliminate many groups of grasses such as: Just grass, squid grass, duckweed, cage grass, betel grass..., broad-leaved grass such as: amaranth, purslane... on pineapples (pineapple, pineapple), sugarcane, corn...