Michael Bowman on Instagram: "This Pre Emergent works harder and better some say. Controls Dallisgrass, POA, and other grassy weeds. I bought mine at Lowe's, contains Dithiopyr. Dithiopyr is great because it pulls double duty as a pre-emergent and a post-emergent (on very young weeds). Here’s why lawn pros and DIYers like it so much: 1. Long Residual Control • It stays active in the soil for up to 3–4 months, giving you season-long protection against weeds like crabgrass, goosegrass, and annual