As summer is winding down, the troublesome summer annual weed crabgrass can rear its ugly head late in the season. A pre-emergent herbicide applied early in spring is the best way to prevent crabgrass from even germinating. So if one was not applied properly earlier this season, expect crabgrass, often in large amounts. Crabgrass is a lighter pale green grassy weed that can form a dense mat in the turf, chocking out desirable turf. During rainy seasons or with excess irrigation, even lawns treated with pre-emergent can experience little clumps of crabgrass weeds in places, especially in thin turf, as constant rains and saturated soils will cause the product to break down sooner.
Once crabgrass is up and growing, it can be sprayed with a liquid post-emergent herbicide, which we provide with our summer and early fall lawn treatments. Up until a few years ago, a product named MSMA was used, and did a good job of control. However, MSMA has been taken off the market and we no longer can legally use it, which we will not. This product also controlled Dallisgrass, which has lead us to look to other methods that are more expensive and less effective compared to using MSMA. So now we use a product called Quinchlorac, which does a fair to good job of killing crabgrass which is up and growing.
We find that our 6 and 7-Step customers, who received our R3 Echelon treatment in mid to late spring, have much better control of crabgrass in their lawns. Echelon has a booster rate of Barricade pre-emergent included in it, so this helps to supplement the earlier R1 treatment. So consider upgrading your program service level if you are not currently on our best 6 or 7-Step programs.