Question

Questions:Does Drive 75 have any effect on crabgrass seeds if sprayed around the time the plant has gone to seed? - Rob, Knott., RI

Answer

Everyone has questions. And BASF Professional Turf has answers.

Drive does have some residual activity and will control crabgrass that germinates from seed for about 3 weeks or so. However, crabgrass seed that is present during the summer is a result of last year's plants maturing and going to seed. If you were to spray plants now that have gone to seed, Drive would not have any effect on that seed because it will not usually try to germinate until the next season. Remember also that preemergents and products like Drive, do not control the seed, they control germinating seedlings (the herbicide is absorbed by the root system as the crabgrass germinates). I hope that helps.