P&PDL Picture of the Week for
October 15, 2007

Now is Prime Time for Broadleaf Weed Applications in Many Turf Areas

Glenn Hardebeck, Turfgrass Research Agronomist, Department of Agronomy, Purdue University

With the recent change in weather we seem to be returning to a “typical” October pattern.  For most turfgrass areas across Indiana, October is the best month for broadleaf weed applications.  Applications can be very effective as late as mid November.  While you may not see activity (burning and curling of the weeds) as quickly as you might in late spring, the improved control will be evident next spring with fewer broadleaf weeds flowering in their full glory.  Fall applications are much more likely to kill the entire plant rather than merely burning the top growth down without killing the root system of the weed.  Remember to fertilize throughout the fall to encourage the turf to fill in the voids due to summer heat and/or fall weed control.  More information on broadleaf weed control can be found at http://www.agry.purdue.edu/turf/pubs/ay-9.pdf


Click image to enlarge

Broadleaf weed

Common plantain is among many broadleaf weeds that may be currently present in turf areas.

Purdue Plant & Pest Diagnostic Lab Purdue Cooperative Extension Service