Landscape Management, Weed Watch 2014
WEEDWATCH STANDING SENTINEL TO PROTECT PLANT HEALTH CONTROL TIPS Glyphosate and ALSresistant For more information regarding these and other turf weeds and related control technologies and tips please visit www DowProvesIt com or call 800 255 3726 BROUGHT TO YOU BY LANDSCAPEMANAGEMENT NET FEBRUARY 2012 28 PHOTOS COURTESY DR SHAWN ASKEW FAR LEFT DR RONALD CALHOUN Recommended Dow AgroSciences solution Gallery specialty herbicide Recommended Dow AgroSciences solution Snapshot specialty herbicide State restrictions on the sale and use of Snapshot apply biotypes of this species have been con rmed in the United States and are spreading across the country As an annual weed that can produce more than 200000 seeds per plant pre emergence herbicides may provide the best option for control and will limit the spread of the resistant biotypes Make a fall and early spring application of an appropriately labeled preemergent herbicide HORSEWEED Conyza canadensis IDENTIFICATION TIPS This low growing freely branched winter annual germinates when temperatures begin to cool This weed reproduces by seed In early spring it begins to grow rapidly forming spine tipped burs in the leaf axis It has opposite sparsely hairy leaves twice divided into narrow segments or lobes Small lowers bloom in the spring Its burs are often hard to see but easily felt CONTROL TIPS Maintain a healthy lawn by fertilizing and mowing at the proper height and frequency Healthy grass can outcompete burweed for light water and nutrients to reduce the level of infestation Once this weed develops its burs it is dif cult to control and may need multiple applications of a post emergent herbicide Apply a labeled preemergence herbicide in the fall before burweed germinates Activate with 05 in of rainfall or irrigation IDENTIFICATION TIPS Also known as marestail this winter or summer annual can reach 6 ft tall Seedlings develop a basal rosette young leaves are egg shaped with toothed margins Mature plants leaves are entirely without petioles They are alternate with entirely or slightly toothed margins White pink or yellow inconspicuous lower heads occur at the top central stem of this proli c seed producer LAWN BURWEED Soliva sessilis
You must have JavaScript enabled to view digital editions.
