Paspalum, Thin (Bull Paspalum)
[Paspalum setaceum Michx.]
(bull) paspalum is common in sandy soils in disturbed, open areas throughout
the Coastal plain region. Dallisgrass, field paspalum, and thin paspalum
resemble each other, and thin paspalum is often mistakenly called dallisgrass.
Thin paspalum has a glossier, more shiny leaf when young than dallisgrass.
Dallisgrass leaf appearance is very similar to crabgrass, which is a dull green
Seedhead / Flower
raceme; 1-6 spikelets per stalk
small, membranous w/ fringe of hairs on top
Growth Season / Life Cycle
Leaf Blade Tip Shape
sharp-pointed; hairy to almost smooth; wavy edges
Leaf Blade Width
open; there is a fringe of hair along the margin of the sheath
Note: Still not
sure this is the right weed? The Turf
& Weed Identification Decision Aid may help. Check the TurfFiles glossary for definitions
of unfamiliar terms.
grass weeds are not desirable as turfgrass species under any conditions.
Therefore, every effort should be made to prevent these weedy grasses from
becoming established in turf, as selective control measures are usually
difficult. Selection of adapted turfgrass species and cultivars and the use of
cultural practices are important in minimizing weedy grass encroachment and
competition. Management practices include (1) mowing at the recommended height
for the selected turfgrass and removing clippings when seedheads of grassy
weeds are present; (2) applying the proper amount of nitrogen at the correct
time according to the turfgrass present; and (3) using soil tests to determine
needed nutrients and lime.
Proven ways to selectively remove
thin paspalum in tolerant turfgrass species include: (1) multiple applications
of arsonate herbicides (DSMA, MSMA, CMA) in the early spring; or (2) using a
three step program consisting of MSMA, followed by foramsulfuron (Revolver) two
weeks after initial treatment, followed by MSMA four weeks after initial
treatment. However, MSMA may be phased out in 2009.
Recommendations of specific chemicals are based upon information on the
manufacturer's label and performance in a limited number of trials. Because
environmental conditions and methods of application may vary widely,
performance of the chemical will not always conform to the safety and pest
control standards indicated by experimental data. The order in which brand
names are given is not an indication of a recommendation or criticism.
Recommendations for the use of
agricultural chemicals are included in this publication as a convenience to the
reader. The use of brand names and any mention or listing of commercial
products or services does not imply endorsement by North Carolina State
University or discrimination against similar products or services not
mentioned. Other brand names may be labeled for use on turfgrasses. Individuals
who use agricultural chemicals are responsible for ensuring that the intended
use complies with current regulations and conforms to the product label. Be
sure to obtain current information about usage regulations and examine a
current product label before applying any chemical. For assistance, contact
your county's Cooperative Extension agent.
© North Carolina State University. This information sheet was prepared
by Fred Yelverton, Bridget R. Lassiter, Gail G. Wilkerson, Leon Warren, Travis Gannon, Jenifer J. Reynolds, and Gregory S. Buol. Department of Crop
Science, College of Agriculture & Life Sciences, North Carolina State
University. Prepared July 15, 2008. Available on-line at
www.turffiles.ncsu.edu. This publication was made possible through a grant
provided by the Center for Turfgrass Environmental Research & Education
(CENTERE) whose purpose is to support worthwhile projects that will benefit
both the private sector and the public, and protect the environment.