Summer annual weed control in turfgrass.
Summarized information is given on herbicide evaluations carried out in 1986-1988 in Georgia, USA. Oxadiazon w.p. at 1 and 3 lb/acre controlled Digitaria spp. and Eleusine indica as well as or better than oxadiazon granules. Dithiopyr controlled Digitaria spp. and E. indica, but the e.c. required a higher rate than the granular formulation and severely injured centipedegrass (Eremochloa ophiuroides) at 1.5 lb/ha. BAS 514 (quinclorac) controlled Digitaria spp. but not E. indica. Centipedegrass was injured more by BAS 514 than was Tifway bermudagrass (Cynodon transvaalensis × C. dactylon). Pendimethalin on a fertilizer carrier controlled a higher percentage of Digitaria spp. and E. indica than when it was applied as a sprayable formulation. A single application of benfluralin + oryzalin each at 1.5 lb/acre and prodiamine at 0.75 lb/acre controlled Digitaria spp. and E. indica as effectively as did multiple applications. A single treatment of isoxaben at 0.75 lb/acre and benfluralin at 1.3 lb + trifluralin at 0.7 lb/acre controlled Digitaria spp. as effectively as did multiple applications, but neither controlled E. indica. Two applications of oryzalin or oxadiazon + benfluralin controlled Digitaria spp. and E. indica better than did a single application. Pendimethalin applied as a sprayable formulation was the only herbicide tested to completely control Polygonum aviculare.