Priming or presoaking seed of common carpetgrass (Axonopus affinis Chase) and centipedegrass [Eremochloa ophiuroides Munro. (Kunz)] increased germination percentage and decreased mean time of germination (MTG) at 20, 25, and 30 °C. The effect of presoaking and priming was dependent on grass species and temperature. The optimum seed germination temperature for both of these warm-season species was 30 °C. Maximum effect on common carpetgrass or centipedegrass seeds was achieved by priming in 2% KNO3; higher concentrations did not improve germination percentage or MTG, and 4% was in some cases detrimental. Germination was higher and MTG lower at 20 and 30 °C than at 15 °C. Presoaking common carpetgrass and centipedegrass seeds was the most efficient seed enhancement treatment for germination at 30 °C.
Edward W. Bush, Paul Wilson, Dennis P. Shepard, and Gloria McClure
C.E. Johnson, W.J. Bourgeois, P.W. Wilson, J.E. Boudreaux, and F.J. Peterson
L.H. Rolston, D.R. La Bonte, W.A. Mulkey, C.A. Clark, J.M. Cannons, and P.W. Wilson
L.H. Rolston, D.R. La Bonte, W.A. Mulkey, C.A. Clark, J.M. Cannon, and P.W. Wilson
D.R. La Bonte, W.A. Mulkey, C.A. Clark, L.H. Rolston, J.M. Cannon, P.W. Wilson, and P.C. St. Amand
C.E. Johnson, W.A. Young, J.E. Boudreaux, W.J. Bourgeois, F.J. Peterson, and P.W. Wilson
Gregory R. Armel, Robert J. Richardson, Henry P. Wilson, Brian W. Trader, Cory M. Whaley, and Thomas E. Hines
Field and greenhouse studies were conducted in 2001 and 2002 near Painter, VA, to determine the level of weed control and pepper (Capsicum annuum) tolerance to postemergence applications of the acetolactate synthase (ALS) inhibitors trifloxysulfuron, halosulfuron, sulfosulfuron, cloransulam, and tribenuron. Based on measurements of visual injury, heights, dry weights, and chlorophyll content of pepper, the safest ALS inhibitor to pepper was trifloxysulfuron followed by halosulfuron, cloransulam, sulfosulfuron, and tribenuron. In addition, trifloxysulfuron was the only herbicide that provided greater than 86% control of pigweed species (Amaranthus spp.) and carpetweed (Mollugo verticillata) in both years of the field study. Trifloxysulfuron was also the only herbicide evaluated that did not reduce pepper yield compared with the control in both years of the field study.