Portal de Periódicos da CAPES

Atrazine and Burning in Tallgrass Prairie Infested with Prairie Threeawn

1990; University of Arizona; Volume: 43; Issue: 5 Linguagem: Inglês

10.2307/3899005

2162-2728

David M. Engle, Terrence G. Bidwell, Jimmy F. Stritzke, Dale Rollins,

Plant and fungal interactions

Prairie threeawn (An?rtUa o&a&aMicbx.) is an indicator of deteriorated range and is unpalatable and mechanicaiiy injurious to livestock.The effects of date of burning (November, February, or April) and atrazine [2-chioro-4-@thyiamino)-6+sopropyiamino)-S-triazine] applied in March at 0 or 1.12 kg/ha were evaiuated in northcentral Oklahoma on tallgrass prairie hay meadows h&&d with prairie threeawn.Atrazine provided consistent control of prairie threeawn and increased yield of desirable species in 2 of the 3 studies.Bunring in April reduced prairie threeawn in 1 of 3 studies, but burning in February or November did not reduce p&e threeawn in any of the studies.Combining ame and burning controiled prairie threeawn no better than atrazine alone when burning was sevti months before or after application of atrazine.However, burning just 1 month before application of atrazine decreased the activity of atrazine on prairie threeawn.Burning alone or burning combined with atrazine did not increase production of desirable species.