Seedling Growth Responses of Buffelgrass (Pennisetum ciliare) to Tebuthiuron and Honey Mesquite (Prosopis glandulosa)

Tebuthiuron {N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylurea} at 2 or 4 ppmw placed 0 to 3, 8 to 11, or 15 to 18 cm deep in soil columns reduced root and shoot weights of buffelgrass [Pennisetum ciliare (L.) Link # PESCI] 30 days after emergence. Plains bristlegrass (Setaria macros...

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Bibliographic Details
Published in:Weed science 1986-01, Vol.34 (1), p.88-93
Main Authors: Rasmussen, G. Allen, Smith, Roger P., Scifres, Charles J.
Format: Article
Language:English
Subjects:
Acid soils
Agricultural soils
Biological and medical sciences
BIOLOGICAL COMPETITION
CENCHRUS
Chemical control
Clay loam soils
COMPETENCIA BIOLOGICA
COMPETITION BIOLOGIQUE
CRECIMIENTO
CROISSANCE
FITOTOXICIDAD
Fundamental and applied biological sciences. Psychology
Grasses
GROWTH
Honey
MALEZAS
MAUVAISE HERBE
Organic soils
Parasitic plants. Weeds
PARCOURS
PASTIZALES
PASTURES
PATURAGES
Phytopathology. Animal pests. Plant and forest protection
PHYTOTOXICITE
PHYTOTOXICITY
PLANTULAS
PLANTULE
PROSOPIS
RANGELANDS
Sandy clay soils
Sandy loam soils
SEEDLINGS
SETARIA (GRAMINEA)
SETARIA (GRAMINEE)
SETARIA (GRASS)
TERRENOS DE PASTURA
Tillers
Weed Control and Herbicide Technology
WEEDS
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Summary:Tebuthiuron {N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylurea} at 2 or 4 ppmw placed 0 to 3, 8 to 11, or 15 to 18 cm deep in soil columns reduced root and shoot weights of buffelgrass [Pennisetum ciliare (L.) Link # PESCI] 30 days after emergence. Plains bristlegrass (Setaria macrostachya H.B.K.) seedling shoot weights were not reduced when 2 ppmw tebuthiuron was placed 8 to 11 cm deep or deeper. Effects of tebuthiuron at 0.13 to 0.50 ppmw on buffelgrass shoot and net tiller production were not moderated by the presence of honey mesquite (Prosopis glandulosa # PRCJG) in the pots. However, regardless of tebuthiuron dosage, average height and shoot weight of buffelgrass seedlings were greater when seedlings were grown in soil collected from beneath honey mesquite canopies compared to growth in soil from interspaces. Therefore, spatial variations in buffelgrass response to applications of tebuthiuron for control of invading shrubs may largely be attributed to soil changes induced by woody plants rather than to presence of shrubs.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500026515