Interference Durations of Bearded Sprangletop (Leptochloa fascicularis) in Rice (Oryza sativa)

Interference Durations of Bearded Sprangletop (Leptochloa fascicularis) in Rice (Oryza sativa)

Effects of bearded sprangletop interference durations on Lemont and Newbonnet rice cultivars were studied. Interference durations of 63, 70, and 130 d after rice emergence reduced Lemont grain yields 11, 21, and 50%, respectively, and lowered Newbonnet grain yields 11, 13, and 37%, respectively. Int...

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Veröffentlicht in:Weed science 1994-04, Vol.42 (2), p.180-183
Hauptverfasser: Carey, V. Frank, Smith, Roy J., Talbert, Ronald E.
Format: Artikel
Sprache:eng
Schlagworte:
Agronomy. Soil science and plant productions
ALTURA
ARKANSAS
Biological and medical sciences
Biomass
Biomass production
COMPETENCIA BIOLOGICA
COMPETITION BIOLOGIQUE
DURACION
DUREE
Florets
Fundamental and applied biological sciences. Psychology
Generalities, botany, ecology, damages, economic importance
GRAIN
Grains
GRANOS
HAUTEUR
Herbicides
LEPTOCHLOA
MALEZAS
MAUVAISE HERBE
Nitrogen
ORYZA SATIVA
PAILLE DE RIZ
PAJA DE ARROZ
Panicles
Parasitic plants. Weeds
PERDIDAS
PERTE
Phytopathology. Animal pests. Plant and forest protection
Plants
RENDEMENT
RENDEMENT DES CULTURES
RENDIMIENTO
RENDIMIENTO DE CULTIVOS
Rice
Straw
VARIEDADES
VARIETE
Weed Biology and Ecology
Weeds
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Zusammenfassung:Effects of bearded sprangletop interference durations on Lemont and Newbonnet rice cultivars were studied. Interference durations of 63, 70, and 130 d after rice emergence reduced Lemont grain yields 11, 21, and 50%, respectively, and lowered Newbonnet grain yields 11, 13, and 37%, respectively. Interference durations of 21 to 56 d after emergence did not reduce grain yields of either cultivar. Bearded sprangletop grown in Lemont rice produced more biomass than that in Newbonnet. Season-long interference reduced plant height and straw dry weight of Lemont more than that of Newbonnet.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500080243