Seed dormancy and germination phenology of grass weeds and implications for their control in cereals


  • K.F. Kon
  • G.B. Follas
  • D.E. James



Seeds of Italian ryegrass perennial ryegrass wild oat winter wild oat phalaris and barnyard grass collected during the 2005/06 season were tested for dormancy and germination phenology between April and December 2006 In laboratory and outdoor environments dormancy was widespread in grass weed but not in ryegrass seeds The seeds of grass weeds had better germination in the outdoor environment than the laboratory In the outdoor environment only 15 of wild oat and winter wild oat 1963 of phalaris and 39 of barnyard grass seed germinated Protracted germination varied between species in two to seven flushes The earliest timing for effective postemergence grass control under the experimental conditions appeared to be about 6 weeks after sowing for wild oats and ryegrasses 12 weeks for phalaris and 14 weeks for barnyard grass The extended germination periods of phalaris and barnyard grass are a challenge to growers in designing a costeffective herbicide programme




How to Cite

Kon, K.F., G.B. Follas, and D.E. James. “Seed Dormancy and Germination Phenology of Grass Weeds and Implications for Their Control in Cereals”. New Zealand Plant Protection 60 (August 1, 2007): 174–182. Accessed September 27, 2021.




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