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Lentil ( Lens culinaris ) Yield as Influenced by Duration of Wild Oat ( Avena fatua ) Interference

1987; Cambridge University Press; Volume: 35; Issue: 5 Linguagem: Inglês

10.1017/s0043174500060768

1550-2759

William S. Curran, Larry A. Morrow, Ralph E. Whitesides,

Agricultural pest management studies

Studies were conducted to evaluate the effect of wild oat ( Avena fatua L. # AVEFA) interference in lentils ( Lens culinaris Medik). An infestation of 32 and 65 wild oats/m 2 maintained up to 5 weeks in the field did not reduce lentil grain yield. However, 32 wild oats/m 2 reduced yields 32% when allowed to remain for 7 weeks and 49% if they remained until harvest time (11 weeks). Sixty-five wild oats/m 2 reduced grain yield 42 and 61% for the same time periods, respectively. In the growth chamber, 69 wild oats/m 2 reduced lentil plant dry weight 29% if allowed to remain for 3 weeks, 61% for 5 weeks, and 72% for 7 weeks (harvest time). The field data suggest that wild oat control measures may be delayed for several weeks after lentil emergence without reducing crop yield.