Vol. 125 (2012): Proceedings of the Florida State Horticultural Society
Vegetable

Effect of Early Season Weed Competition Duration on Onion Yield

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  • Ludger Jean-Simon,
  • Joseph Benor Mont-Gerard,
  • Joseph Junior Sander
Ludger Jean-Simon
Université Notre Dame d’Haiti (UNDH), Faculté d’Agronomie, B.P. 151, Les Cayes, Haiti
Joseph Benor Mont-Gerard
Université Notre Dame d’Haiti (UNDH), Faculté d’Agronomie, B.P. 151, Les Cayes, Haiti
Joseph Junior Sander
Université Notre Dame d’Haiti (UNDH), Faculté d’Agronomie, B.P. 151, Les Cayes, Haiti

Published 2012-12-01

Keywords

  • Allium cepa,
  • Cyperus rotundus,
  • Rottboellia cochinchinensis,
  • bulb size,
  • yield loss

Abstract

Weeds are one of the main plant protection problems in onion fields. A field experiment was conducted at Mersan, South Haiti to determine the effect of early season weed competition duration on the yield of onion (Allium cepaL.). The experimental design was a randomized complete block of 7 treatments (weed-free from planting to harvest, weed competition up to 2, 4, 6, 8, or 10 weeks after planting, and weed competition from planting to harvesting) with 4 replications. Onion yield decreased as the duration of early season weed competition increased. Yield loss was 14.45% when weed removal was initiated at 2 weeks after transplanting the crop, and 87.66% when the onion crop was in the presence of weeds season long.

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