Weed dynamic and control in peach palm (Bactris gasipaes k.) for palm hearts.
The study was conducted at
Los Diamantes Experiment Station, located in Guapiles,
Costa Rica, to compare four sowing densities of thornless
palms and two weed management strategies (chemical and
physical) on weed population dynamics of this crop, during
the first year of growth. Weed cover and height, species
present and herbicide damage were among the variables
recorded. Soil tillage prior to the crop establishment
promoted weed germination from the seed bank. A total of
31 weed species were recorded from a 3452 m2 experimental
area during the first 14 months after sowing. An interaction
between sowing distance and weed management strategies
was determined for gramineus and broadleaf species.
Paspalum fasciculatum was the dominant species in plots
under hand weeding while Ageratum conyzoides prevailed in
glyphosate treated plots. Nine months after sowing, weed
height and cover along crop rows or between them were
different depending on the sowing density. In general,
chemical weed control was efficient, although care should be
taken during the first spraying when crop and weed height are
similar, to avoid crop damage.