@article{Morales-Payan:257005,
      recid = {257005},
      author = {Morales-Payan, Jose P. and Santos, Bielinski M. and Stall,  William M.},
      title = {YIELD REDUCTIONS CAUSED BY SELECTED WEEDS IN LOWLAND  POTATO IN THE DOMINICAN REPUBLIC},
      address = {1997-07-06},
      number = {1887-2017-821},
      pages = {4},
      year = {1997},
      abstract = {Field experiments were conducted to assess the yield loss  caused by seasonlong interference of selected weeds in  lowland potato. Naturally occurring weed mixtures and  densities were used. Potato yield loss due to the  interference of Euphorbia heterophylla (1 plant/m2),  Phyllanthus spp., Boerhavia spp. (0.5 plant/m2 each),  Portulaca oleracea (7 plants/m2) or Eleusine indica (2  plants/m2) was not significant. Parthenium spp., Amaranthus  spp. and Rottboellia exaltata (5 plants/m2 each) caused 55,  50 and 28% yield reduction, respectively. Mixtures of  Parthenium, Amaranthus and Euphorbia (mixture 1) reduced  potato yield by 70%, Rottboellia, Eleusine and Euphorbia  combined (mixture 2) caused a 34% yield decrease, and mixed  stands of Phyllanthus, Eleusine, Boerhavia (mixture 3) and  Portulaca reduced potato yield by 14%. Results indicate  that interactions among the weed species in mixtures 1 and  2 occurred, since yield losses caused by weed mixtures do  not follow an non-interactive (neutral or additive) model  of yield reductions, whereas mixture 3 did.},
      url = {http://ageconsearch.umn.edu/record/257005},
      doi = {https://doi.org/10.22004/ag.econ.257005},
}