ORIGINAL ARTICLE
 
HIGHLIGHTS
  • Corncob yield of sweet maize was reduced from 30% up to 93% due to weed infestation.
  • In sweet corn, weeds are effectively managed by pre- or postemergence applied herbicides.
  • T+M+S gave better results in terms of efficacy, weed management indices, yield and net return.
  • Hand weeding was the most effective, unlike mechanical weeding, which was non-effective.
KEYWORDS
TOPICS
ABSTRACT
Weeds in sweet corn reduce the yield and are economically more harmful than other pests. The aim of this study was to evaluate the effects of mechanical weed control and efficacy of pre- and postemergence applied herbicides in sweet corn, and their influence on weed control expressed by various indices, corncob yield and net return. Field studies were carried out with preemergence thiencarbazone-methyl + isoxaflutole (at 29.7 + 74.3 g · ha–1), postemergence S-metolachlor + terbuthylazine (937.5 + 562.5 g · ha–1), mesotrione + terbuthylazine (100 + 652 g · ha–1), terbuthylazine + mesotrione + S-metolachlor (656.3 + + 131.3 + 1093.8 g · ha–1), weed free (WF, hand weeding), and mechanical weeding (MW, hoeing) to assess weed control, corncob yield and net return. Variability in potential yield losses was observed between years due to weather conditions at the level of 30 to even 93%. Hand weeding was the most effective, but it is expensive and needs is labour consuming, unlike mechanical weeding which was the cheapest but simultaneously the least effective. Among pre- and postemergence applied herbicides, a mixture of terbuthylazine + mesotrione + S-metolachlor was the most efficacious weed control treatment. It gave high corncob yield and economic net return.
ACKNOWLEDGEMENTS
The authors are grateful for the support provided by the Poznan University of Life Sciences, Poland including technical support and materials used for field experiments.
RESPONSIBLE EDITOR
Kinga Matysiak
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
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