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One-eye-set sugarcane susceptibility to weed interference.

Lucas R Beluci1, Allan L Bacha1, Arthur A M Barroso2

  • 1Universidade Estadual Paulista/UNESP/FCAV, Departamento de Biologia Aplicada à Agropecuária, Via de Acesso Prof. Paulo Donato Castellane, s/n, 14884-900 Jaboticabal, SP, Brazil.

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Controlling weeds is crucial for one-eye-set sugarcane seedlings. The critical weed control period is 103 days, significantly impacting yield and quality if ignored.

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Area of Science:

  • Agronomy
  • Weed Science
  • Plant Physiology

Background:

  • One-eye-set sugarcane seedlings offer improved plant health and vigor.
  • Limited research exists on weed competition specific to this sugarcane planting method.
  • Understanding critical weed control periods is essential for optimizing yield.

Purpose of the Study:

  • To determine the critical period of weed interference in the one-eye-set sugarcane system.
  • To evaluate the impact of specific weed species (Ipomoea hederifolia and Merremia aegyptia) on sugarcane productivity and quality.
  • To assess the differential interference effects of these two weed species.

Main Methods:

  • Two field experiments were conducted to simulate weed interference.
  • Experiment 1: Assessed interference from a mixed weed community (I. hederifolia and M. aegyptia) on sugarcane.
  • Experiment 2: Evaluated competition between individual weed species and sugarcane plants, measuring productivity and quality.

Main Results:

  • The critical period for weed interference prevention was 103 days post-planting.
  • Weed interference began 35 days and ended 138 days after planting.
  • Full-cycle weed coexistence reduced sugarcane productivity by 60% and negatively impacted total reducing sugars.
  • Merremia aegyptia caused greater interference (77%) than Ipomoea hederifolia (72%) in later stages.

Conclusions:

  • Effective weed management within the first 103 days is vital for one-eye-set sugarcane.
  • Weed competition significantly reduces yield and quality, affecting crop tillering and sugar content.
  • Merremia aegyptia poses a greater competitive threat than Ipomoea hederifolia in the later growth stages of sugarcane.