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<p><i>Tetrapleura tetraptera</i> is a well-known tree species with several nutritional, health and household benefits. Recent reports indicate that <i>T. tetraptera</i> suffers from pest infestation which affects tree growth and fruit productivity. The study was conducted to assess the prevalence of dieback and mortality of <i>T. tetraptera</i> in monoculture and mixed stand, and determine the influence of tree age, growth and ecological zone on dieback and tree mortality. Using 25&#xa0;m x 25&#xa0;m sampling plots, with three replications in <i>T. tetraptera</i> plantations at age 4, 8, 9, 11, 12 and 15 years, we found that dieback occurred in all <i>T. tetraptera</i> plantations irrespective of the stand age. However, the oldest (15 years) <i>T. tetraptera</i> stand suffered the highest mortality (87.7%) and no mortality was observed in the youngest (4 years) plantation. Additionally, pest infestation was higher in the monoculture (97.4%) relative to the mixed plantation (93.2%) but tree mortality was significantly less (17.8%) in mixed plantation than monoculture (43.5%). This suggest that an integrated pest management strategy combining eco-friendly pest control methods and mixed plantations could mitigate tree mortality caused by the insect pest thwarting the efforts to domesticate <i>T. tetraptera.</i></p>

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Efforts towards restoring Tetrapleura tetraptera in forest landscapes threatened by the insect pest, Tragocephala nobilis

  • 期刊论文

  • 发表日期：

    2025年7月31日

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  • Adams Latif Mohammed,
  • John Kobina Mensah,
  • Simon Abugre,
  • Michael Asigbaase,
  • Emmanuel Opuni-Frimpong

摘要

Tetrapleura tetraptera is a well-known tree species with several nutritional, health and household benefits. Recent reports indicate that T. tetraptera suffers from pest infestation which affects tree growth and fruit productivity. The study was conducted to assess the prevalence of dieback and mortality of T. tetraptera in monoculture and mixed stand, and determine the influence of tree age, growth and ecological zone on dieback and tree mortality. Using 25 m x 25 m sampling plots, with three replications in T. tetraptera plantations at age 4, 8, 9, 11, 12 and 15 years, we found that dieback occurred in all T. tetraptera plantations irrespective of the stand age. However, the oldest (15 years) T. tetraptera stand suffered the highest mortality (87.7%) and no mortality was observed in the youngest (4 years) plantation. Additionally, pest infestation was higher in the monoculture (97.4%) relative to the mixed plantation (93.2%) but tree mortality was significantly less (17.8%) in mixed plantation than monoculture (43.5%). This suggest that an integrated pest management strategy combining eco-friendly pest control methods and mixed plantations could mitigate tree mortality caused by the insect pest thwarting the efforts to domesticate T. tetraptera.