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Optimum Harvest Time of Cucumis africanus Fruit Using Concentration of Cucurbitacin B as a Maturity Standard

Author

Listed:
  • Kagiso Shadung
  • Phatu Mashela
  • Vusimuzi Mulaudzi
  • Maboko Mphosi
  • Ignatious Ncube

Abstract

Fruit of wild watermelon (Cucumis africanus) are used to manufacture nemafric-BL phytonematicide for the management of population densities of the notorious root-knot (Meloidogyne species) nematodes on various crops. However, the concentration of the active ingredient, namely, cucurbitacin B, is dependent on the developmental stage of the fruit. A field study was, therefore, conducted to establish the optimum harvest time where C. africanus fruit would have the highest concentration of cucurbitacin B in order to ensure consistent quality of the phytonematicide. Fruit were harvested weekly from 60 to 110 days after transplating, prepared for extraction and cucurbitacin B quantified using reverse phase HPLC. Concentrations of cucurbitacin B were optimised at 5.0 weeks, which translated to a 95-day harvest time after seeding.

Suggested Citation

  • Kagiso Shadung & Phatu Mashela & Vusimuzi Mulaudzi & Maboko Mphosi & Ignatious Ncube, 2015. "Optimum Harvest Time of Cucumis africanus Fruit Using Concentration of Cucurbitacin B as a Maturity Standard," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 7(10), pages 181-181, September.
    • Handle: RePEc:ibn:jasjnl:v:7:y:2015:i:10:p:181
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    References listed on IDEAS

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    1. E. Křístková & A. Lebeda & V. Vinter & O. Blahoušek, 2003. "Genetic resources of the genus Cucumis and their morphological description (English-Czech version)," Horticultural Science, Czech Academy of Agricultural Sciences, vol. 30(1), pages 14-42.
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      JEL classification:

      • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
      • Z0 - Other Special Topics - - General

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