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<p>Turmeric (<i>Curcuma longa</i> L.), a crop of great medicinal and economic importance, often suffers from reduced productivity due to pest infestations and environmental stresses. This study evaluated the effects of different rhizome priming methods, including hydropriming, NaCl-priming, and KNO<sub>3</sub> priming, on the growth, yield, and resistance to shoot borer (<i>Conogethes punctiferalis</i> Guen.) in three turmeric varieties (Prabha, Prathibha, and Pragati). The results showed that priming significantly improved vegetative growth, chlorophyll and proline content, and rhizome yield compared to non-primed controls. Pest infestation was substantially reduced in primed plants (4–17%) relative to controls (35–56%), with KNO<sub>3</sub> priming proving the most effective. Moreover, a reduction in malondialdehyde (MDA) levels in primed plants suggested lower oxidative stress and better cellular integrity. Among treatments, KNO<sub>3</sub> priming consistently led to superior growth performance and pest resistance. These findings underscore the potential of rhizome priming, especially with KNO<sub>3</sub> as a simple, eco-friendly, and effective strategy to enhance turmeric resilience against biotic and abiotic stresses, thereby supporting more sustainable cultivation practices.</p>

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Potassium nitrate (KNO3) rhizome priming enhances growth, yield, and shoot borer resistance in turmeric (Curcuma longa L.)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月29日

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  • T. R. Athira,
  • K. C. Jisha

摘要

Turmeric (Curcuma longa L.), a crop of great medicinal and economic importance, often suffers from reduced productivity due to pest infestations and environmental stresses. This study evaluated the effects of different rhizome priming methods, including hydropriming, NaCl-priming, and KNO3 priming, on the growth, yield, and resistance to shoot borer (Conogethes punctiferalis Guen.) in three turmeric varieties (Prabha, Prathibha, and Pragati). The results showed that priming significantly improved vegetative growth, chlorophyll and proline content, and rhizome yield compared to non-primed controls. Pest infestation was substantially reduced in primed plants (4–17%) relative to controls (35–56%), with KNO3 priming proving the most effective. Moreover, a reduction in malondialdehyde (MDA) levels in primed plants suggested lower oxidative stress and better cellular integrity. Among treatments, KNO3 priming consistently led to superior growth performance and pest resistance. These findings underscore the potential of rhizome priming, especially with KNO3 as a simple, eco-friendly, and effective strategy to enhance turmeric resilience against biotic and abiotic stresses, thereby supporting more sustainable cultivation practices.