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<p>The invasive fall armyworm, <i>Spodoptera frugiperda</i> (J.E. Smith), has become a major constraint to sweet corn (<i>Zea mays</i> subsp. <i>saccharata</i> S.) production in Indonesia, highlighting the urgent need for sustainable Integrated Pest Management (IPM) strategies. This study evaluated the field performance of an integrated IPM package combining sweet corn and turmeric (<i>Curcuma longa</i> L.) intercropping with foliar eco-enzyme application compared with a sweet corn monoculture. Because the experiment involved two primary treatments, the study aimed to demonstrate the overall effectiveness of the integrated system rather than isolate the individual contributions of each component. Field trials were conducted from April to September 2025 under comparable agroecological conditions with five replicated plots per treatment. The integrated system significantly suppressed pest populations; specifically, by 6 weeks after planting (WAP), plant infestation reached 88% ± 1.26% compared with 100% ± 0.00% in the monoculture. Similarly, at 5 WAP, larval density was substantially lower in the integrated treatment at 4 ± 0.55 larvae per sample than in the monoculture at 11.8 ± 1.07 larvae per sample. Reduced pest pressure resulted in significantly lower ear damage intensity at harvest at 34% ± 3.33% compared with 69% ± 5.10% for the control. Consequently, the integrated treatment significantly improved yield attributes, including ear weight at 276.88 ± 5.77&#xa0;g versus 199.44 ± 8.27&#xa0;g and ear length at 20.82 ± 0.11&#xa0;cm versus 19.55 ± 0.22&#xa0;cm. These findings demonstrate the potential of integrating crop diversification with bio-based inputs as an ecological IPM strategy against <i>S. frugiperda</i>, although the specific mechanisms underlying pest suppression remain hypothetical and require further mechanistic investigation.</p>

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Integrated turmeric intercropping and bio-based eco-enzyme application for synergistic management of fall armyworm, Spodoptera frugiperda (J.E. Smith) in sweet corn

  • 期刊论文

  • 发表日期：

    2026年5月1日

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  • Wilyus Wilyus,
  • Ravindra Chandra Joshi,
  • Asniwita Asniwita,
  • Irianto Irianto

摘要

The invasive fall armyworm, Spodoptera frugiperda (J.E. Smith), has become a major constraint to sweet corn (Zea mays subsp. saccharata S.) production in Indonesia, highlighting the urgent need for sustainable Integrated Pest Management (IPM) strategies. This study evaluated the field performance of an integrated IPM package combining sweet corn and turmeric (Curcuma longa L.) intercropping with foliar eco-enzyme application compared with a sweet corn monoculture. Because the experiment involved two primary treatments, the study aimed to demonstrate the overall effectiveness of the integrated system rather than isolate the individual contributions of each component. Field trials were conducted from April to September 2025 under comparable agroecological conditions with five replicated plots per treatment. The integrated system significantly suppressed pest populations; specifically, by 6 weeks after planting (WAP), plant infestation reached 88% ± 1.26% compared with 100% ± 0.00% in the monoculture. Similarly, at 5 WAP, larval density was substantially lower in the integrated treatment at 4 ± 0.55 larvae per sample than in the monoculture at 11.8 ± 1.07 larvae per sample. Reduced pest pressure resulted in significantly lower ear damage intensity at harvest at 34% ± 3.33% compared with 69% ± 5.10% for the control. Consequently, the integrated treatment significantly improved yield attributes, including ear weight at 276.88 ± 5.77 g versus 199.44 ± 8.27 g and ear length at 20.82 ± 0.11 cm versus 19.55 ± 0.22 cm. These findings demonstrate the potential of integrating crop diversification with bio-based inputs as an ecological IPM strategy against S. frugiperda, although the specific mechanisms underlying pest suppression remain hypothetical and require further mechanistic investigation.