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<p>Silicon (Si) has been widely recognized for its protective effects against rice tissue-feeding pests, but its impact on sap-feeding pests has been less explored. This study investigates the role of Si supplementation in enhancing rice plant resistance to the phloem-feeding white-backed plant hopper, <i>Sogatella furcifera</i>. Through the application of calcium silicate (CaSiO₃) and diatomaceous earth (DAE), significant reductions in hopper infestation and increases in grain yield were observed. At application rates of 300&#xa0;kg ha<sup>− 1</sup> for DAE and 3.0 t ha<sup>− 1</sup> for CaSiO₃, hopper populations decreased by 59% and 79%, respectively, while grain yields increased by 52% and 66%. The increased resistance was attributed to higher silica uptake and deposition in plant tissues, which formed a physical barrier that impeded hopper probing. Additionally, Si-mediated biochemical changes included reduced concentrations of proline, phenols, and soluble proteins, along with the down regulation of superoxide dismutase (SOD), an antioxidant enzyme. These findings highlight both physical and physiological defense mechanisms activated by Si, contributing to enhanced plant resistance against <i>S. furcifera</i>.</p>

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Diatomaceous earth and calcium silicate improves plant resistance to white-backed plant hopper, Sogatella furcifera (Horvath) in rice as evident by silicon deposits in leaf tissues

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Surabhika Panda,
  • H. Raghunandan,
  • Anindita Das,
  • Anath Bandhu Das,
  • Santosh Kumar Panda

摘要

Silicon (Si) has been widely recognized for its protective effects against rice tissue-feeding pests, but its impact on sap-feeding pests has been less explored. This study investigates the role of Si supplementation in enhancing rice plant resistance to the phloem-feeding white-backed plant hopper, Sogatella furcifera. Through the application of calcium silicate (CaSiO₃) and diatomaceous earth (DAE), significant reductions in hopper infestation and increases in grain yield were observed. At application rates of 300 kg ha− 1 for DAE and 3.0 t ha− 1 for CaSiO₃, hopper populations decreased by 59% and 79%, respectively, while grain yields increased by 52% and 66%. The increased resistance was attributed to higher silica uptake and deposition in plant tissues, which formed a physical barrier that impeded hopper probing. Additionally, Si-mediated biochemical changes included reduced concentrations of proline, phenols, and soluble proteins, along with the down regulation of superoxide dismutase (SOD), an antioxidant enzyme. These findings highlight both physical and physiological defense mechanisms activated by Si, contributing to enhanced plant resistance against S. furcifera.