Fall armyworm (FAW) Spodoptera frugiperda is considered the main defoliating insect pest of maize in many countries. Silicon (Si) applied to plants has been shown to increase the resistance to insects, especially in grasses such as maize. This study characterized the effects of Si fertilization regarding priming, induced resistance, and tolerance to FAW in a landrace variety and hybrid of maize. Si was applied in soil of potted-plants as H₄SiO₄ at 2 t ha⁻¹ when maize plants were at V2 stage, and when they reached V3 two FAW neonates were placed in the plant’s whorls to cause herbivory. FAW performance was evaluated on excised leaf sections in the laboratory and on plants with larvae infesting V4-stage plants in the greenhouse. Concentrations of H₂O₂, malondialdehyde, and Si, and the activities of antioxidant enzymes were recorded and correlated to Si-based responses on plant growth, and FAW injury and performance. As main results, there was reduced FAW injury and larval weight gain in Si-treated plants subjected to herbivory. Greater root dry mass was observed in the landrace variety with Si and without herbivory. Landrace plants showed higher shoot weights than the hybrid under FAW infestation. Si-fertilized plants showed higher H₂O₂ concentrations. The highest peroxidase activities occurred in Si-treated plants without herbivory, and the catalase and superoxide dismutase activities were highest in Si-treated plants without herbivory or herbivory-injured plants without Si. In conclusion, Si-based defense in maize to FAW involve mixed effects of priming and tolerance, and were more pronounced in the landrace variety.

秋粘虫 (FAW) Spodoptera frugiperda在许多国家被认为是玉米的主要落叶害虫。已证明施用于植物的硅 (Si) 可增加对昆虫的抵抗力，尤其是在玉米等草类中。本研究描述了硅施肥对地方品种和玉米杂交种的引发、诱导抗性和对秋粘虫的耐受性的影响。_{以 H 4} SiO ₄形式在盆栽植物的土壤中施用2 t ha ^{-1的 Si}当玉米植株处于 V2 阶段时，当它们达到 V3 时，将两个 FAW 新生儿放在植物的轮生中以引起草食性。在实验室中对切下的叶切片和在温室中用幼虫侵染 V4 期植物的植物评估 FAW 性能。_{记录了 H 2} O ₂ 、丙二醛和 Si 的浓度以及抗氧化酶的活性，并将其与基于 Si 的植物生长反应、FAW 损伤和性能相关联。作为主要结果，Si 处理的植物遭受草食性的 FAW 伤害和幼虫体重增加减少。在有 Si 和没有草食性的地方品种中观察到更大的根干质量。长白植物在 FAW 侵染下的枝条重量高于杂种。施硅的植物表现出更高的 H₂ O ₂浓度。过氧化物酶活性最高出现在没有食草性的 Si 处理植物中，过氧化氢酶和超氧化物歧化酶活性在没有食草性的 Si 处理植物或没有 Si 的草食性伤害植物中最高。总之，玉米对秋粘虫的硅基防御涉及引发和耐受的混合效应，并且在地方品种中更为明显。