European pepper moth, Duponchelia fovealis (Lepidoptera: Crambidae), is an invasive polyphagous pest that causes economic losses in strawberry production. This study assessed the preference and performance of D. fovealis on four strawberry cultivars (Albion, Aromas, Portola, and San Andreas) and an artificial diet to determine resistance mechanisms against this pest. Duponchelia fovealis completed its life cycle on the four strawberry cultivars, with differences in development time and reproduction. Larval stage was longer on ‘Albion’ (27.00 ± 0.37 days). The lowest pupal weights were recorded for males on ‘San Andreas’ (24.3 ± 0.4 mg) and for females on ‘Portola’ (27.3 ± 0.4 mg). The shortest longevity of females was observed on ‘Aromas’ (11.14 ± 1.44 days). The net reproductive rates of D. fovealis were lower on ‘Albion’ (150.2 ± 4.8), ‘Aromas’ (178.0 ± 16.3) and ‘Portola’ (164.5 ± 13.2) when compared to the artificial diet (206.8 ± 14.0). Approximately a third of the larvae fed with strawberry leaves had an additional instar (sixth instar), whereas those fed on the artificial diet only had five instars. The highest foliar consumption was observed on ‘Albion’ (6.37 ± 0.82%). In a no-choice test, oviposition was reduced in ‘Albion’ (7.83 ± 1.85 eggs/leaf), which had the highest number of glandular trichomes (28.87 ± 1.99 trichomes per 1.7 mm² of leaf). Evidence of antibiosis resistance was observed in the Albion, Aromas, and Portola strawberry cultivars (longer egg-adult development time, lower pupal weights and an additional larval instar), while evidence of antixenosis could not be confirmed. This is the first report of host plant resistance to D. fovealis in four strawberry cultivars.

欧洲胡椒蛾Duponchelia fovealis（鳞翅目：小海棠科）是一种侵入性杂食性害虫，给草莓生产造成经济损失。本研究评估了D. fovealis对四种草莓品种（Albion、Aromas、Portola 和 San Andreas）的偏好和性能以及人工饲料以确定对该害虫的抗性机制。黄花莲在四个草莓品种上完成了它的生命周期，发育时间和繁殖存在差异。“Albion”上的幼虫期较长（27.00 ± 0.37 天）。在“圣安德烈亚斯”（24.3 ± 0.4 毫克）和“波托拉”（27.3 ± 0.4 毫克）上，雄性的蛹重量最低。在“Aromas”（11.14 ± 1.44 天）上观察到女性的最短寿命。D. fovealis的净繁殖率与人工饮食 (206.8 ± 14.0) 相比，'Albion' (150.2 ± 4.8)、'Aromas' (178.0 ± 16.3) 和 'Portola' (164.5 ± 13.2) 的得分较低。大约三分之一的以草莓叶为食的幼虫长了一龄（六龄），而以人工饲料喂养的幼虫只有五龄。在'Albion' 上观察到最高的叶面消耗 (6.37 ± 0.82%)。在无选择测试中，'Albion' 的产卵减少（7.83 ± 1.85 个卵/叶），其中腺毛状体数量最多（每 1.7 mm 2 有 28.87 ± 1.99 个毛状体^）叶）。在 Albion、Aromas 和 Portola 草莓品种中观察到抗生素抗性的证据（更长的卵-成虫发育时间、更低的蛹重量和额外的幼虫龄），而无法证实抗毒素的证据。这是四个草莓品种中寄主植物对D. fovealis的抗性的第一份报告。