Sublethal and Transgenerational Effects of Cyclaniliprole on Demographic Parameters in Rhopalosiphum padi and Schizaphis graminum (Hemiptera: Aphididae)

Cyclaniliprole is a novel third-generation anthranilic diamide insecticide which has broad-spectrum efficacy against various pests, including aphids. <i>Rhopalosiphum padi</i> and <i>Schizaphis graminum</i> are the two primary aphid species that infest wheat crops. This investigation evaluates cyclaniliprole's acute toxicity and sublethal and transgenerational effects on both aphid species. The acute toxicity assessment revealed obvious insecticidal activity, with 24 h LC₅₀ values of 38.56 mg/L for <i>R. padi</i> and 33.71 mg/L for <i>S. graminum</i>. Sublethal exposure (LC₁₅ and LC₃₅ in <i>R</i>. <i>padi</i>; LC₃₅ in <i>S</i>. <i>graminum</i>) significantly reduced adult longevity and fecundity in the F₀ generation. In the F₁ generation, cyclaniliprole at LC₃₅ significantly reduced the fourth nymph stage in <i>R</i>. <i>padi</i>, whereas at LC₁₅, it shortened the third nymph stage duration in <i>S</i>. <i>graminum</i> compared to the control. Sublethal concentrations (LC₁₅ and LC₃₅) of cyclaniliprole significantly reduced age-stage-specific survival rate (<i>s_xj</i>), age-specific survival rate (<i>l_x</i>), age-specific maternity (<i>l_xm_x</i>), and age-stage life expectancy (<i>e_xj</i>) in the F₁ generation of <i>R</i>. <i>padi</i>, while only LC₃₅ decreased <i>l_x</i>, <i>l_xm_x</i>, and <i>e_xj</i> in <i>S</i>. <i>graminum</i>. Additionally, LC₃₅ significantly reduced the net reproductive rate (<i>R</i>₀) in the F₁ generation of <i>R</i>. <i>padi</i> compared to the control. These findings suggest that cyclaniliprole exhibit notable acute toxicity against both aphid species and that sublethal concentrations adversely affected the F₀ generation, with no observed hormetic effects in the F₁ generations of <i>R. padi</i> and <i>S. graminum</i>. The findings offer valuable insights for assessing the comprehensive insecticidal potential of cyclaniliprole.