Life table and feeding behavior of Myzus persicae (Hemiptera: Aphididae) at sublethal concentrations of Afidopyropen, Spirotetramat and sulfoxaflor

The green peach aphid Myzus persicae Sülzer is a major insect pest of cruciferous plants, including vegetables such as Chinese cabbage. The objective of the present study was to determine the effects of sublethal afidopyropen and spirotetramat concentrations on the survival and reproduction of M. persicae. In addition, we used an electrical penetration graph (EPG) to study the feeding behavior of M. persicae on Chinese cabbage leaves treated with various concentrations of afidopyropen, spirotetramat and sulfoxaflor. The results showed that sublethal concentrations (LC₁₀ and LC₃₀) of afidopyropen and spirotetramat significantly decreased adult longevity and fecundity. However, sulfoxaflor had no significant effects. Several population parameters, including the net reproductive rate (R₀), intrinsic rate of increase (r_m), mean generation time (T), finite rate of increase (λ), and doubling time (DT), were significantly decreased only at the LC₃₀ of spirotetramat. According to the EPG feeding behavior analyses, when all three insecticides were applied at LC₃₀, the nonpenetration (NP) waveform significantly increased. The above results can be used as basic data for the well-planned use of insecticides.