Development of an Efficient Egg Collection Method and Evaluation of Ovicidal Effects of Insecticides on <i>Aromia bungii</i>（Coleoptera: Cerambycidae）

The red-necked longhorn beetle, Aromia bungii（Faldermann）（Coleoptera: Cerambycidae）, is an invasive species with a high reproductive capacity that causes severe damage to Prunus trees（Rosaceae）. In this study, we developed an oviposition substrate combining a black net with 0.4-mm mesh and filter paper, enabling efficient egg collection by utilizing the scent of peach branches. The peach branch scent increased egg production by approximately 3.4 times compared with that in the untreated controls. Using eggs collected with this method, we evaluated the ovicidal effects of various insecticides. Malathion/MEP emulsion and cartap hydrochloride showed 100% ovicidal efficacy, while diazinon wettable powder demonstrated a high efficacy of 70.7%. When assessing differences in effectiveness across the egg developmental stages, diazinon wettable powder showed consistent efficacy, maintaining high overall control effectiveness in the late developmental stages by exhibiting an insecticidal effect on hatched larvae, despite reduced direct egg mortality. Cartap hydrochloride exhibited high efficacy against the early to middle developmental stages. Additionally, Beauveria bassiana Vuillemin（Hypocreales: Cordycipitaceae）wettable powder demonstrated high efficacy against hatched larvae. These findings contribute to the development of efficient pest control strategies.