Pheromone-Based Mating Disruption of Conogethes punctiferalis (Lepidoptera: Crambidae) in Chestnut Orchards

Simple Summary The study assessed a pheromone-based mating disruption (MD) for the control of Conogethes punctiferalis in Korean chestnut orchards. Over two years, field trials showed that MD effectively reduced male C. punctiferalis numbers, with male catch inhibition (MCI) ranging from 70.5% to 95.1%. MD treatments, including single-dosage (TS) and double-concentration (TD) or two-application (TT) methods, significantly reduced fruit damage. In 2022, TS achieved 63.9-73.6% efficacy, while in 2023, TD and TT showed variable but notable reductions in pest numbers and fruit damage. The study confirms the MD's efficacy in mitigating C. punctiferalis damage in chestnut orchards, highlighting its potential as an eco-friendly pest management strategy in agroforestry systems. Chestnuts (Castanea crenata Siebold and Zucc.) are one of the major agroforestry products in Korea, and Conogethes punctiferalis is a major pest of the chestnut fruit. Pheromone-based mating disruption (MD) has emerged as a promising eco-friendly approach to reduce population levels and ultimately mitigate fruit damage. Field trials were conducted over two years (2022-2023) in two commercial chestnut orchards in Central Korea that were infested with C. punctiferalis. Compared with the control treatment, the MD treatment effectively reduced the number of male C. punctiferalis captured in the MD treatment plots. Male catch inhibition (MCI) rates ranged from 70.5% to 82.7% in 2022 and from 87.8% to 95.1% in 2023. The MD efficacy (%) was calculated based on the total number of chestnut fruits collected and the number of fruits damaged by C. punctiferalis. In 2022, the MD efficacy of the single-dosage treatment (TS, 50 g/ha) was 63.9% in Orchard A and 73.6% in Orchard B. In 2023, the MD efficacies of the double-dosage treatment (TD, 100 g/ha) and the two-application treatment (TT, 50 g/ha in June and August) were 60.2% and 77.9% in Orchard A and 50.9% and 64.8% in Orchard B, respectively. This study confirms the efficacy of pheromone-based MD in reducing the C. punctiferalis numbers in chestnut orchards and damage to chestnut fruits.