# Control of Cydia pomonella (L.) (Lepidoptera: Tortricidae) in apple orchards using the mating disruption technique

## TL;DR

This study shows that using pheromone dispensers effectively reduces codling moth infestations in apple orchards in Türkiye.

## Contribution

The study provides empirical evidence of ISOCOD-C pheromone dispensers' efficacy in controlling C. pomonella in commercial apple orchards.

## Key findings

- Pheromone-treated orchards had significantly fewer male moths caught in traps compared to control orchards.
- Infestation rates in treated orchards were much lower than in control orchards in both 2023 and 2024.
- The use of pheromone dispensers reduced the number of sprays needed for pest control by over 40%.

## Abstract

The codling moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae), is a major, economically important pest of apple orchards in Türkiye. This study was conducted with the objective of evaluating the efficacy of the mating disruption technique in controlling C. pomonella in commercial apple orchards in the Beyşehir district (Konya) during the years 2023 and 2024. The experiments were conducted in six commercial apple orchards. Three of these orchards were treated with pheromones, while the remaining three served as control orchards. The efficacy of mating disruption was evaluated by comparing the number of C. pomonella males caught in Delta traps in pheromone-treated and control orchards and the infestation rates in these orchards. Delta traps baited with synthetic sex pheromone were hung in each pheromone-treated and control apple orchard to monitor the adult codling moths, and the number of males was recorded weekly. Once the first adult was caught in Delta traps, ISOCOD-C (380 mg (E,E)-8,10-Dodecadienol, dodecanol, tetradecanol) pheromone dispensers were hung at a dose of 500 pieces/ha, 1.5–1.8 m above the soil surface in four directions of the trees in the apple orchards where the mating disruption technique was applied. To determine the infestation rate of C. pomonella, 10 fruits from 10 trees (a total of 100 fruits) were randomly selected and the infested fruits were recorded weekly. ISOCOD-C pheromone dispensers suppressed capture of male moths in Delta traps and infestation rate in fruits in the treated orchards in both years, and the differences were found to be statistically significant in comparison to the control. In the pheromone-treated orchards, the mean number of males (trap/week) was 0.91 ± 0.18 and 0.81 ± 0.19 in 2023 and 2024, respectively, while this was 11.38 ± 1.64 in 2023 and 19.60 ± 2.65 in 2024 in the control orchards. The mean infestation rate (%) in the pheromone-treated orchards was 1.18 ± 0.21% and 2.50 ± 0.43%, in 2023 and 2024, respectively. In contrast, this rate was 13.26 ± 1.08% and 15.33 ± 1.02% in the control orchards. In addition, it was determined that the total number of sprays for codling moth in orchards using mating disruption decreased by 44.4% and 45.4% in 2023 and 2024, respectively, in comparison with the control. As a result, this study revealed that the ISOCOD-C pheromone disperser can be successfully used against C. pomonella in apple orchards.