Developing a management strategy based on the relationships between brown rot and codling moth in two apple production systems

Abstract Brown rot (BR) in relation to codling moth damage (CMD) is a key issue apple production but the impact of these pests has not been assessed jointly. In addition, categorising cultivar reaction two for sustainable systems could be essential improving pest management. Therefore, 12-year study, 27 cultivars (9 scab-resistant, 9 commercial, and old) were their reactions BR CMD integrated organic systems, classified into 3 categories (“low”, “medium”, “high”) based on season-long incidences. Then temporal progresses each category analysed by fitting three-parameter logistic functions process data then deriving 5 model variables Here, we showed BR-CMD relationships both which indicated that final incidences significantly higher systems. Our results show “low” most resistant cultivars, “medium” or “high” commercial old ones. The area under disease progress curves consistent differences among all systems; they used differentiate CMD. Based relationships, here developed new brown forecasting management strategy (BRCM-FMS). BRCM-FMS general programme (GPMP) compared an additional 4-year study. This was first study reduced annual spray applications 21.4–41.7% 12.5–31.3% system GPMP. Disease programmes similar years, classification categories. Less sprays provide economic environmental benefits growers.