Monitoring codling moth resistance to Cydia pomonella granulovirus (CpGV) in organic fruit growing in Germany

Cydia pomonella granulovirus (CpGV) products are indispensible for an efficient and environmentally friendly control of codling moth (Cydia pomonella) in organic apple and pear production. Since the first occurrence of field resistance against commercial CpGV products, intensive research was initiated to understand the mechanism of resistance and to identify new CpGV isolates with resistance-breaking traits. Such resistance-breaking CpGV isolates can be used to provide solutions for orchards affected by CpGV resistance as well as to develop resistance management strategies. Here, we report the current status of 15 years of CpGV resistance monitoring in Germany.