Occurrence of the moth Cydia pactolana is associated with the spruce canker fungus Neonectria fuckeliana

Anne Uimari, Kari Heliövaara, Katalin Tuba, Marja Poteri, Martti Vuorinen
2018 Scandinavian Journal of Forest Research  
Several young damaged Norway spruce stands in eastern and central Finland were observed from 2013 to 2016. The damage included trees with heavy resin flow, necrotic foliage, stem and branch cankers and dead trees. Pest identification resulted in the tortricid moth Cydia pactolana whose occurrence was always associated with the presence of the ascomycete pathogen Neonectria fuckeliana. Both the insect and the disease contributed to the extent of the damage, but it is not possible to say in which
more » ... ble to say in which order they had attacked the trees. Apparently, changed climate has affected the increased occurrence of both the fungus and the moth. However, the characteristics of the insect-fungus interaction and the factors contributing to the coincidences are unknown. Emerging coexistence or potential symbiosis of the two damaging agents is a serious threat for Norway spruce cultivation. Understanding the biology of this fungus-insect interaction is important for controlling them. ARTICLE HISTORY
doi:10.1080/02827581.2018.1427791 fatcat:suuixurb55gcjmhhjq5gjhcm3i