During 2018, there were ZERO new reports of AYLS being either ABSENT or PRESENT, just two reports from Oregon that were revised to PRESENT. In order to identify the cause, it is necessary to have a clear idea of where AYLS is ABSENT or PRESENT, so if you grow Actinidia vines (especially the Hardy Kiwi Actinidia arguta) in your garden or commercially, or know of someone who does in areas that have few or no reports such as California or States other than Washington, Canadian Provinces, European and Asian Countries, and the entire Southern Hemisphere, Please file a report using the form on the Map of AYLS Locations Worldwide page after your location reaches 1,500 Degree Days (using a base of 41 degrees Farenheit) per the following link or a similar model available for your location:
AYLS first appears each year on leaves that are mature by the time the 1,500 Degree Days have accumulated. Is AYLS caused by a disease, soil disorder, environmental condition, or some other factor? Only accurate reporting from around the World and testing of samples by those who have the ability to identify causes that don’t show using common Bacterial, Fungal, and Viral pathogen tests will lead to an answer!
Bob Glanzman, Seattle, WA, USA