The diagnostic service, Grow Help Australia, received 331 samples from 76 production nursery businesses over the past six months. 44 of these businesses had not submitted samples to Grow Help previously during NY20000 (during the last 2.5 years). Communications to promote this free service continue in each pest of the month, state Nursery and Garden communication channels, GIA e-news articles and other project outputs.
A number of post plant case studies are being conducted to determine if high health nurseries produce plants with fewer pests, diseases and non-pathogenic disorders. We currently have three such trials being completed on landscape plants (started September 2022), avocados (started May 2023) and macadamias (started Dec 2022). One additional trial is currently being planned for planting by spring of 2023. These trials have been very large and, combined with the high workload from diagnostic samples submitted, produced delays in completing pest and disease factsheets.