Recent prolonged wet weather and/or hail events have led to high Psa risk for some orchards. Copper and bactericides (where appropriate) should be applied as soon as possible after wounding events to reduce infection risk.
There are significant research efforts underway in New Zealand and Australia to develop more advanced control tools that will reduce the impact of Queensland fruit fly - kiwifruit’s number one biosecurity threat. An exciting new development this week is the launch of a female specific fruit fly trap in Australia. Currently our surveillance traps have used pheromones that attract only male flies so a female specific trap is a research priority.
Growers with green blocks at high risk of bud-rot infection should be applying a pre-flower girdle now to manage flower bud infection risk.
With the Kiwifruit Plant Certification Scheme becoming mandatory on October 1st, KVH is pleased to announce another nursery has joined the Scheme this week. Amber Nurseries in Cambridge is now selling KPCS “Full Certification” plants, joining 13 other nurseries from around New Zealand.
KVH has received reports of Psa symptoms from three Arguta orchards this week.
Leaf spot, blackened leaves and shoot collapse has been observed on two varieties and test results from Hills confirmed samples as Psa positive.