Spring brings Psa symptoms

As spring sap begins to flow and vines come out of winter dormancy, Psa symptoms are being reported. Spring is a high-risk season for Psa, and growers are recommended to start monitoring vines to understand how Psa is unfolding on their orchards this spring. To date, some reports from around the regions include:

• Edgecumbe: exudate is being seen on some leader cankers and suckers retained as graft options.
• Waikato: sites previously affected by Psa are showing exudate in male and female buds.
• Hawkes Bay: some Psa positive sites are seeing symptoms on more plants – mainly younger vines in more stressed areas. Some Hayward and G3 symptoms are appearing worse than the same time last year.
• Waihi and Whanganui: both regions are showing spring symptoms.

Use the Psa-V Risk Model to help identify upcoming risk periods and to assist with timing of protective sprays. Click here to register for a login for the Psa-V Risk Model if you don’t already have one. Growers are invited to join a Zespri webinar on Wednesday 14 September at 4pm that will cover R&D projects, an update on resistance and best practice through spring. Full details, including instructions on how to join the webinar are available on the Zespri Canopy.