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Spring brings Psa symptoms
7 September 2017

As spring sap starts to flow and vines come out of winter dormancy, Psa symptoms will become more visible.

Spring is a high-risk season for Psa, and growers, particularly those on early sites, are recommended to start monitoring their vines to understand how Psa is unfolding on their orchards.

Focus on high-risk plants/areas, paying particular attention to areas where application of a full Psa spray programme has been compromised due to difficult or impossible ground conditions through the autumn and winter period.

Be sure to remove infected material promptly to reduce the risk of Psa spread.

Throughout spring, growers should focus on minimising leaf spot and flower bud infection and maintain copper cover, including Actiguard™ and consider CPPU products.

Reports from the Bay of Plenty, Franklin and Gisborne regions over the past fortnight indicate some Gold3 growers are seeing active cankers with incidence more widespread than last year. More symptoms have been reported for M91 males.  Some Waihi, Waikato, Whanganui and Hawkes Bay growers report symptoms extending across both male and female Gold3 vines.

Click here for a photo gallery of symptoms recently reported to KVH.

A reminder, growers can use the Psa-V Risk Model to help identify upcoming risk periods and to assist with the timing of protective sprays. Click here to register to use the model if you haven’t already.

The new Psa-V Seasonal Management Wall Chart 2017-18 is also a handy reference tool and is included in your latest Zespri Kiwiflier. It is also available to view or download from the KVH website. A key feature of the chart is the KVH Recommended Product List, which sets out the approved products for protection against Psa-V, their year-round application rates, and permitted use periods.

Kiwifruit Vine Health

Suite 3, Level 1, Customhouse Building
314 Maunganui Road, Mount Maunganui
(entrance cnr Totara and Rata Street)
PO Box 4246, Mount Maunganui, 3149
New Zealand

Tel:  0800 665 825
Fax: 07 574 7591