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Take care when applying copper
28 January 2016

Most growing areas are reporting reduced levels of Psa-V symptoms through January. This is expected as higher summer temperatures are less conducive to Psa-V spread.

However, wet periods add risk where Psa-V is present, particularly for young tissue. Trimming new male growth, and removing infected material from the canopy will reduce risk of Psa-V build-up.

The Psa-V Risk Model predicts risk associated with upcoming weather patterns and should be used to assess when additional protective coppers should be applied.

Be cautious of weather conditions when applying copper, as humidity can impact on drying and slow drying increases risk of phytotoxicity.  Ideally, also avoid tank mixing copper with other products.

Kiwifruit Vine Health

25 Miro St
Mount Maunganui
Tauranga 3116

Tel:  0800 665 825
Fax: 07 574 7591

Email: info@kvh.org.nz