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Grower News
6 October 2016
KVH visits Wanganui orchards
6 October 2016
KVH travelled to Wanganui in September, visiting nine orchards over two days. A meeting was held to discuss Wanganui spray programmes compared to other regions and best practice Psa management over...
KVH visits Wanganui orchards
6 October 2016
KVH travelled to Wanganui in September, visiting nine orchards over two days. A meeting was held to discuss Wanganui spray programmes compared to other regions and best practice Psa management over spring. 
 
Most growers achieved good dry matter last season, enabling them to harvest crops in April - at least a month earlier than previous years. Actigard and copper had been applied post-harvest while leaves were still in good condition, which set the orchards up well going into winter. Overall the region experienced a milder winter with lower rainfall. 
 
Compared with last year, fewer Psa symptoms were seen, with one notable exception in Mangamahu Valley, where colder, wetter portions of an orchard were showing significant exudate. Growers have been proactive with monitoring and removal of infected material. Early indications are that bud break was looking good and growers were quietly confident of a good start to the season.
 
Company Notices
6 October 2016
Phd student at KVH
6 October 2016
KVH welcomed Stuart Woodcock to the team in August. Stuart is a PhD student from the John Innes Centre in Norwich, UK. He is working with KVH and Zespri on a three month...
Phd student at KVH
6 October 2016
KVH welcomed Stuart Woodcock to the team in August. Stuart is a PhD student from the John Innes Centre in Norwich, UK. He is working with KVH and Zespri on a three month secondment. 
 
His work investigates how bacteria are able to cause disease in humans and plants and he has previously worked with bacteria similar to Psa.  Stuart is using his time in New Zealand to review the recent research on Psa and gain insight into how the kiwifruit industry works. By the end of his secondment, he hopes to have identified any gaps in past research and will provide recommendations on future direction.
 

 

Biosecurity News
6 October 2016
Palm kernel ship no specific risk to kiwifruit
6 October 2016
The ship carrying palm kernel extract, anchored off the coast of Tauranga since 6 September after being prevented by MPI from unloading in Tauranga due to part of the consignment originating from an...
Palm kernel ship no specific risk to kiwifruit
6 October 2016

The ship carrying palm kernel extract, anchored off the coast of Tauranga since 6 September after being prevented by MPI from unloading in Tauranga due to part of the consignment originating from an un-approved Malaysian plant, poses no specific risk to kiwifruit.

KVH has previously investigated the risks of palm kernel imports to the kiwifruit industry and concluded that there are no direct threats involved with this trade. KVH fully supports MPI taking strong action such as this when they identify non-compliance at the border.

Grower News
6 October 2016
Gisborne grower meeting
6 October 2016
KVH will be holding a grower meeting tomorrow, Friday 7 October at 12.30pm, Greens Orchard - 799 Matawai Road to discuss the Gisborne regional Psa classification. This meeting will follow the OPC FON...
Gisborne grower meeting
6 October 2016

KVH will be holding a grower meeting tomorrow, Friday 7 October at 12.30pm, Greens Orchard - 799 Matawai Road to discuss the Gisborne regional Psa classification. This meeting will follow the OPC FON Field Day. 

Grower News
6 October 2016
Spring weather brings difficult conditions
6 October 2016
With the difficult spring weather conditions occurring in most regions, it is important growers take every opportunity to use a range of products within their spray programmes to minimise the risk of...
Spring weather brings difficult conditions
6 October 2016
With the difficult spring weather conditions occurring in most regions, it is important growers take every opportunity to use a range of products within their spray programmes to minimise the risk of Psa infection and spread.
 
For those in high Psa risk situations, current weather patterns are likely to warrant application of a bactericide. These are best applied before infection is seen and timed prior to infection events such as extended wet weather, stormy periods, hail or frost. Applications within 48 hours after these events also provides control. Timing for Kasumin is when leaves reach 25mm in diameter, with use allowed used until 21 days prior to flowering. KeyStrepto, with JA, can be used up to seven days before the first flower opens.  
 
Products such as Actigard and Ambitious should also be included for additional protection against leaf spot and flower bud infection. Most effective when applied before leafspot symptoms appear, optimal timings will vary with orchard location and variety.
 
First applications of Actigard can be made when leaves reach approximately 25mm in diameter. Delay applications if vines are under stress.
 
CPPU products, available for Green varieties only, need 5-7 days to raise a response and should be applied when there is sufficient leaf for absorption. As a guide, shoots should be around 100mm long.
 
Coppers at full summer rates remain the backbone of the spray programme and need to be reapplied to match the rate of shoot extension.
 
Pre-flower girdles for Green blocks at high risk of flower bud infection should also be planned.  These need to be applied in dry conditions, around 30 days before flowering.  
 
Use the Psa-V Risk model to assess upcoming risk for timing of spray applications.
 

 

Grower News
6 October 2016
Monitoring tips
6 October 2016
At this time of year, it is relatively simple to identify plants with possible Psa symptoms. It may be a little early for leaf spotting to be visible, although we have had a report this week of leaf...
Monitoring tips
6 October 2016
At this time of year, it is relatively simple to identify plants with possible Psa symptoms. It may be a little early for leaf spotting to be visible, although we have had a report this week of leaf spotting on a very early hi-caned Hayward orchard. Some growers on Psa-V positive G3 orchards are currently seeing exudate in buds and joints on their vines.
 
Generally, look out for canes with wilted/missing buds and then examine these closer to see the reason why this may have occurred. Some canes may just have delayed bud break, but on those with Psa, the buds will be mushy or may even be oozing. Red exudate may also be evident at cane joints or along the leader on older Hayward male varieties. 
 

 

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

Email: info@kvh.org.nz