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R&D News
9 October 2014
New R&D report on KVH website
9 October 2014
Exploring options for wound protection to prevent Psa-V infection of cut stems Bruno seedlings Wound protection continues to be a challenge for kiwifruit growers since the incursion of a virulent...
New R&D report on KVH website
9 October 2014

Exploring options for wound protection to prevent Psa-V infection of cut stems Bruno seedlings

Wound protection continues to be a challenge for kiwifruit growers since the incursion of a virulent strain of Pseudomonas syringae pv. actinidiae (Psa) in New Zealand in November 2010. When several products were tested in the field as wound protectants against natural infection by Psa, there were no significant differences between treatments (Miller et al. 2012). Therefore, there is demand in the kiwifruit sector for a wound protectant suitable for pruning wounds. This project evaluates a range of registered treatments not previously tested for protecting pruning wounds against Psa and explores the use of a penetrant for driving the product into the wound to provide protection in the case of bacteria entering the plant during the cutting process.

Click here for report by Plant & Food Research

Grower News
2 October 2014
R&D grower meeting - presentations available on KVH website
2 October 2014
The following presentations from Tuesday’s R&D grower meeting in Te Puke are now available on the KVH website:   Psa-V Spring Update—Barry O’Neil, KVH Leaf...
R&D grower meeting - presentations available on KVH website
2 October 2014
Grower News
2 October 2014
Kerikeri Update
2 October 2014
Psa-V continues to spread throughout the Kerikeri region with 32 out of 106 KPINS now testing Psa-V positive. KVH staff recently visited positive orchards in Kerikeri with growers and orchard...
Kerikeri Update
2 October 2014

Psa-V continues to spread throughout the Kerikeri region with 32 out of 106 KPINS now testing Psa-V positive. KVH staff recently visited positive orchards in Kerikeri with growers and orchard management staff.

In most cases disease expression has continued to be relatively slow. However, in one location inoculum levels have clearly increased and disease expression in Hort16A has increased significantly. This has led to a number of part blocks being removed. These orchards are carrying out weekly monitoring and removal of infected material, followed by weekly spraying.

Growers are advised to be aggressive with removal to help reduce the rate of spread and to protect young Gold3 grafts. The continued wet weather has clearly been a factor in disease spread, and unless the region sees a long period of warm, dry weather soon, growers can expect expression to continue to accelerate.

KVH recommends growers actively monitor their orchards, remove signs of infection and to contact packhouses or KVH staff for support if required.
 

Grower News
2 October 2014
Chilean update
2 October 2014
In late 2013, Chile suffered one of its most damaging frost events in 80 years—causing almost $1 billion damage to fruit crops and reducing kiwifruit export volumes by over 50%. Further...
Chilean update
2 October 2014

In late 2013, Chile suffered one of its most damaging frost events in 80 years—causing almost $1 billion damage to fruit crops and reducing kiwifruit export volumes by over 50%.

Further impacts from this frost event are also expected in the form of Psa-V, with the number of positive orchards expected to increase when national surveys are carried out later this year. It is expected the colder areas near the mountains and further from the coast will be the most severely affected.

Over the past few years, Chile has seen a steady increase in the number of positive orchards as shown in the graph above.

Symptoms at newly-detected orchards are often severe, leading local authorities to believe these infections are not new, but have been undetected in previous monitoring rounds.

The Chilean Kiwifruit Committee states the industry needs a greater permanent awareness to biosecurity, and orchard management complacency is the biggest problem facing the Chilean industry.

Company Notices
2 October 2014
Zespri FON field days - 7-21 October
2 October 2014
Zespri’s Focus Orchard Network (FON) field days are scheduled from 7-21 October and include the following topics: Taste – setting crop loads for Gold3, and early season canopy...
Zespri FON field days - 7-21 October
2 October 2014

Zespri’s Focus Orchard Network (FON) field days are scheduled from 7-21 October and include the following topics:

  • Taste – setting crop loads for Gold3, and early season canopy management
  • Pollination – optimising the tools you already have available
  • Psa-V – key spring management tools


Click here to find the FON field day coming to your area

Grower News
2 October 2014
Observation on male vines
2 October 2014
During spring, Psa-V symptoms can change quickly as sap rises. Therefore, ongoing monitoring of orchards is essential at this time of year. Monitoring of male vines, particularly in areas where...
Observation on male vines
2 October 2014

During spring, Psa-V symptoms can change quickly as sap rises. Therefore, ongoing monitoring of orchards is essential at this time of year.

Monitoring of male vines, particularly in areas where males were affected by Psa-V in previous years, is recommended to allow growers to make early assessments of likely artificial pollination needs.  Pollen suppliers have indicated stocks are lower than in past years.

Following recent orchards visits, KVH has prepared the following observation reports:

 

 

Grower News
2 October 2014
CPPU product recieves limited label claim
2 October 2014
Last month, ACVM granted a limited label claim to a second CPPU (forchlorofenuron) product – Caplit™ – for the control of Psa-V in kiwifruit. Zespri has updated the CPPU User...
CPPU product recieves limited label claim
2 October 2014

Last month, ACVM granted a limited label claim to a second CPPU (forchlorofenuron) product – Caplit™ – for the control of Psa-V in kiwifruit.

Zespri has updated the CPPU User Guide and Crop Protection Standard to reflect this change; and KVH has included Caplit™ in its Recommended Product List.

The use conditions are the same for both Caplit™ and Ambitious® 10SL, so growers are prompted to add Caplit™ to their Seasonal Management Wall Chart alongside Ambitious® 10SL. Please note the rate for Caplit™ is 50-75g/100l.

Due to concerns around fruit deformation observed on Gold varieties off-shore, CPPU products should not be applied to Gold varieties.
CPPU products are not systemic and therefore good coverage is required. Apply approximately 5–7 days prior to an infection event. CPPU should not be applied within seven days of the first flowers opening on an orchard. Extreme care should be taken to mitigate the risk of spray drift.
 

Company Notices
25 September 2014
R&D Grower Update meeting - 30 September
25 September 2014
KVH will present a Psa-V spring update at next week’s R&D grower meeting in Te Puke. This will include a national Psa-V update and infection management advice. When:    ...
R&D Grower Update meeting - 30 September
25 September 2014

KVH will present a Psa-V spring update at next week’s R&D grower meeting in Te Puke. This will include a national Psa-V update and infection management advice.

When:     3pm, Tuesday 30 September
Where:     The Orchard Church, Te Puke
Agenda:    

  • Introduction—Dave Tanner, Zespri
  • KVH  Psa-V spring update—Barry O’Neil, KVH
  • Leaf spotting/update on risk model/track plants year 1—Greg Clark, Zespri
  • Management of flower and fruit drop in Green varieties—Greg Clark, Zespri
  • Research areas underway expected to deliver meaningful results in the next 12 months—Dave Tanner, Zespri
  • Q&A session
Grower News
25 September 2014
Copper product receives BioGro certification
25 September 2014
Last week, Grosafe Chemicals Ltd confirmed their copper Hydroxide product Hortcare® Copper Hydroxide 300 received BioGro certification, providing organic growers with another tool in the fight...
Copper product receives BioGro certification
25 September 2014

Last week, Grosafe Chemicals Ltd confirmed their copper Hydroxide product Hortcare® Copper Hydroxide 300 received BioGro certification, providing organic growers with another tool in the fight against Psa-V.

Zespri will include this change when they update the Crop Protection Standard.

As always, organic growers are reminded to confirm the BioGro status of all products prior to use, and ensure their ‘BioGro Organic Management Plan Inputs’ list remains updated.

Grower News
25 September 2014
Symptom expression in cold orchard locations - Waikato observation report
25 September 2014
Orchard sites that experienced colder autumn and winter periods are reporting a higher incidence of Psa-V symptoms this spring. Wanganui, Waikato, and Waihi sites, which experienced frosts shortly...
Symptom expression in cold orchard locations - Waikato observation report
25 September 2014

Orchard sites that experienced colder autumn and winter periods are reporting a higher incidence of Psa-V symptoms this spring.

Wanganui, Waikato, and Waihi sites, which experienced frosts shortly after harvest and also had a number of frost events with temperatures below zero for extended periods, are reporting increased levels of symptoms in Hayward males including Chieftan.

Late growth which was not fully mature, or growth that was damaged through autumn storms, is showing higher incidence of secondary symptoms.

Growers are recommended to particularly focus on colder areas of their orchard when monitoring to determine individual orchard impacts.

  • Click here to view the observation report on a Waikato Hayward and Gold3 orchard.
Grower News
25 September 2014
Future pollination supplies
25 September 2014
This week KVH held a meeting with pollen providers. Available pollen across the industry is around 50 percent lower than last year (which was not a good year for pollen). This could potentially cause...
Future pollination supplies
25 September 2014

This week KVH held a meeting with pollen providers. Available pollen across the industry is around 50 percent lower than last year (which was not a good year for pollen). This could potentially cause problems with supply for 2014 if male vines are compromised due to Psa-V infection.

Growers are urged to have their early male flowers picked for pollen and if possible, support pollen providers by supplying flowers and labour. Contact your local pollen provider if you are able to help the industry build up supplies. Click here for a list of registered pollen providers on the KVH website.

All those intending to operate a pollen mill this season are required to register with KVH here.

Biosecurity News
25 September 2014
Industry Operational Working Group for Fruit Fly Preparedness
25 September 2014
As advised in the KVH Bulletin (24 April), the Plant Market Access Council (PMAC) including Zespri and KVH have been working on a project which aims to pre-emptively agree market access conditions...
Industry Operational Working Group for Fruit Fly Preparedness
25 September 2014

As advised in the KVH Bulletin (24 April), the Plant Market Access Council (PMAC) including Zespri and KVH have been working on a project which aims to pre-emptively agree market access conditions with key markets in the event of future incursions of significant fruit fly species in New Zealand.

The project includes developing protocols which demonstrate how New Zealand will manage a fruit fly incursion and how exporters will therefore be able to reliably export fruit fly free product minimising any trade disruptions.

For trading partners to agree to these protocols, which if a breeding population of fruit fly is found would be based on cold disinfestation of fruit, the industry must be able to demonstrate their own procedures for implementing any agreed protocols.

Therefore, ISG has recently agreed to establish a small industry working group to identify and address associated operational issues.

The objectives for this working group will be to:

  • Identify the key issues and the range of possible scenarios that need to be considered and planned for depending on what the nature of the fruit fly outbreak is, and what time of year it happens in.
  • Develop a set of guidelines to assist individual post-harvest operators to develop their own documented quality management plan for approval by MPI should cold disinfestation of fruit be required by our markets.
  • Discuss the guidelines with MPI for comment and agreement prior to publishing these to the wider industry.

It is essential for our industry to plan for what would need to be implemented, often at very short notice, in order to minimise market disruptions.

It’s important to note that while MPI are beginning the negotiations, it will likely take years for some countries to agree to these protocols.

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