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Grower News
23 October 2014
Avoid below-label use of Psa-V products
23 October 2014
Using products at lower than the recommended label rates can increase the risk of resistance developing, and has been implicated as a factor in cases of resistance to disease in other crops. Given...
Avoid below-label use of Psa-V products
23 October 2014

Using products at lower than the recommended label rates can increase the risk of resistance developing, and has been implicated as a factor in cases of resistance to disease in other crops.

Given the limited control options available, it is important the kiwifruit industry use the tools that are available appropriately. This will maximise the useful life of the products. To reduce the risk of resistance, it is very important that the label instructions, including label rates are followed.

On-going use of products outside label recommendations risks ACVM reviewing copper label approvals.

The use of KeyStrepto™ at less than label rates is illegal, and must not occur in any circumstances.

Growers who are concentrate spraying need to adjust product rates to ensure correct rates are applied.

Grower News
23 October 2014
Leaf spot season
23 October 2014
Low levels of leaf spotting within some orchards in the Bay of Plenty region have been reported over the last week. Sepal browning is being reported for some blocks historically vulnerable to bud...
Leaf spot season
23 October 2014

Low levels of leaf spotting within some orchards in the Bay of Plenty region have been reported over the last week. Sepal browning is being reported for some blocks historically vulnerable to bud infection. Leaf spot symptoms are traditionally seen this time of year—often appearing after periods of wet weather and particularly if these are also associated with wind and cold conditions.

Research has shown that a good protective spray programme helps minimise leaf spot symptoms, reducing inoculum build-up within orchards. Maintain copper cover, and in high-risk situations the use of KeyStrepto™, is highly recommended at this time to avoid build-up of orchard inoculum levels.  Actigard™ provides further support by eliciting the vine’s defence system through this critical pre-flowering period.

Growers intending to trunk girdle as an additional tool against flower bud and flower infection are recommended to leave some un-girdled vines, to allow measurement of the value of this tool on their individual site. Click here for Zespri’s methodology on the Canopy.
 

Grower News
23 October 2014
Tri-base Blue and Champ DP removed from recommended product list
23 October 2014
Copper protectant products Tri-Base Blue® and Champ™ DP have been removed from KVH’s recommended product list (below) as their use period from post-harvest to leaf-fall and then...
Tri-base Blue and Champ DP removed from recommended product list
23 October 2014

Copper protectant products Tri-Base Blue® and Champ™ DP have been removed from KVH’s recommended product list (below) as their use period from post-harvest to leaf-fall and then through dormancy has ended. 

Grower News
23 October 2014
Good result following North-West Auckland monitoring
23 October 2014
Last week KVH completed a round of monitoring in the North-West Auckland region. The region is currently classified as an Exclusion region with a Controlled Area in place. Seven orchards were...
Good result following North-West Auckland monitoring
23 October 2014

Last week KVH completed a round of monitoring in the North-West Auckland region. The region is currently classified as an Exclusion region with a Controlled Area in place.

Seven orchards were inspected and samples were taken from three orchards. All tests were confirmed ‘Not Detected’.

There is one positive orchard in the region—confirmed in November 2013. The Hort16A on this orchard was removed immediately following the positive test and stump-grafted to Gold3.There are no signs of further Psa-V infection on this orchard.

North-West Auckland growers are maintaining good protectant programmes hygiene. Only one Hort16A orchard remains and this has been notch-grafted to Gold3.
 

Biosecurity News
23 October 2014
Cancellation of Rotorua international flights
23 October 2014
The cancellation of trans-Tasman international flights in and out of Rotorua Airport means there is one less biosecurity risk pathway into New Zealand. Since the trans-Tasman flights started in...
Cancellation of Rotorua international flights
23 October 2014

The cancellation of trans-Tasman international flights in and out of Rotorua Airport means there is one less biosecurity risk pathway into New Zealand.
Since the trans-Tasman flights started in 2009, Rotorua Airport has been a potential entry pathway for biosecurity risks into New Zealand. Of particular concern was the risk of importing Queensland Fruit Fly from Australia directly into the Bay of Plenty.

Last year KVH completed a preliminary review of border interventions at Rotorua Airport to ensure potential biosecurity risks to the kiwifruit industry were being managed appropriately. While KVH was satisfied with the level of biosecurity intervention on this pathway, the cancellation of the flights eliminates this risk altogether and enables MPI resources to be applied to managing other pathways.

Rotorua Airport will cancel its international air service from the end of April 2015.

  • Click here to read the full article in the Rotorua Daily Post
  • Click here to read the preliminary review by KVH last year
  •  
Protocols & Movement Controls
23 October 2014
Pollen providers and distributers to register with KVH
23 October 2014
Pollination is the next key activity on the kiwifruit calendar and movement controls apply for both pollen and beehives. All pollen providers and distributors of pollen are required to register with...
Pollen providers and distributers to register with KVH
23 October 2014

Pollination is the next key activity on the kiwifruit calendar and movement controls apply for both pollen and beehives.

All pollen providers and distributors of pollen are required to register with KVH and growers should only be sourcing pollen from these registered providers—click here for the registered lists.

For more information about pollination movement controls and/or to register with KVH please visit www.kvh.org.nz/beekeepers.
 

Grower News
16 October 2014
Flower bud infection symptoms in high-risk Hayward orchards
16 October 2014
Symptoms of female flower bud infection are being seen on some Hayward orchards which suffered bud-rot in previous years. Brown discolouration of sepals and fine droplets of moisture on the surface...
Flower bud infection symptoms in high-risk Hayward orchards
16 October 2014

Symptoms of female flower bud infection are being seen on some Hayward orchards which suffered bud-rot in previous years. Brown discolouration of sepals and fine droplets of moisture on the surface of the buds are likely indications of Psa-V presence. These symptoms may not necessarily have obvious leaf spot associated with them. Within the same blocks, presence of red exudate on terminal buds, collapsed shoots and infected buds on the ends of female canes are other signs of Psa-V.

Growers are recommended to preferentially remove infected buds in pre-flower thinning rounds, cut back infected canes, continue with a protective spray programme and consider a pre-flowering girdle to help with bud-rot control.

Recommended timing for a pre-flower girdling for bud-rot control is 16-30 days pre-flowering so growers should plan for this now.

All growers are urged to measure impacts of this treatment on their site. Leave some control vines amongst girdled areas or alternatively, girdle only a few vines within high-risk blocks and measure flower-to-fruit retention for treated and control vines. A methodology to assist growers has been developed by the Zespri OPC team.

Tool hygiene is essential when pruning and/or girdling within these blocks.

Protocols & Movement Controls
16 October 2014
Unmanaged orchards
16 October 2014
Last week KVH followed up on two reports of unpruned orchards within the Te Puke region. Removal of vines was nearing completion on one property and the lease status of the second is being followed...
Unmanaged orchards
16 October 2014

Last week KVH followed up on two reports of unpruned orchards within the Te Puke region. Removal of vines was nearing completion on one property and the lease status of the second is being followed up.

Rules within the NPMP require completion of winter pruning (cutting and tying down of vines) by 1 October each year. Growers or concerned parties should contact KVH for follow-up of suspected unpruned or unmanaged blocks. NPMP rules are in place to reduce the risk of blocks harbouring Psa-V and providing risk to neighbouring orchards.

Grower News
16 October 2014
Male management
16 October 2014
Growers should monitor their male vines for Psa-V infection and work to remove or reduce cankers where they occur. Cankers are Psa-V inoculum sources and create infection risk for male and female...
Male management
16 October 2014

Growers should monitor their male vines for Psa-V infection and work to remove or reduce cankers where they occur. Cankers are Psa-V inoculum sources and create infection risk for male and female flower-buds. Infected male flowers can result in insufficient male pollen supply within the orchard and severely impact on orchard productivity.  Where male plants are showing infection, assess pollen needs and make arrangements with your pollen provider now. Indications are that pollen availability is low this season.

Grower News
16 October 2014
Monitoring confirms Whangarei Exclusion status
16 October 2014
In early October, KVH staff completed a round of monitoring on six Whangarei orchards to confirm the region’s ‘Exclusion’ status.  The orchards were chosen to represent the...
Monitoring confirms Whangarei Exclusion status
16 October 2014

In early October, KVH staff completed a round of monitoring on six Whangarei orchards to confirm the region’s ‘Exclusion’ status. 

The orchards were chosen to represent the region with the focus on Hort16A plantings due to their higher susceptibility to Psa-V.

Samples taken from two CK3 males showing Psa-V like symptoms on one orchard were tested and confirmed ‘Not Detected’. There were no other visible signs of Psa-V symptoms on the other orchards.

A review of the 2014 season spray diaries showed four of the six orchards had good protective spray programmes in place and all orchards had good hygiene protocols in place. The growers had plans to convert their Hort16A blocks to less susceptible varieties; and some had begun this process by stump or notch grafting some of their Hort16A blocks to Gold3.

Due to Whangarei’s close proximity to Kerikeri (a containment region where Psa-V has spread this season) it’s essential Whangarei growers remain proactive with their protective spray programmes and hygiene practices to continue to keep Psa-V out of their region.

A report of the Whangarei monitoring will be available on the KVH website shortly.

Grower News
16 October 2014
French Psa-V update
16 October 2014
France is one of the largest kiwifruit production countries in Europe, and like most kiwifruit production regions is infected with the global outbreak strain of Psa-V (r Biovar 3). As at autumn...
French Psa-V update
16 October 2014

France is one of the largest kiwifruit production countries in Europe, and like most kiwifruit production regions is infected with the global outbreak strain of Psa-V (r Biovar 3).

As at autumn 2013, France had about 4400 hectares planted in the following cultivars:

  • 4020 ha Hayward
  • 165 ha Summerkiwi
  • 20 ha other green varieties
  • 25 ha Hort16A
  • 70 ha Gold3
  • 40 ha other gold varieties
  • 35 ha Arguta

Estimates of total Psa-V infection rates are difficult to obtain. The French Ministry of Agriculture provides official data at the annual Psa meeting each February for the previous year.  Therefore, 2013 data is the latest official data available.

In 2013, 2344 hectares of kiwifruit were officially inspected for Psa with 123 samples returning positive results (out of 400 taken from orchards with symptoms). This represents 386 canopy hectares or 8.9 percent of the total industry.

However reports based on visual inspections since 2011 suggest the cumulated infection rate is much higher—around 50 percent.  Since 2011, four percent of the orchards have been cut back or removed.

Data from 2014 survey will be released in February 2015 and KVH will report these when they become available.
 

Biosecurity News
16 October 2014
KVH participates in MPI fruit fly working group
16 October 2014
MPI have established a working group to improve and clarify the requirements for managing the risk of fruit fly entering through the commercial fresh produce pathway. Although the commercial...
KVH participates in MPI fruit fly working group
16 October 2014

MPI have established a working group to improve and clarify the requirements for managing the risk of fruit fly entering through the commercial fresh produce pathway.

Although the commercial produce pathway is considered to be well managed and relatively low risk, MPI has identified several pieces of work necessary to maintain a high level of biosecurity risk management.

The group will review work being undertaken and communicate progress back to respective industries on an on-going basis. KVH is participating in this group along with representatives from other New Zealand horticultural industries.

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