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Best practice management of potential copper tolerance
25 June 2015
Results from KVH’s latest round of resistance testing show the importance of applying copper at the correct label rates for effective Psa control. In lab tests, Psa-V samples from 5 of 56 KPINS...
Best practice management of potential copper tolerance
25 June 2015

Results from KVH’s latest round of resistance testing show the importance of applying copper at the correct label rates for effective Psa control. In lab tests, Psa-V samples from 5 of 56 KPINS tested in the wider Bay of Plenty Region showed some growth  when a 15% concentration of copper was applied. It is concerning to see possible signs of tolerance to one of our key tools for fighting Psa-V.

What is being done?        
KVH is carrying out further work to establish the nature of the tolerance, including re-sampling and further sampling from the five orchards. KVH is working with scientists to quantify the level and develop a recommended programme to monitor and manage the issue going forward.

KVH will work with orchard owners where tolerance or resistance has been identified to ensure best practice management is in place. This includes removal of infected material, the application of sprays at label rates, alternating spray products, movement restrictions on plant material and a strong focus on orchard hygiene.

Through the R&D and product testing programme Zespri and KVH are continuing to look for alternative and sustainable control approaches for Psa-V.

What can growers do?
KVH recommends growers remain proactive and maintain a year-round comprehensive Psa-V management programme. This includes monitoring, removing signs of Psa-V, applying protective sprays at label rates, and alternating protectant spray products where possible. It is also very important to maintain orchard hygiene to reduce the potential for resistant Psa to enter your orchard, or spread within if present.
 

Winter field-day round
25 June 2015
The recent Zespri winter FON rounds were well supported by growers. KVH provided a short hand-out summarising key points to protect orchards against Psa-V through winter. Click here for a copy...
Winter field-day round
25 June 2015

The recent Zespri winter FON rounds were well supported by growers. KVH provided a short hand-out summarising key points to protect orchards against Psa-V through winter.

  • Click here for a copy of the KVH hand-out.
Importation of sterile Queensland Fruit Flies for research
25 June 2015
Plant and Food Research were recently granted permission to import sterile Queensland fruit flies (QFF) into a New Zealand containment facility to develop new attractants for female and male flies....
Importation of sterile Queensland Fruit Flies for research
25 June 2015

Plant and Food Research were recently granted permission to import sterile Queensland fruit flies (QFF) into a New Zealand containment facility to develop new attractants for female and male flies. The project will determine what the flies can smell and if these odours can be used to improve the sensitivity of traps or increase the numbers of flies lured in.  Three approaches will be used; odours based on host fruit, sex pheromones and bacteria.

This research is part of a larger collaborative approach with Australian organisations to manage and eradicate QFF populations. One of these collaborations is the SITPlus partnership, a five year $22 million R&D partnership using Sterile Insect Techniques (SIT). Supporting these research activities, is the development of a SIT facility that is capable of producing 50 million sterile QFF per week as an eradication tool for release in Australia or New Zealand should an established population ever become larger enough for this to be required. A brochure on the SITPlus project can be found here.

KVH supports these research activities as an integral component of our readiness activities for the industry’s most unwanted biosecurity threat.

Matt Dyck, KVH Biosecurity

KVH presents biosecurity to students
25 June 2015
Yesterday KVH presented the importance of NZ biosecurity to more than 170 high school students at ‘Cultivate Your Career’ – an event that ran concurrently with the Bay of Plenty...
KVH presents biosecurity to students
25 June 2015

Yesterday KVH presented the importance of NZ biosecurity to more than 170 high school students at ‘Cultivate Your Career’ – an event that ran concurrently with the Bay of Plenty Young Fruit Grower competition at Mills Reef Winery.

High school students from the Bay of Plenty and Waikato learned about New Zealand’s biosecurity history, the importance of protecting New Zealand’s unique environment and the potential impact of unwanted pests and diseases on both horticulture production and the environment.

They were also introduced to the Brown Marmorated Stink Bug (BMSB) including what it looks like, how it can get here, its potential impacts should it arrive and establish in New Zealand and what to do if they suspect they have found one.

They were also asked to create a poster or advertisement about the BMSB with the aim of educating other school students about it. Entries close in two weeks and KVH will publish the winning entry.

Students were very engaged during the sessions, with some asking about careers in biosecurity and the horticulture industry.

Lara Harrison, KVH Communications

Bi-monthly R&D update report - April/May 2015
25 June 2015
This bi-monthly report provides information about the progress over April and May 2015 for the Psa R&D programme. The following projects are summarised in the report: Survival of...
Bi-monthly R&D update report - April/May 2015
25 June 2015

This bi-monthly report provides information about the progress over April and May 2015 for the Psa R&D programme. The following projects are summarised in the report:

  • Survival of Pseudomonas syringae pv. actinidiae on plastics coated with or containing an antimicrobial compound.
  • Best practice for protectant spray coverage of spring and summer kiwifruit canopies

Click here to read the report.

Lara Harrison, KVH Communications

New R&D report - best practice for protectant spray coverage of spring and summer kiwifruit canopies
25 June 2015
Optimising copper use for sustainable control of Psa in kiwifruit orchards—this study was undertaken to build on previous work to develop best practice recommendations for protective sprays for...
New R&D report - best practice for protectant spray coverage of spring and summer kiwifruit canopies
25 June 2015

Optimising copper use for sustainable control of Psa in kiwifruit orchards—this study was undertaken to build on previous work to develop best practice recommendations for protective sprays for kiwifruit. In particular, it was to determine (1) for how long low-drift air inclusion AI nozzles could efficiently deliver protectant sprays to expanding spring canopies; and (2) to maximise the efficiency of spray delivery to flowering Hayward and fully expanded Gold3 canopies on wide row spacings.

Click here to read the report.

Lara Harrison, KVH Communications

Budwood movement
11 June 2015
Budwood movement will be a focus for many suppliers and growers at this time of year. Please remember: All suppliers of budwood must be registered with KVH and supply a copy of their Psa-V...
Budwood movement
11 June 2015

Budwood movement will be a focus for many suppliers and growers at this time of year. Please remember:

  • All suppliers of budwood must be registered with KVH and supply a copy of their Psa-V Risk Management Plan – Budwood  www.kvh.org.nz/indgrafters
  • Growers receiving budwood must only obtain budwood from a KVH registered supplier. NB: Growers supplying Zespri with budwood for their budwood programme have been registered by Zespri and are covered by Zespri’s Risk Management Plan, a copy of which is held by KVH.
  • Budwood movement must comply with the  controls outlined in KVH Protocol: Budwood
  • Budwood movement from Psa-V positive orchards is only allowed in Recovery regions – NB: movement between Recovery regions requires KVH authorisation.
  • Monitoring, sampling and testing must occur within six weeks of budwood collection.
  • Budwood collection area to be sprayed with copper within four weeks of collection.
  • Tool hygiene and sanitising must be maintained.
  • Records of budwood supplied and received must be maintained and kept with grower GAP records.

Karyn Lowry, KVH Operations

Chile update
11 June 2015
Harvest is underway in Chile with many growers still seeing lower volumes as they recover from the devastating spring frosts in September 2013. This frost resulted in around 60 percent reduction in...
Chile update
11 June 2015

Harvest is underway in Chile with many growers still seeing lower volumes as they recover from the devastating spring frosts in September 2013. This frost resulted in around 60 percent reduction in Chilean export in 2014.

On Psa-V affected orchards, growers are seeing high levels of canker and dieback in Hayward. Hayward comprises more than 95 percent of kiwifruit plantings in Chile.

Psa-V is established in the Biobio, Maule and O’Higgins regions and appears to be progressing north. Psa-V has recently been confirmed in Chimarongo, which is around 25 kilometres north of the last mapped point.

SAG (Servicio Agricola Y Ganadero – the equivalent to NZ’s Ministry for Primary Industries) release their annual Psa statistics at the end of each year. 

The Chilean Kiwifruit Committee met recently to review their recommendations to Chilean growers for Psa-V disease control and now include recommendations for products and rates for disease control. The recommended copper rates are higher than in New Zealand. The Committee intends to carry out research to determine minimum effective dosage under local conditions.

In Chile kiwifruit is typically one of a number of crops on a property. Other crops might include apples, table grapes, nectarines, cherries, walnuts, hazelnuts, plums and almonds. Soils are often heavy and a reasonable number of kiwifruit plantings are on raised ridges.

Photo credit: Lynda Hawes







 

New R&D report - quality testing of compost samples
11 June 2015
A trial was undertaken by Kawerau-based Plateau Bark to see if compost could be made using reject fruit (and associated debris) mixed with pulp waste from the Norske Skog Tasman Ltd pulp and paper...
New R&D report - quality testing of compost samples
11 June 2015

A trial was undertaken by Kawerau-based Plateau Bark to see if compost could be made using reject fruit (and associated debris) mixed with pulp waste from the Norske Skog Tasman Ltd pulp and paper mill.

The compost tested 'not detected' for Psa-V and kiwifruit seed was destroyed during the composting process.

John Mather, KVH Biosecurity

Biosecurity No.1 concern amongst agribusiness industry leaders
11 June 2015
KPMG have just released the 2015 Agribusiness Agenda and a world-class biosecurity system has been rated the number one priority by agribusiness industry leaders for the third consecutive...
Biosecurity No.1 concern amongst agribusiness industry leaders
11 June 2015

KPMG have just released the 2015 Agribusiness Agenda and a world-class biosecurity system has been rated the number one priority by agribusiness industry leaders for the third consecutive year.

Scores indicate that biosecurity is even more important now than in 2014.  The report states increasing global connectivity makes it critical to continuously reassess the most robust, cost effective biosecurity solutions for New Zealand; and the Biosecurity 2025 strategy review is a prime opportunity to bring some fresh collaborative thinking to biosecurity.

Over the coming weeks the first Biosecurity 2025 working group sessions will take place with KVH participating to ensure that the interests of our industry are included in the strategy.

Matt Dyck, KVH Biosecurity

KVH biosecurity focus at Mystery Creek Fieldays
11 June 2015
KVH has a small stand at the Mystery Creek Fieldays and this year’s focus is on biosecurity. The stand displays real specimens of some of our most unwanted pests, including the Queensland Fruit...
KVH biosecurity focus at Mystery Creek Fieldays
11 June 2015

KVH has a small stand at the Mystery Creek Fieldays and this year’s focus is on biosecurity. The stand displays real specimens of some of our most unwanted pests, including the Queensland Fruit Fly and the Brown Marmorated Stink Bug.

The KVH stand is located in the Zespri tent and KVH staff will be at the stand until Friday to discuss biosecurity, Psa-V management and any other questions from growers and the general public.

Photo: growers get up close and personal with a Queensland Fruit Fly.

Lara Harrison, KVH Communications

Winter rates of copper
28 May 2015
Growers should now be moving to winter rates of copper. Copper use reduces through summer and coverage needs to be rebuilt as the risk of frost and hail increases and wetter conditions prevail. ...
Winter rates of copper
28 May 2015

Growers should now be moving to winter rates of copper. Copper use reduces through summer and coverage needs to be rebuilt as the risk of frost and hail increases and wetter conditions prevail.  Leaf spotting from spring infection still provides inoculum sources and heavy morning dews can provide sufficient moisture to re-activate Psa. 

Growers beginning winter work on Gold3 are noting some dehydrated cane and cane die-back in their canopies; and some Hayward growers in the Katikati region have also commented they are seeing new spotting on Hayward leaves. This indicates recent Psa infection and reminds us that Psa has not disappeared.

Frost damage, leaf-fall, wounds created when dropping strung canes and pruning activities all create opportunity for Psa to enter. Therefore levels of inoculum in the canopy must be managed.

After harvest, a copper and Actigard™ mix is recommended if leaf condition remains strong (leaves must be actively photosynthesizing to maximise the value of Actigard™). Do not apply Actigard™ to stressed vines.  Further applications of copper will be needed through the leaf-fall period and before and after winter pruning. Protection through dormancy presents much lower risk of phytotoxic effects.

Also, check the coverage of sprays applied.  Slow down to maximise the value of the applied products and avoid product waste through run-off.  Addition of spreaders will improve coverage and penetration into cracks and crevices. Time on target is important, and alternating the direction of travel for consecutive spray passes will help compensate for shadowing from pergola structures.

Linda Peacock, KVH Operations

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What Is Psa

Protection

How do I protect my orchard from Psa?
 


 

Testing

What do I do if I think I have Psa?
 


 

Psa Positive

What happens now?