With autumn weather firmly settled in, reports of Psa-V symptoms are on the rise in some orchards. Mostly from sites where the disease has been challenging in the past.
On 9 May 2016 Kiwifruit Vine Health (KVH) signed the Operational Agreement (OA) for fruit flies on behalf of the kiwifruit industry—a significant milestone to further improve biosecurity readiness and response activities for fruit flies and the first such agreement under the Government Industry Agreements (GIA) partnership.
GIA partners, The Ministry for Primary Industries (MPI), Pipfruit NZ, NZ Citrus Growers and NZ Avocados are also signatories of the OA.
The OA sets out the operational requirements for readiness and response activities for fruit flies and importantly, enables joint decision making and also clarifies cost-sharing arrangements between government and affected industries.
Under the OA, KVH and other parties will agree a work plan to improve readiness and response, including how we can detect fruit flies earlier and also reducing costs without reducing effectiveness.
Cost-sharing for fruit fly readiness and response activities commences when the OA comes into full effect in 2017. Once fully implemented, the Government will pay the first 20% of total costs on behalf of risk exacerbators. The remaining costs will then be shared by government and benefiting industries as follows:
The industry portion will then be divided among all benefiting industries based on industry value. For a fruit fly incursion, the kiwifruit industry currently represents about 48.5% of the value of all industries potentially affected by this organism, and therefore would pick up 48.5% of the total industry share.
Costs are limited by a fiscal cap which equates to about $3.12m for the collective industry share. The existing kiwifruit biosecurity levy paid by growers is sufficient to cover kiwifruit industry costs under the OA.
Industries that benefit from a response but haven’t signed up to GIA or the OA will still have to pay their share and the government will seek to recover costs from 1 July 2017.
Last week KVH hosted twenty-three visitors from MPI’s surveillance and incursion investigation teams from Wellington. The purpose of the visit was for MPI staff who are directly involved in incursion responses to gain both a better understanding of the kiwifruit industry and an overview of the work KVH is doing around biosecurity.
The group visited Trevelyan’s Pack and Cool to observe packing and coolstore operations; and Plant and Food Research where they were updated on kiwifruit research by Dr Stuart Kay.
After a busy morning in Te Puke they were presented with Zespri’s industry overview and future strategy by Carol Ward.
KVH highlighted its ongoing biosecurity initiatives and discussed partnerships with the regional councils, ports, freight and logistics sectors to raise biosecurity awareness amongst these sectors.
The tour also provided a good opportunity to discuss future possibilities about how industry and MPI can work together under GIA on biosecurity challenges.
Immediately following harvest, growers should be getting copper spray programmes underway to help prevent Psa entering their vines through harvest wounds and leaf scars.
Incorporation of Actigard into a post-harvest programme will reduce the likelihood of disease symptoms appearing the following spring. Actigard can be tank mixed with copper and is most effective when applied to leaves that are still in good condition. Extreme care must be taken to avoid spray drift onto unharvested blocks.
Following the discovery of copper-tolerant and streptomycin-resistant Psa developing on some orchards, a robust spray programme and cutting out infected material is particulary important through autumn and winter to reduce the spread of these new Psa strains.
Best practice advice for post-harvest protection and managing tolerance and resistance:
Autumn and winter are high-risk periods for Psa-V. While vines are dormant the disease can still be active and enter through pruning wounds, new grafts and frost-damaged tissue.
For more information, refer to KVH’s Psa-V Best Practice Guide at www.kvh.org.nz/seasonal_advice.
Any growers concerned they may not be achieving the expected levels of Psa control from copper applications at label rates should contact KVH on 0800 665 825 or email email@example.com.
Young plants, or vines newly grafted this season should be protected through the autumn period—particularly those located in frost-prone sites or close to Psa-V affected locations.
New leaf spot symptoms are being seen on a number of sites indicating a lift in Psa-V activity as we begin to experience colder wetter weather periods.
A protective spray programme re-establishing copper cover is now high priority to protect young tissue and plants.
The KVH Psa-V Risk Model has predicted high risk periods for Psa-V over the last few weeks with these periods matching periods of rainfall.
Actigard manufacturer Syngenta, will not be renewing the limited label claim on soil-applied Actigard from May 2016. Therefore, from May onwards soil-applied Actigard will be considered off-label use. However, it may still be approved by Zespri under Justified Approval (JA).
Foliar-applied Actigard is not affected by this change.
Please contact Sylvia Warren, Crop Protection Advisor on firstname.lastname@example.org for more information on a JA.
Record numbers of arriving passengers into NZ over the 2015/16 summer have kept border biosecurity defences busy over the season.
However, strengthened biosecurity measures have stopped hitchhiking pests and diseases from entering New Zealand without affecting passenger processing time. In fact, processing time is down on last year, and compliance rates (the amount of times MPI correctly detects risk goods carried by passengers) are up at 99%.
Significantly, these detections included 14 fruit fly found on passengers—reflecting the biosecurity risk pressure at our borders.
Strengthened biosecurity measures include:
Click here to read more on MPI’s website.
MPI’s latest summer statistics are a good indication of the pressure New Zealand’s borders are facing. Here’s a snapshot of some interesting stats:
Click here for full details.