The 2015 Psa-V Seasonal Management Guide is now available on the KVH website – click here.
This new guide provides a basis for growers to build their individual Psa-V Orchard Management Plans for the coming season.
The 2015 guide incorporates year-round advice for managing Psa-V. Previous Seasonal Management Guides have been split into Autumn/Winter and Spring/Summer seasons.
Good management of Psa-V through autumn helps minimise disease levels seen in the following spring.
The response to the Queensland Fruit Fly outbreak in Auckland has now been operating for more than a month and is likely to continue for many more.
Field work, including intensive trapping, baiting and fruit collection and sampling also continue.
To date, 14 adult fruit flies had been found within the controlled area; and fruit fly larvae had been found in five separate properties within very close proximity of each other.
The infected properties continue to receive intensive ground treatment for fruit fly, including targeted foliage spraying and the use of insecticide granules. The ground surrounding the trees where larvae were found has been thoroughly sprayed and sealed with a polythene plastic cover (pictured above).
Any future developments will be communicated through the KVH website.
Ceratocystis fimbriata is a fungal pathogen that is causing significant damage to kiwifruit orchards in Brazil, with some growers reporting 50% vine loss over the past five years.
The sudden appearance of this pathogen in kiwifruit in Rio Grande do Sul, Brazil is considered particularly alarming as kiwifruit is highly susceptible and the production impacts of the pathogen threaten the viability of this industry in Brazil. There have been no reports of impacts to kiwifruit from this pathogen outside of Brazil to date.
New Zealand does have a strain of the C. fimbriata complex, causing black rot on kumara. Research is planned to determine if this strain is pathogenic to kiwifruit.
Control options against C. fimbriata have limited effectiveness and developing resistant or more tolerant cultivars is considered the best course of action to prepare for this pathogen.
A two year research project is being undertaken that will screen a number of C. fimbriata isolates, including the NZ and Brazilian isolates, for pathogenicity against a number of kiwifruit cultivars. This will allow the identification of:
Components of the research will be done offshore, however cultivar testing will require the Brazilian isolates to be imported into a New Zealand containment facility. Details on how the pathogen will be contained are provided in the document: Physical containment of plant pathogens.
Please see the KVH website for:
KVH has made some improvements to the R&D section of the website to make it much more user-friendly. Growers still need to be logged in to view the full R&D section.
The main changes:
Let us know your feedback on the new site – email KVH
Click here for the updated statistics.
The ERZ is a defined zone from which host material intended for export cannot be harvested, packed or stored. MPI have defined a compulsory ERZ which is 3.5 km radius from each detection site.
All host material transiting the MPI defined ERZ must meet the pest proofing requirements to be eligible for export certification. MPI Plant Exports have developed pest proofing requirements and procedures which are available on the MPI website – click here.
The total number of fruit flies found stands at 13. Two further male fruit flies were trapped within the controlled area over the last two days. There is no new evidence to suggest the situation is anything more than a localised population of fruit fly that can be eradicated.
Field work continues with a focus on the surveillance trapping system. Field teams are also applying insecticide bait throughout the Controlled Area, informing residents about the controls and inspecting gardens and rubbish bins.
Jan Purdie, Apata
Jan was deployed through KiwiNet and spent five days in the response operations in Grey Lynn.
Role: Surveillance. The surveillance team spends their day walking from house to house identifying and recording host plants on properties and collecting information about fruit and vegetable movements.
Within hours of receiving a call requesting help with the fruit fly response, Jan arrived at the Whenuapai Airbase in northwest Auckland for her first briefing.
Jan spent the next five days in Zone B as part of the surveillance team. This meant going from door to door in the controlled area talking to residents and asking them a series of questions about how they were disposing their fruit waste, whether or not they kept compost, checking properties for host plants and asking them about their recent activities around fruit and vegetable movements.
This information was recorded on manual forms, returned to HQ and later used by the fruit collection and tracing teams.
Dealing with so many people each day from very diverse cultures and backgrounds meant the surveillance people had to have good face to face communication and people skills.
Jan said local residents were very receptive and showed a lot of concern about fruit fly being discovered in their area. “Most residents were always happy to help and we met some truly wonderful people in the area. The locals and the people working in the response were doing all they could to help eradicate this fruit fly.”
Up to 30 kiwifruit industry people have been deployed into the response operations through KiwiNet to assist MPI and AsureQuality in the field. Lisa Ferguson from Trevelyan’s and Jan Purdie from Apata share their experiences and what their days involved.
Bud-rot in green kiwifruit (Actinidia sp.) varieties – spring 2014
The project aimed to identify the primary cause of bud-rot in green kiwifruit from orchards involved in a Psa spray programme trial. It concluded the majority of bud-rot symptoms observed in this trial were the result of Psa-V infection.