Tuesday, 23 December 2014 00:00

Sports and spots for survey

Written by 
This Sauvignon Blanc leaf tested negative despite symptoms This Sauvignon Blanc leaf tested negative despite symptoms

Assessing the level of virus infection across New Zealand vineyards is the subject of Arnaud Blouin’s doctoral research – and he’s looking for industry participation during the run-up to vintage 2015.

 Blouin, a senior staff member at Plant & Food Research Ltd in Auckland, is conducting a survey of grapevine viruses already present in the country as part of his studies at the University of Auckland. He also hopes that growers and viticulturists will contact him if they spot unusual symptoms in the vineyard during the period from late January to April.  

Symptoms of interest include:

• Leaf distortion, leaf spots, leaf scorch or unusual leaf colouration (early yellowing or reddening, for example)

• Extremely low vigour

• Unusual branching or uneven wood maturation on canes

• Early leaf drop

• Graft incompatibility symptoms

‘The symptoms may be an indication of infection from one or more grapevine viruses, which can be identified using laboratory diagnostics,’ observes Blouin. ‘Some viruses might be harmless but the goal of my survey is to learn as much as possible about their presence and impact – and growers can help with that.’

Blouin is the current recipient of New Zealand Winegrowers’ Rod Bonfiglioli Scholarship, and he is working closely with team members from the Virus Elimination Project to stop the spread of Grapevine leafroll-associated virus 3 in New Zealand vineyards. He can be contacted by email at This email address is being protected from spambots. You need JavaScript enabled to view it.

More like this

Farewell to Rob Agnew

“We’ve just had the first decent shower in three months,” says Rob Agnew when we call him.

Weather Watcher: Victoria Raw

A one-year Erasmus Programme in France in year three of an agricultural degree introduced Victoria Raw to the wine industry, and changed her life.

New apricots a sweet success

New apricot varieties especially bred to give the New Zealand industry a shot in the arm are looking “amazing” in their first full commercial season, says grower Sharon Kirk.

5 + 2 = Healthy!

With winter chills hitting, getting at least two servings of fruit each day is a great way to improve your health and wellbeing.

Ag man bags top science role

Well-known Plant and Food Research soil and environment scientist Brent Clothier is the new president of the Royal Society, Te Aparangi.

» Latest Print Issues Online

Popular Reads

Ten years of Méthode Marlborough

New Zealand wine enthusiasts have a deepening understanding and growing appreciation of sparkling wine, says Mel Skinner, Chair of Méthode Marlborough…

Sustainability Success

Taking two sustainability awards at two events on a single evening felt like "true recognition" of the work Lawson's Dry…