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Great white<br />

butterfly –<br />

what is the<br />

threat?<br />

Autumn sown oats<br />

An evaluation of N responses in autumn sown oats<br />

in Southland found very clear differences between<br />

plots. Previous FAR work on autumn sown oats was<br />

promising and further work on time of sowing in the<br />

autumn is planned.<br />

These projects make up a very small part of FARs<br />

agronomic research portfolio. We also have significant<br />

investment in environmental research (eg see the<br />

managing nutrient losses article) and improving your<br />

farm business (ProductionWise paddock recording<br />

and benchmarking software is freely available <strong>for</strong> FAR<br />

farmer levy payers www.productionwise.co.nz). All these<br />

ideas originated from discussions and consultations<br />

with growers. We look <strong>for</strong>ward to hearing what has and<br />

hasn’t worked <strong>for</strong> you this season, and your ideas on<br />

what you need to know to increase business profitability<br />

and sustainability, so we can invest in the right projects<br />

to deliver benefits to you.<br />

- Nick Pyke, FAR CEO<br />

Brassica seed crop growers should be aware of the arrival of<br />

the great white butterfly (GWB) in New Zealand, but not overly<br />

alarmed by its presence.<br />

The great white butterfly (Pieris brassicae) has been declared<br />

an unwanted organism in New Zealand under the Biosecurity<br />

Act 1993, and FAR is contributing funds to the DoC led<br />

eradication programme.<br />

GWB is a serious pest of <strong>for</strong>age and vegetable brassicas in<br />

several countries, and was first identified in a Nelson garden in<br />

2010. It is a voracious feeder and is capable of causing serious<br />

damage to all types of brassica crops. New Zealand brassica<br />

seed growers should remain in<strong>for</strong>med of GWB’s presence, but<br />

FAR CEO Nick Pyke says there is no need <strong>for</strong> alarm at this stage.<br />

“The arable industry, like all primary industries is deeply<br />

concerned by any biosecurity incursion of this nature, and as<br />

the pest has the potential to affect brassica growers, we are<br />

contributing to the eradication programme. However, there<br />

are two things that growers should keep in mind. Firstly, the<br />

pest is currently contained within the Nelson/Richmond area,<br />

and a large scale project is underway to eradicate it, and<br />

secondly, if it spreads beyond that region, GWB should be able<br />

to be controlled in seed crops with the use of existing pest<br />

management programmes.”<br />

Photo supplied by Entecol.<br />

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