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Showing posts from June, 2012

Pasture Guide

2012 McLaren Vale Pruning Championship - Results

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The 2012 McLaren Vale Pruning Championship was held at the Visitor Centre vineyard on Friday the 22nd. Each competitor had to prune four panels of vines as quickly as they could. These vines were then checked for accuracy and a five second penalty was given for each mistake.

Our judges for this years event were Peter Ifould & Phil Rayner each with a wealth of experience in pruning. Derek Cameron and James Hook acted as their assistants.

Pruning Competition Rules
1. Two-Bud Spurs Only,
2. Clean cuts, no 'butts',
3. No damaged spurs,
4. Upward pointed spurs where possible,
5. Spacing important without being necessary,
6. Wire and vine clean of prunings,

Pruners time = Time taken to prune four panels + 5 seconds added for each mistake.

In a repeat of last year the competition it came down to a showdown between the two top pruners from 2011.

It was an extremely close finish with the 2011 runner up, Guri, closing the gap on the 2011 winner Jeremy O’Donald. Unfortunately for…

Glyphosate Resistant Ryegrass Strategy

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Over the last few seasons DJ's have been tracking Glyphosate Resistant Annual Ryegrass and developing control strategies. We have also been conducting trial work on conventional and grazing based control.

Our trial work has developed an effective control using an alternative herbicide family in early winter, June or July and a follow up at bud burst in Spring, September. We call this a 'double knock' treatment.

Please contract DJ's for more information.


Confirmed case of strobilurin-resistant Powdery Mildew

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Strobilurin-resistance has now been confirmed by researchers at the South Australian Research and Development Institute (SARDI).
The strobilurin group (stroby's) is the active fungicide in Group 11 (Pre-2009 Group K or QoI mode of action) fungicides such as Amistar, Cabrio and Flint) have been used in Australian vineyards for powdery mildew control for approximately 10 years.
In a recent trial at the SARDI Lenswood Research Centre in the Adelaide Hills, neither Amistar nor Cabrio controlled powdery mildew on infected chardonnay vines. The researchers, led by Dr Trevor Wicks, confirmed strobilurin resistance by the presence of the G143A gene in powdery mildew samples from the stobilurin-treated vines.
Dr Wicks: “This is the first confirmed case of strobilurin resistance of grape powdery mildew in Australia, although some cases of poor performance of this fungicide group have been noted in Australian vineyards.
Even though the trial vines had been subject to more strobilurin sprays than…

May Rainfall Summary

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May Rainfall  2012 = 50.4 mm

The May recorded rainfall for McLaren Vale was close to median rainfall. The May rainfall records of the last 10 years show May to be a reliable month. Only May 2005 'missed out' and since 2006 the recorded rainfall has been close to the mean.
The May 2012 rainfall total in Adelaide (Kent Town) was slightly above average, with 62.8 mm received on 13 rain days. This is compared to the long-term average of 60.0 mm on 14 rain days, with a median rainfall of 59.8 mm. By comparison, during May 2011, 61.8 mm was recorded.
The wettest periods for the Adelaide and Hills region occurred during the first and last week of May. Much of the rainfall observed for the month came from cold frontal systems, followed by moist south to southwesterly airstreams being directed across South Australia. Despite the first week of May being wet, rainfall remained well below average across the Adelaide region up until the 23rd when a low pressure system…