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Showing posts from May, 2009

Nutrition and Drought Effects Workshop

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Background.
McLaren Vale has had two very dry Winter/Spring Periods in the last three years.
In 2006/07 and 2008/09 vineyard yields (and to some extent Olive yields were reduced). Some vineyards were less than 50% of typical yields. Yields were reduced by a combination of reduced berry set (% flowers turned into bunches) and reduced berry size (berry weight).
Additionally the summers of both 2008 and 2009 had extended periods of heat which had a serious effect on vine and tree health.
With this is mind, Lucia Grimmer, researcher and agronomist with Agrichem visited McLaren Vale to give her thoughts on nutrition during droughts and heatwaves.
Forty grape growers joined us at the Willunga Football Club.

Problems during droughts.
Lucia notes the problems with drought are caused by dry soil. Limited soil moisture causes;
- Limited uptake of nutrients.
- Plant stress. Symptoms like early leaf drop, increased sunburn, increased splitting, thin cell walls and phenolic wine.
- Reduced soil m…

Albarino still on nursey price lists... They are wrong!

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All 'Albarino' that is commercially planted in Australia is in fact Savagnin. Everything comes from the same source and is the same clone (Galicia; or sometimes called SAVII 01). Remember whatever name the grape has it is still showing as a promising wine.
Some growers from other regions we have heard are preparing to remove their Savagnin and graft 'Albarino' back on top.
Bad news. There is no Albarino comercially available in Australia. While you will see 'Albarino' listed in many nursery adverts and product list - look closely and you will notice they are either SAVII 01 or Galicia.
These adverts should be changed to prevent confusion!
Don't buy Albarino cuttings and buds thinking you are getting something different that what has already been planted.
Over the next 2-4 years ‘real’ Albarino will become available directly from stock from overseas. This has already been DNA tested as part of the importation process. South Australian Vine Improvement ha…

On the Look Out for Resistant Ryegrass

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The first cases of resistant annual ryegrass from McLaren Vale were collected by myself and confirmed by Dr Angela Baker of the CRC-weeds based at the University of Adelaide in 2005. Since that time these ‘super weeds’ have been spreading and many cases remain undocumented and unnoticed.

Resistant annual ryegrass shows up where farmers have been applying glyphosate herbicides, commonly known as Roundup. This is particularly the case in vineyards and olive groves that were planted in old almond orchards.

When glyphosate first came onto the market in the 1960’s it was used heavily by almond growers with many sprays applied without rotation with another herbicide group. After frequent herbicide applications these grass populations evolved from being susceptible, to being resistant to the glyphosate herbicides. Once resistance was established the plants began to spread.

Now when glyphosate is used on resistant ryegrass it is not controlled well and it multiplied becoming a weed. In many …

2009 Vintage Pics - Winery

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2009 Vintage Pics - Vineyard

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