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The goal of this wiki is to share information about the premature oxidation of white burgundy wines. The idea for this wiki was submitted by Charles Smith in a discussion thread on the Mark Squires' wine bulletin board on the E-Robert Parker website. A lot of background information can be found in a long-running thread on premature oxidation (if you still have access to it).

In practical terms, our aim is to build progressively a list of specific wines / producers / vintages that have displayed this problem. The minimum entry would be to give full information about the wine. More elaborate entries could contain e.g. a ratio of bottles oxidized / bottles opened for a specific wine, or information about yields or winemaking techniques for each producer. Since many people think that corks take a central role in this issue, it might also be worthwhile noting whether the cork was bleached and whether there was a light blue tinge where the wine touched the cork.

Please contribute; this board is only valuable if people continue to contribute notes about their experiences; it's really easy! Also, please add your name at the end of each post.

[Updated June 22, 2024] Beginning with the 2007 vintage, several producers have abandoned natural cork and switched to DIAM closures. With the 2014 whites now being released, switching to DIAM closures from natural cork has become a strong trend and there is now a significant amount of the white burgundy market where the bottles have DIAM cork closures.

DIAM closures are considered “technical closures” and are made from agglomerated cork (which is ground into fine pellets, sifted to a uniform consistency and then glued with a food-grade binder.) Champagne corks are made in this way. DIAM has a patented process in which the cork pellets are treated with CO2 under temperature and pressure in order to remove TCA. DIAM has some sort of “guarantee” to the producers against cork taint, the mechanical details of which are unclear to me at this writing. DIAM also claims that its closures provide very tightly controlled long-term oxygen transmission rates which are far more uniform from bottle to bottle than natural cork. There is laboratory data which seems to support this claim.

In Europe DIAM was initially marketing three grades of DIAM corks DIAM-5, DIAM-10 and DIAM-15. Starting with the 2013 vintage, there is a new DIAM-30 model. (It's not clear, but DIAM-15 is apparently no longer in the portfolio.) These numbers correlate with the time period for which the wines are allegedly guaranteed against premature oxidation. (Again the details of this “guarantee” are unclear to me. The guarantee supposedly runs only to the producer/brand owner.) DIAM is offering the corks in two lengths, a standard length and new longer “grand cru” cork.

NOTE: On the wines listed below, with rare exception, I have not listed producers utilizing DIAM closures on only selected wines in their portfolio - because that is generally not of much help.

Domaine William Fevre began bottling a portion of its Chablis (the 1ers) with DIAM in 2007. Starting in 2009, all of the Fevre production except for the grand cru Chablis moved to Diam.

Beginning with the 2009 vintage, additional producers begin using DIAM closures. Bouchard Pere et Fils (Bouchard and Fevre have common ownership) moved all of their whites to DIAM beginning with the 2009 vintage. Domaine Montille, Deux Montille, and Domaine de Chateau de Puligny Montrachet (all related brands), along with Javillier and Roger Belland have bottled all of their white wines under DIAM starting with the 2009 vintage. [Note: Javillier subsequently stopped using DIAM for its Corton Charlemagne and perhaps other wines, so they are no longer listed below.]

F&L Pillot joined the DIAM parade with the 2010 vintage and Fevre began bottling all of their grand cru Chablis with DIAM corks.

In the 2011 vintage, Jadot, Domaine de Bellene (and Roche de Bellene), Guffens-Heynen, and Droin (in Chablis) began using DIAM for all of their white wines.

Starting with the 2012 vintage, Olivier Leflaive and Jean-Marc Brocard in Chablis began bottling all of their whites under DIAM closures.

Starting with the 2013 vintage, Lafon, Prieur, Maison Harbour and Chanson began using DIAM for all of their whites (except, in Lafon's case, the entry level Macon that is sold in Australia, which is bottled under screw cap). Lafon is using DIAM 30 (intended to be used for wines intended for 30 or more years of bottle age). Prieur is using DIAM 10 for the village and premier cru wines and DIAM 30 for the grand crus. Chanson began using the new DIAM 30 on all of Chanson's top wines. Bouchard Pere also immediately started using the new DIAM 30 for all of its whites when they became available.

Starting with the 2014 vintage, Domaine Leflaive is bottling all of their wines with the new DIAM 30 corks. Daniel Dampt is bottling 90% of their production under DIAM. According to Dampt, the remainder are being bottled either under screwcap or natural cork, depending on the importer's preference. Chablis producers Sebastian Dampt and Vincent Dampt are also bottling their wines with DIAM but I do not have confirmed inception dates.

Starting with the 2015 vintage, Heitz-Lochardet and Domaine Vocoret et Fils (Chablis) bottled all of their wines under DIAM. Jean Collet (Chablis) began bottling all of its wines under DIAM (except for wines imported by Kermit Lynch).

Starting with the 2016 vintage, Marc Colin are bottling their whites under DIAM 30. Louis Moreau (Chablis) is bottling all of their wines under DIAM.

Starting with the 2017 vintage, Joseph Colin, Paul Pernot, Rapet and Tollot-Beaut are bottling their wines under DIAM. Christian Moreau is bottling all of their Chablis except for the Clos des Hospices cuvee under DIAM. Hubert Lamy, who had been bottling a portion of his production under DIAM was up to 80% of his production in 2017.

Starting with the 2018 vintage, Antonin Guyon and Fabien coche are bottling all of their wines with DIAM and their top wines under DIAM 30. Long-Depaquit and Domaine de Pavillon (both owned by Bichot) are bottling their wines using either DIAM 10 or DIAM 30. Gilbert Picq and Charlene & Laurent Pinson (Chablis) and L' Domaine d'Henri were also bottling with DIAM as of this vintage.

Starting with the 2019 vintage, Humbert Lamy's wines were 100% bottled under DIAM. Domaine Meurgey-Croses and Hugues Pavelot are also bottling exclusively with DIAM. In somewhat of an oddity, Domaine Louis Latour bottled its Chevalier Demoiselles (only) under DIAM in 2019 and 2020.

As of the 2020 vintage, 100% of the wines from Jean Charton, Benjamin Leroux, Domaine de Lambrays and Chateau de Meursault wines are bottled under DIAM.

As of the 2021 vintage, Domaine Louis Michel in Chablis is bottling all of their wines under DIAM.

As of the 2022 vintage, Michel Bouzereau, Maison Chanzy, Antoine Jobard, William Kelley, Louis Latour and Niellon (except for grand crus!) are bottled under DIAM.

Another trend that seems to be occurring among producers that continue to use natural cork is the use of longer corks (with longer bottle necks to insure a tight seal along the full length of the cork) and slightly increasing the diameter of the corks. The standard cork diameter employed in burgundy is 24 mm. Some producers, such as Sauzet, Niellon and Colin-Morey, began using 25 mm diameter corks in the same bottles (starting with the 2010 vintage) as a means of obtaining a tighter seal. This requires both greater compression force to initially seal the bottles and greater extraction force to remove them..

LIST OF PRODUCERS USING DIAM FOR SUBSTANTIALLY ALL BOTTLINGS (and vintage of inception of complete use)

Ballot-Millot (2022) (Note: 1ers remain under cork
Roger Belland (2009)
de Bellene and Roche de Bellene (2011)(in 2022 everything now under DIAM5 instead of DIAM10
Samuel Billaud (2019?)(Note: grand crus remain under cork)
Bouchard Pere (2009)
Michel Bouzereau (2022)
Jean-Marc Brocard (2012)
Chanson (2013)
Maison Chanzy (2021?)
Jean Charton (2020)
Vincent & Jean-Pierre Chartron (2020?)
Chateau de Meursault (2020)
Chateau de Puligny Montrachet (2009)
Fabien Coche (2018)
Marc Colin (2016)
Joseph Colin (2017)(all DIAM30)
Jean Collet [Chablis] (2015, but excludes US imports through Kermit Lynch)
Daniel Dampt (2014) (90% of production. Since 2020, 100% of production)
Sebastian Dampt (2015?)
Vincent Dampt (2015?)
Droin (2011)
William Fevre (2010)
Alain Gutheron (2020?)
Guffens-Heynen (2011)
Antonin Guyon (2018)
Maison Harbour (2013)
Heitz-Lochardet (2015)
Domaine d'Henri (2018)
Jadot (2011)
Antoine Jobard (2022)
William Kelley (2022)
Lafon (2013)
Domaine de Lambrays (2020)
Hubert Lamy (2017 for 80% of production; 2019 for 100% of production)
Louis Latour (2022)
Vincent Latour (2020)
Domaine Leflaive (2014) [but be somewhat wary of big cut in SO2 use in 2015]
Olivier Leflaive (2012)
Benjamin Leroux (2020) [Note: only 20 ppm free SO2 with Diam 30 and excludes magnums]
Long-Depaquit (Bichot) (2018)
Duc du Magenta (inception date unclear)
Louis Michel (2021)
Christian Moreau (2017) (2017-2019 Excludes Clos des Hospices; beginning 2020-all DIAM)
Louis Moreau [Chablis] (2016)
Montille (also Deux Montille and Maison Montille) (2009)
Meurgey-Croses [Macon] (2019)
Niellon (2022) (Note: Chevalier and apparently Batard remain under cork)
Hugues Pavelot (2019)
Jean-Marc and Hugues Pavelot (2022)
Domaine de Pavillon (Bichot) (2018)
Paul Pernot (2017)
Gilbert Picq (2018)
F&L Pillot (2010)
Charlene & Laurent Pinson [Chablis – this is not Domaine Pinson Freres] (2018)
Prieur (2013)
Prudhon (2022?)
Rapet (2017)
Tollot-Beaut (2017)
Jean-Marc Vincent (2017)
Vocoret et Fils [Chablis] (2015)

STAY TUNED FOR FURTHER DEVELOPMENTS….

(June 5, 2020) We've recently done a major update to producer incidence list which takes into account both the rapidly expanding use of DIAM closures and more recent data on the incidence of oxidation and notably advanced wines. See Producer Incidence The list has changed quite a bit over the last 15 years but some of the worst offenders have been on the list since it was initially published and exhibit no signs of change or even acknowledgment that premox is a problem for their wines.

(June 4, 2020) The fourteenth annual white burgundy vintage assessment dinners were held in Los Angeles on February 18, March 14, and March 27, 2019. We tasted 75 wines from the 2011 vintage in three nights. All of the wines were served single blind (except for the ringers which are double blind) and all of the voting takes place completely blind (with individual written ballots) with the attendees ranking their top five wines by bottle number.

My overall impression from these dinners was that the 2011 vintage, both in Chablis and the Cote de Beaune, is a solid, technically correct vintage, but most of the wines tend to the leaner side and do not have as much density and weight as the 2009 and 2010 vintages. The 2011s are well structured and show pretty good vineyard transparency. Unlike the 2008, 2009 and 2010 vintages, none of the 2011 wines we tasted were affected by botrytis, surmaturite, or rot. But, at the same time, the very top wines from our tastings in those prior vintages (except for the 2010 Cortons) are most often a point or two better than the corresponding ratings for the 2011s. The 2011s from Chevalier Montrachet and Montrachet were particularly good and seem to hold their own against the 2008, 2009 and 2010 vintages.

On Night One we tasted thirty-two 2011 white burgundies from Chablis, Meursault and Corton Charlemagne. The 2011 Chablis as a group were more approachable/enjoyable than they usually are at age 7.5 (so perhaps they will have slightly less than the usual longevity). One of the things that I noticed (particularly on night one) was an astonishing level of uniformity in the color, and very good acidity. I don’t think I’ve ever seen a vintage from the Cote de Beaune with such uniformity of color. Given the uniformly light colors and good acidity levels of the wines, I suspect that the top level 2011 whites from Meursault and Corton will have an aging curve comparable to the 2007s (which was another early vintage).

We experienced a very large divergence in the number of oxidized and advanced wines during the 2011 vintage. We encountered very little premox on night one, and none at all on night three (the only other time this happened was with the 2007 vintage), but we had a large percentage of premox on night two. On Night Two we tasted twenty-nine wines from the hyphenated grand cru vineyards of Bienvenues and Criots-Batard Montrachet, Batard Montrachet and Chevalier Montrachet along with a couple of ringers. The wines were much more uneven, but the Chevalier Montrachets particularly stood out.

The very uneven premox performance over the three nights demonstrates the risk of judging a vintage based on wines from a limited number of samples or just a few of the appellations. (Yes, this is hard to figure….) We also experienced the largest number of bottles ever which seemed to have reduction problems or serious chemical flaws. A total of 11 of the 29 wines we tasted on night two either had premox problems or some type of reduction–related issue or a serious chemical flaw. We didn’t have numbers like that on night one or night three, or in prior years, but this dinner certainly confirmed for me that reductive winemaking, while it may help to avoid premox issues, can also lead to issues of its own.

On Night Three we tasted 14 bottles of “Mostly Montrachet,” Coche-Dury Corton and MP, and two ringers. The 2011 Montrachets and the two 2011 Coche wines were extremely impressive. I thought these wines would hold their own very well with the 2010s.

The DIAM closed wines continued to perform flawlessly from a premox perspective. Once again, there were no oxidized or advanced bottles closed with DIAM. There were also no unusual or unexpected aromas. Over the past three years we have now had 30 bottles closed with DIAM in excellent condition (but we did have one chemically flawed bottle of Jadot Bienvenues on night two.)

(September 14, 2018) The thirteenth annual white burgundy vintage assessment dinners were held in Los Angeles on February 7, February 20 and March 7, 2018. We tasted 80 wines from the 2010 vintage in three nights. All of the wines were served single blind (except for the ringers which are double blind) and all of the voting takes place completely blind (with individual written ballots) with the attendees ranking their top five wines by bottle number.

The 2010 vintage illustrates, perhaps better than most, the difficulty in making sweeping judgments about a vintage. The flight of 2010 Chablis (on night one) and the flight of Criots/Bienvenues Batard Montrachets (on night two) probably ranked as the best we’ve ever had from those appellations. The wines from Montrachet (night three) were at a similar very high overall level of quality – along with the 2007 vintage, this was one of the top two “Mostly Montrachet” dinners of all time. The wines from Chevalier Montrachet (night two), which include a phenomenal ringer from Colin-Morey Chassagne En Remilly that was the overall No. 1 rated wine on night two, were a little bit more variable, but mostly performed at a similarly high level. But the wines from Meursault and Corton Charlemagne (night one), and Batard Montrachet (night two), when viewed as a group were not nearly so impressive. Even among the latter wines there were exceptions, like the Coche-Dury Corton Charlemagne (night three) and the Dancer and Roulot Meursault Perrieres.

One of the problems that affects a number of 2010s is botrytis. There was virtually nothing written about it when the reviews came out, but most of the producers I’ve spoken with over the past few years acknowledge it was an issue – and for some, it was a significant issue.

On Night One we tasted 32 of the top wines from Chablis, Meursault and Corton Charlemagne at Valentino restaurant. On Night Two we tasted 32 of the top wines from the hyphenated Montrachet vineyards again at Valentino. On Night Three we tasted 16 wines in the dinner known as “Mostly Montrachet”

Over the three nights, we experienced 9 out of 80 bottles which were either advanced or oxidized (11.25%), which was an all-time low. Of the 80 bottles, 9 were closed with DIAM. There were no advanced, oxidized or corked wines among the nine DIAM-closed bottles. Excluding the DIAM bottles, we had 9 bottles out of 71 (12.68%) that were either advanced or oxidized. That's essentially tied with the 2004 vintage where we had 12.70% either advanced or oxidized.

I hope you enjoy the notes and the photos.

(November 2017; updated September 14, 2018) We tasted the 2007 Chablis on night one of 2007 vintage tasting in 2015. In my summary of the tasting below, I wrote: “We all agreed that the 2007 Chablis notably under-performed versus the early very laudatory reviews which suggested that 2007 is a classic vintage. The wines did not improve over the course of the evening either.” I had purchased quite a stock of 2007 Dauvissat, Raveneau and Fevre in the expectation that they would be wonderful classic chablis. But after our tasting I was so underwhelmed that I resolved to send most of my stock off to auction.

Luckily for me, I never got around to collecting those wines from their various storage locations in order to sell them. What I've discovered over the last six months is that the 2007 grand crus from Dauvissat and Raveneau (along with Dauvissat Forest and Raveneau MDT) have made the unexpected transition from ugly ducklings into graceful swans. Dauvissat Preuses and Forest and Raveneau Valmur and Blanchots are my favorites today, but all of the 2007s I've opened lately have been very enjoyable. I also brought home my 2007 Fevre Chablis. Much to my surpise, the Fevre Clos is the clear Chablis of the vintage – every bottle has been in fabulous condition and this wine is truly in classic Chablis style - oyster shell minerality in abundance and light, bright, refreshing fruit with great acidity. The 2007 Fevre Preuses and Valmur also rock. Out of about 15 bottles of 2007 Fevre consumed so far, I haven't had a single oxidized or advanced bottle.

The 12th annual Vintage Assessment and Premox Check dinners were held on March 1 and March 15, 2017. The format was slightly different this year and we tasted 62 wines from the 2009 vintage in two nights. Except for the Chablis, the wines from 2009 far exceeded my initial expectations. When the Cote de Beaune wines were released, I thought most of them were excessively sweet. (I frequently used the descriptor of “7-Up” in my notes). As a result, I cellared very few 2009s. But the Cote de Beaune wines we tasted, for the most part, far exceeded my initial expectations. The level of improvement was even more profound than what we experienced with the 2006 vintage.

The bad news for 2009 was that, in my judgment, 2009 is the least impressive vintage of Chablis that I’ve ever tasted – far worse than the 2007s or the 2005s (but see the post-script above on how well the top 2007 Chablis have turned out at age 10.) The 2009 Chablis were extremely thin and mostly lacking in Chablis character. In my opinion, it’s a vintage of Chablis to avoid. But in contrast to the disappointing Chablis, the flight of Meursault Perrieres was, when considered as a whole, the most consistent flight of Meursault Perrieres, from top to bottom, that we’ve ever had. The wines were uniformly very impressive. The Corton flight, while it had a greater range of variation, was also excellent. The Cortons were bigger bodied and richer than the Meursaults, as you would expect. But they were surprisingly classic in style compared to how sweet and 7-Up like many of the wines tasted like at the time of release. See 2009-Night 1

The second night's dinner consisted of grand cru wines from the five Montrachet grand cru vineyards. The clear vineyard “winner” on night two was Montrachet, where there were zero premox issues and every bottle was excellent. In Bienvenues and Criots, the wines were generally lighter and more dilute. The Chevalier Montrachets, once you excluded the three bottles with obvious defects, were excellent, though not quite as excellent overall as the Montrachets were. The Batards were generally nice wines, but they clearly weren’t as impressive as the Montrachets and Chevaliers in 2009. Continuing the theme from night one, being upslope (i.e. MP, Corton Charlemagne, Montrachet and Chevalier) seems to have made a huge difference in 2009. See 2009-Night 2

Over the two nights,8 of 62 bottles were either advanced or oxidized (12.9%). The 12.9% total incidence is relatively close to the record low incidence of 12.68% for the 2007 vintage and 12.70% for the 2004 vintage. However, the 2009 tastings included nine bottles closed with DIAM, none of which were advanced or oxidized. If you consider only the 53 bottles with conventional cork closings, the advanced or oxidized percentage rises to 15%.

The 11th annual Vintage Assessment and Premox Check Dinners were held on February 9, February 25 and March 8, 2016. This year the vintage was 2008. The first dinner was held on February 9, 2016 and we tasted 29 bottles of the top 2008 Chablis, Meursault, and Corton Charlemagnes, plus one 46 year old Leroy white. See the notes here. 2008 Vintage-Night One The Chablis flight was one of the most impressive in some years. The Meursaults were also outstanding, but overall didn't quite reach the lavel of the 2007 Meursault flights. The Corton Charlemagnes performaed well. There were a few exotic aromas and a couple of wines with obvious botrytis, but overall things seemed pretty impressive.

On February 25, 2016 we tasted 26 bottles of Bienvenue-Batard, Criots-Batard, Batard and Chevalier Montrachet and 3 selected ringers. We experienced significantly more advanced wines and well as much more obvious botrytis signatures in several of the wines. The 2008 Batard flight was one of the least impressive flights of Batard we've ever had at this dinner series. The Bienvenues and Criots flight performed much better and so did the last flight of Chevalier Montrachet with four spectacular wines that really saved the evening. The ringers this year didn't fare as well as the 2007 ringers as a group. See the notes here. 2008 Vintage-Night Two

On March 8, 2016 we held the annual “Mostly Montrachet” dinner at Melisse restaurant in Santa Monica. We tasted a total of 11 Montrachets and the two top Coche-Dury wines, Corton Charlemagne and Meursault Perriees. This night was the worst one from an oxidation persepctive and we also again had some wines that were absolutely reeking of botrytised aromas. A few of these wines were spectacular and a few were very expensive duds. See the notes here. 2008 Vintage-Night 3

(March 19, 2015). It doesn't seem possible, but this year marks the 10th Anniversary of the Vintage Assessment and Premox Check Dinners held in Los Angeles. The notes and results from the initial dinner, held on February 3, 2015, where we tasted 30 bottles of the top 2007 Chablis, Meursault and Corton Charlemagnes, have been posted here. 2007-Night 1 The Meursaults performed fabulously and met or exceeded all of the reviewers' early expectations. We all agreed that the 2007 Chablis notably under-performed versus the early very laudatory reviews which suggested that 2007 is a classic vintage. The wines did not improve over the course of the evening either. The Cortons were generally very good (mostly 93-94 point wines) but they didn't match up to the Meursaults and my scores were generally one to three points lower than the early reviews by Messrs. Meadwos and Tanzer. We had one corked bottle, three advanced bottles and no oxidized bottles. I hope you enjoy the notes and photos.

On March 4, we did our usual hyphenated Montrachet tasting. We tasted 27 bottles including a few French and California ringers thrown in to keep things real. There were some wonderful surprises that blew everybody away, including a California chardonnay that finished as the No. 2 wine of the night, and an astonishingly bad performance for Domaine Leflaive,with both both 2007 Batard and 2007 Chevalier oxidized. Sadly a bunch of emergency tasting in the subsequent few weeks showed a large percentage of the 2007 Leflaives are similarly flawed. You will find the notes here. 2007-Night Two

On March 19, we held our “Mostly Montrachet” dinner at Melisse Restaurant. In my opinion, it was the most remarkable set of Montrachets that we've ever had. This was an evening when nobody could get that silly grin off their face. Wines that haven't starred in the past showed gloriously. The usual top performers were very backward and may eventually be wonderful. If you have bottles of most of these 2007 Montrachets, count yourself very lucky and be sure to enjoy them. You'll find the Night Three notes here. 2007-Night Three and Overall Results

From an overall perspective, the 2007 vintage had the lowest rate of outright oxidation, and depending on whether you use the group votes or my votes to calculate, either the lowest overall rate of either oxidized or advanced or the second lowest rate. But for the the premoxed Leflaive wines, there would be definite cause for celebration.

The ninth annual Vintage Assessment Dinner, this time for the 2006 white burgundy vintage, was held in Los Angeles on March 6, 2014 at Valentino restaurant. This year the tasting was only night, with 28 wines, rather than the usual three nights (and 60+ wines). The 2006s surprised us all and performed much better than we initially thought they would when the vintage was released. Many of the wines were more pleasant than their 2005 counterparts and the combined total of advanced and oxidized wines for 2006 was lower – 20%– than it was for 2005. You'll find the notes here. 2006 Vintage Assessment Dinner

After tasting 65 wines over three nights in February 2013, our Southern California tasting panel found that 2005 is the worst year ever from a premature aging standpoint. While the percentage of oxidized wines was only 6% – the second lowest overall percentage to date, the percentage of advanced 2005 wines was really staggering – 25%. The combined total of advanced and oxidized wines for 2005 (31%) exceeds the total for the 1996s (29%), the 1999s (27%) and 2000s (28%). 2005 is a vintage which is quite sweet, and virtually all are ready to drink now. Only a small handful of wines will reward further aging and our experience suggests that the risk of further aging with most wines is significant. If you own 2005s you need to check out our notes on the 2005s (see 2005-Night 1, 2005-Night 2, 2005-Night 3 and cumulative results) and pop some corks yourself.

Please see the General Discussion pages which explain the phenomenon of premature oxidation and discuss the various various theories and evidence regarding the causes of premature oxidation of white burgundies. These pages also include a discussion of the historical performance of the various producers from an oxidation perspective and a grouping of the producers into five categories based on historical oxidation performance based on the opinions of Editor Don Cornwell.

There is a subtantial variation in the incidence of premature oxidation by producer. Some producers have a very high level of incidence of premature oxidation and a few producers have virtually none. In addition to our comprehensive list of data by producer, the editor (Don Cornwell) breaks the burgundy producers into five different categories based on the incidence of premature oxidation in their wines from the 1995 through 2012 vintages. See Producer Incidence

The cause or causes of premature oxidation remain subject to considerable debate but most of the discussion centers upon four different different alleged causes. Click on the links below to see a discussion of the alleged cause in question.

• Lowered Sulphur Dioxide Levels
• Corks and cork treatments
• Batonnage (stirring of the lees)
• Gentler Presses
• Other Alleged Causes

Each February or March for the past six years, the editor (Don Cornwell) has held a comprehensive tasting/oxidation check of a particular white burgundy vintage. The purpose of the tasting is to assess the top wines of the vintage all at the same time from ideal cellar conditions and to check for premature oxidation. The wines are usually tasted at 7.5 years after the vintage date. The wines are tasted and evaluated by a panel of serious burgundy drinkers. You will find a comprehensive tasting notes, premox statistics and comments about the wines tasted by clicking on the links below:

January 25, 2006: 28 wines in a single sitting. You'll find the the notes here: 1996 Vintage Tasting and Oxidation Check.

February 28, 2007 and March 5, 2007: 44 top premier crus and grand crus tasted over two nights (with notes on three bottles from another tasting a month previously). You''ll find the notes and stats here: 1999 Vintage Tasting and Oxidation Check.

February 5 and 26, 2008: 41 top premier crus and grand crus tasted over two nights. You'll find the notes here: 2000 Vintage Tasting and Oxidation Check. The notes also include a tasting of 16 additional wines, including two 2000 Chablis Clos, four different 2000 Puligny Caillerets and ten 2000 grand crus held on June 18, 2007.

February 4 and 11 and March 10, 2009: 43 top premier cru and grand cru wines (including for the first time some grand cru Chablis) were tasted over three nights. You'll find the notes here: 2001 Vintage Tasting and Oxidation Check

Febuary 4 and 18 and March 4, 2010: 60 top premier cru and grand cru Chablis and Cote de Beaune whites tasted over three nights. You'll find the notes here: 2002 Vintage Tasting and Oxidation Check

February 8 and 23 and March 8, 2011: 66 bottles of the top premier cru and grand cru Chablis, and Cote de Beaune whites tasted over three nights. You'll find the notes here. 1995-2000 Retrospective

February 15 and 28 and March 7, 2012: 63 bottles of the top premier cru and grand cru Chablis and Cote de Beaune whites tasted over three nights. You'll find the notes here: 2004 Vintage Assessment and Oxidation Check Dinners

February 5, 20, and 27 2013: 65 bottles of the top premier cru and grand Chablis and Cote de Beaune whites tasted over three nights. You'll find notes and photographs for each night here: 2005-Night 1, 2005-Night 2, 2005-Night 3 and cumulative results.

March 6, 2014: 28 bottles of the top grand cru and premier cru Chablis and Cote de Beaune wines tasted on a single night. You'll find the notes and photographs here: 2006 Vintage Assessment Dinner

February 3, 2015: 30 bottles of the top premier cru and grand cru Chablis, Meursault and Corton Charlemagnes tasted on night one of a three-night series of dinners.
2007-Night 1
2007-Night 2
2007-Night 3

Here is a list of producers that might or not be affected by this problem. Each producer has its own page with information about winemaking techniques and a list of wines that have shown to be affected (or not).

The list of producers is also available sorted by appellations.

• Aladame, Stephane
• Ambroise, Bertrand
• Amiot, Guy
• d'Angerville
• Anglada-Deleger
• d'Auvenay
• Bachelet, Jean-Claude
• Bachelet-Ramonet
• Ballot-Millot
• Belland, Jean-Claude
• Belland, Roger
• Billaud-Simon
• Bitouzet-Prieur
• Bize, Simon
• Blain-Gagnard
• Boillot, Henri and Boillot, Jean
• Boillot, Jean-Marc
• Bonneau du Martray
• Bouchard Pere & Fils
• Boudin (Dom. de Chantemerle)
• Bouzereau, Michel
• Boyer-Martenot
• Brenot, Philippe
• Brocard, Jean-Marc
• Buisson-Charles
• Camille Giroud
• Carillon, Jacques
• Chablisienne, La
• Champy, Maison
• Chandon de Briailles
• Chanson
• Chartron, Jean
• Chartron Trebuchet
• Chavy Alain, Domaine
• Chavy, Gerard
• Clair, Bruno
• Clerc, Henri & Fils
• Coche-Dury
• Colin, Bruno
• Colin, Madame François
• Colin, Marc
• Colin, Philippe
• Colin-Morey
• Coutoux, Michel
• Dampt, Daniel & Fils
• Dancer, Vincent
• Darviot-Perrin
• Dauvissat, Jean
• Dauvissat, R & V (also Vincent Dauvisssat, also Dauvissat-Camus)
• Defaix, Bernard
• Defaix, Daniel-Etienne
• Defaix-Raveneau
• Delarche
• Deleger, George
• Demessey
• Deux-Montille
• Doudet-Naudin
• Droin, Jean-Paul
• Drouhin
• Druid
• Dublere
• Dubois, Jean-Luc
• Duplessis, Gerard
• Ente
• Ente, Benoit
• Faiveley
• Fevre
• Fichet
• Fontaine-Gagnard
• Gagnard, J.N.
• Gagnard-Delagrange
• Genot-Boulanger
• Germain, Henri
• Girardin, Vincent
• Grivault
• Grux, Franck
• Gueguen, Frederic
• Guffens-Heynen
• Guyon, Antonin
• Jadot
• Javillier
• Jobard, François also: François et Antoine Jobard (2002 – 2006) & Antoine Jobard (2007 – )
• Jobard, Remi
• Jouard
• Juillot
• Laboure-Roi
• Lafon (Domaine des Comtes Lafon - Meursault)
• Héritiers Lafon (Héritiers des Comtes Lafon - Mâconnais)
• Lambrays (Domaine)
• Lamy, Hubert
• Lamy-Pillot, Rene
• Langoureau, Sylvain et Nathalie
• Laroche
• Latour
• Latour-Giraud
• Leflaive, Domaine
• Leflaive, Olivier
• Le Moine
• Leroy
• Long-Depaquit
• Magnien, Frederic
• Maltroye, Chateau de la
• Matrot, Joseph
• Matrot, Pierre (also Thierry Matrot)
• Matrot Wittersheim
• Meo-Camuzet
• Merlin, Olivier
• Meursault (Chateau de)
• Michel, Louis
• Michel, Rene
• Michelot
• Mikulski
• Montille
• Moreau, Bernard
• Moreau, Christian
• Moreau, Louis
• Morey, Bernard
• Morey, Jean-Marc
• Morey, Marc
• Morey, Pierre / Morey-Blanc
• Morey-Coffinet
• Niellon
• Pacalet, Philippe
• Pavillon
• Pernot
• Pillot, F&L
• Pillot, Jean-Marc
• Pillot, Paul
• Pinson
• Piuze, Patrick
• Potel
• Prieur
• Prieur-Brunet
• Prudhon
• Puligny-Montrachet (Chateau de)
• Ramonet
• Rapet
• Raveneau
• Remoissenet
• Robin, Guy
• Romanee-Conti
• Roulot
• Roumier
• Sauzet
• Servin, Domaine
• Thomas Moillard
• Tollot-Beaut
• Tribut
• Valette, Domaine
• Verget
• Vocoret
• Vogue, Comte de
• Vougeraie, Domaine de la