TopMenuEN

Copper harms beneficial bacteria

Copper is an effective way to fight the fungal disease mildiou. However, spraying too much copper in the vineyard is not good for the soil and the water and this has been known a long time. Now researchers have discovered another problem with copper.

Spraying copper can affect the bacterial flora and the yeast population present on the grapes.

Guilherme Martin, a doctorate student at the University of Bordeaux, has investigated several different vineyards around Libourne and he has identified 44 different types of bacteria.

Some of these bacteria have the ability to protect against rot so it is a good thing to have these on the grapes. By spraying copper on the grapes you risk both to reduce the amount of bacteria and their beneficial properties. Using copper as copper sulphate apparently affects the bacteria more than using copper oxide.

Copper is permitted in organic vineyards but not more than 6 kg per hectare and year. For the sake of the environment, less should be used but certain years this is very difficult, like 2012 for instance. Read more on this on La Vigne.

Sandy soil in a vineyard in Castile and Leon in Spain

Sandy soil in a vineyard in Castile and Leon in Spain, copyright BKWine Photography

This post is also available in: Swedish

, , , ,

No comments yet.

Leave a Reply

  Subscribe to comments:

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Sign up for our Newsletter!

In The BKWine Brief:

Enter your email to get it:

 
Make your friends happy!

And us too. Share & Like this!

Subscribe!

Time to book a wine tour?

Travel on a wine tour with us to Bordeaux, Champagne, Douro, Tuscany, Piedmont, South Africa, Chile-Argentina, and much more...

We know more about wine — and about organising exceptional wine tours — and will give you a better, more extraordinary wine and gourmet experience.

Book your wine tour here with BKWine Tours. Now!

Book a wine tour!