Team:Bordeaux/Template:PolicyPracticesEconomy
The Bordeaux vineyard now covers 123,000 hectares for 270,000 hectares of farmland. Soils and Girondins basements are rather shallow. The Gironde, the Garonne and the Dordogne soften the climate and meet the water needs of the vineyard. Found on the left bank of the Gironde and Garonne gravelly, sandy, clay, from the erosion of the Pyrenees. On the right banks, soils are likely limestone and limestone. The warm ocean current of the Gulf Stream accentuates the temperate climate and the Landes forest forms a protective shield against the winds of the ocean.
In 2010, each hectar or grapevine had received around 16 chemical treatments (this number was 15 in 2006) and varies greatly between regions. Amongst the biological threats on grapevine, mushroom parasites are far ahead of insects and fungi (12 fungicides are used against 2 insecticides and 2 weedkillers). Over 95% of the fongicide treatments in 2010 were due to mildew and oidium, sicknesses that are favorized by rain, humidity and heat. They bring the global quality of the wine down by reducing it's composition in phenols and sugars The risc of contamination on the leaves begin during the period where the floral buds and futur grapes are growing and lasts until the moment when the grapes touch each other. The sensibility period between oidium and mildew have common momments and vinyards don't heasitate to mix anti-mildew and anti-oidium solutions making the concentrations of these chemicals twice more concentrated in the grounds. What are the problems with these treatments? Are they really efficient? To have a really efficient treatment what would you need? To try to see the effect that mildew has on wine producers iGEM Bordeaux contacted numerous castles in the region and attended the two biggest wine assemblies in Bordeaux: La foire au vin and Vinexpo. This allowed us to speak to the roducers on how much their production is threatened by oomycetes such as mildew and to see if thy would eventually be interested in an alternative preventive solution that would be eco-friendly. At the same time, this allowed us to search for sponsors in the region to raise money for our labwork to be continued ... Read more at http://www.lavigne-mag.fr/actualites/bordeaux-enquete-sur-une-attaque-imprevue-de-mildiou-105408.html#JrRQ87eWGid6OCFo.99 Downy mildew requires optimum conditions to reproduce and infect. A warm, moist, and humid environment is required. Studies in Sicily have shown optimum time for oospore germination is between the end of February and the middle of March. With this understanding, if fungicides are used just before these conditions occur, and have proven to be efficient measures. Other methods include proper watering, and a good location where the plant can receive continual sunlight. Economy
A bit of History
We can find lots of grapes :
Reds: Merlot, Cabernet Sauvignon, Cabernet Franc, Malbec, Petit Verdot.
Whites: Sauvignon, Semillon, Muscadelle, Ugni Blanc, Colombard.
15 is , on average, the number of treatments that had to make a winemaker in 2012 to fight against mildew.
11 ° C is the minimum temperature required for initiation of primary infections in the spring.
€ 246 per ha is the average investment of a winemaker in France in 2012 for his fight against mildew.
4 days this is the optimal time necessary to complete mildew its entire cycle from contamination by spore until the following sporulation.
1878 is the year when the mildew , Plasmopara viticola , was observed for the first time in France.
Treatments against mildew have a cost that varies between € 50,000 and € 164,000 per year.
little comics ?
iGEM Bordeaux: Contacting vineyards
