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Team:Toulouse/Project/project-context
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| - | <p class="texte">One of Europe Wonders is without doubt the | + | <p class="texte">One of Europe Wonders is without doubt the Toulouse Canal du Midi. Situated in the heart of our city and going through Southern France, our lab is only 5 minutes walk from the Canal du Midi. Everyone in the team could enjoy the quietness and loveliness of this charming place. Unfortunately, this heritage is threatened: a phytopathogenic fugus, Certocystis platani, is devastating the trees lining the Canal. </p> <br> |
<p class="texte">The situation is alarming : today the only actual solution is preventive tree cutting to stem the fungal epidemic. The consequences are disastrous. Not only for the beauty of the landscapes but it has also huge environemental, social and economic costs. Today, 42.000 plane trees are threatened, knowing that cutting and planting a new resistant tree is about €4000. </p> | <p class="texte">The situation is alarming : today the only actual solution is preventive tree cutting to stem the fungal epidemic. The consequences are disastrous. Not only for the beauty of the landscapes but it has also huge environemental, social and economic costs. Today, 42.000 plane trees are threatened, knowing that cutting and planting a new resistant tree is about €4000. </p> | ||
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Probably introduced in France by infected wooden munitions cases coming from United States of America in 1945, the fungus introduces itself inside the sain tree’s heart and blocks the sap flow and kills it in only 2 to 5 years. | Probably introduced in France by infected wooden munitions cases coming from United States of America in 1945, the fungus introduces itself inside the sain tree’s heart and blocks the sap flow and kills it in only 2 to 5 years. | ||
On the regulatory side, the July 31th 2000 modified ministerial order classes Ceratocystis as a harmful organism for plants. This order leads to a mandatory fight against the fungus. | On the regulatory side, the July 31th 2000 modified ministerial order classes Ceratocystis as a harmful organism for plants. This order leads to a mandatory fight against the fungus. | ||
| + | </p> <br> | ||
| - | + | <p class="title2">The fight<p> | |
| - | + | <br><p class="texte"> Regarding this imminent threat, some solutions emerged. | |
| + | <br>First of all, chemical fungicides were used. However, the community realized it was impossible to eradicate the whole fungus. | ||
| + | <br>Therefore, the French Institut National de Recherche Agronomique (INRA) created a new type of plane trees named Platanor which were resistant to the fungus infection. Unfortunately, this extreme measure could not save the already contaminated trees nearby the Canal du Midi. | ||
| + | <br>Today, the only option remains in the tree-cutting of the contaminated plane trees. Nevertheless, this previous solution is not optimal because of the high cost and the major ecological, touristic and social impact for our heritage. | ||
| + | </p> <br> | ||
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Revision as of 15:31, 8 October 2014
Project context
A threatened heritage
Project > Context project
One of Europe Wonders is without doubt the Toulouse Canal du Midi. Situated in the heart of our city and going through Southern France, our lab is only 5 minutes walk from the Canal du Midi. Everyone in the team could enjoy the quietness and loveliness of this charming place. Unfortunately, this heritage is threatened: a phytopathogenic fugus, Certocystis platani, is devastating the trees lining the Canal.
The situation is alarming : today the only actual solution is preventive tree cutting to stem the fungal epidemic. The consequences are disastrous. Not only for the beauty of the landscapes but it has also huge environemental, social and economic costs. Today, 42.000 plane trees are threatened, knowing that cutting and planting a new resistant tree is about €4000.
The Canal du midi
This ingenious masterpiece respects the environment in which it is harmoniously integrated since 1681 by Pierre-Paul Riquet. Characterized as a summit level canal, it culminates at 189 meters of altitude and permits the achievement of water through the sea. In December 7th, 1996, the UNESCO registers Le Canal du Midi on the list of world’s legacy. The canal du midi is today primarily used for tourism, recreation and housing. Busier than the Seine (Paris), it accounts for one fifth of French river tourism and 80 % tourists are foreigners. Boaters seeking for tranquillity, quietness and a unique environment mainly navigate over it.
Canker Stain
The first plane trees bordering the channel appeared lately after its creation in 1776. Resolving the erosion of riverbanks and the evaporation of the water, the planesimposes itself has a dominant and emblematic marrow. The wooded legacy is estimated to about 42.000 trees, it contributes to the landscape and aesthetic. The canker stain is a disease caused by Ceratocystis platani, a microscopic fungus that exclusively attacks Plane Trees. Probably introduced in France by infected wooden munitions cases coming from United States of America in 1945, the fungus introduces itself inside the sain tree’s heart and blocks the sap flow and kills it in only 2 to 5 years. On the regulatory side, the July 31th 2000 modified ministerial order classes Ceratocystis as a harmful organism for plants. This order leads to a mandatory fight against the fungus.
The fight
Regarding this imminent threat, some solutions emerged.
First of all, chemical fungicides were used. However, the community realized it was impossible to eradicate the whole fungus.
Therefore, the French Institut National de Recherche Agronomique (INRA) created a new type of plane trees named Platanor which were resistant to the fungus infection. Unfortunately, this extreme measure could not save the already contaminated trees nearby the Canal du Midi.
Today, the only option remains in the tree-cutting of the contaminated plane trees. Nevertheless, this previous solution is not optimal because of the high cost and the major ecological, touristic and social impact for our heritage.
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