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Maintenance of gardens: a permanent struggle against the attacks of parasites.

Essential element of French gardens, the border of box trees is ideal to mark the outline of a flower or a vegetable garden square.
At la Roche Courbon, we have almost 2000 meters of small box hedges, which have the advantage of slow growth and are cut once a year in April. Of the family Buxaceae, these shrubs can live several centuries
In recent years, new diseases are emerging on these species. This is the combined attack of two specific fungi boxwood.
Other gardens such as Versailles, Vaux le Vicomte, Villandry suffer the same attacks, and thanks to the advice of their head gardeners, we began to change more than 900 feet to replace them with "sempervirens arborescens".
Sick feet were burned and the soil was changed.

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Instructions not to spread cylindrocaldium buxicola (fungus that grows on the box):
(Synthesis symposium organized on the box tree at Vaux Vicomte on March 4th, 2015)
First signs: black spots on the stems
Below 12 °C: limit of the inoculum on the sempervirens.
Caution: automatic sprinkler irrigation is very bad (maintenance of the moisture).
DO NOT USE THE BLOWER, CLEAN CLOTHES, SHOES AND TOOLS AFTER TRIMMING SHRUBS.
The Tétroconazol is effective, but stress the plant by promoting Volutella buxi.
Smartphone: AGIIR: application of participatory science to fight against invasive insects (borers boxes).
General advice: wait 3 to 4 years that INRA (national institute of agronomic  research) finds a suitable cultivar.
Do not rush ON NEW PURCHASES: PREFER grassed AREAS TO RECALL OF BUIS'LINING UP.
DO NOT COUNT ON THE SLACKENING OF THE RULES ON THE USE OF PESTICIDES.
Good luck to all... !