09/03/2010 - Mission - 46 ° 11'49 .97''N 7 ° 35'29 .28''E By mid-July, our larch seemed to believe in September and turned brown and lost their needles. We observed this phenomenon throughout the valley, it was more marked in the center between 1000 and 2000m. We thought the lack of water in dry sunny weather in July, but the spring was well watered, and trees close to water points also turned brown. Information taken from
Forest Service, the fungus Meria larch causing prematurely autumnal colors. This disease affects the hands which are stained yellow-brown and fall. The lower part of the tree is reached first, then the infection spreads to the summit. Meria laricis form of tiny clusters of spores detectable under a microscope, there is still winter on the fallen needles on the ground and can infest the tree again. It attacks only deciduous conifer but can kill young subjects, and encourage the emergence of secondary fungi on the most dangerous individuals weakened. It is primarily a spring and early summer wet as this year 2010, which promotes the appearance of this fungus.
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