H ess than a month in Madrid had an episode of alarm contamination and associated with the large number of outbreaks suffered allergic to myself, because although I'm not allergic to pollen in This time I have been affected. 
The explanation is rather clear on the news that can be read here. The combination of pollen from Arizona with the compounds of air pollution are highly cocktail irritating. The coincidence of the pollination period Cupressaceae an anticyclonic period, has made air pollution levels soar and allergies as well. 
Arizona call several varieties of trees of the genus Cupressus obtained even by hybridization of different species. Cupressus arizonica is the most popular. They are not native species, which has not prevented that have been used for stocking, including sights such as the Pedriza de Manzanares, and stay there.
The Arizona are large trees with a tendency to taper, but not as regular as cypresses. Its main use is to form garden hedges, because they support very well to pruning to make way for true green walls. The rapid growth is a blessing for the new inhabitants of "villas" when they plant these trees, and sentenced to hard labor for life if you do not want that beautiful "hedge" is transformed into a soulless mass of branches, which reaches occupy half the garden. Cupressaceae
The explanation is rather clear on the news that can be read here. The combination of pollen from Arizona with the compounds of air pollution are highly cocktail irritating. The coincidence of the pollination period Cupressaceae an anticyclonic period, has made air pollution levels soar and allergies as well. 
Arizona call several varieties of trees of the genus Cupressus obtained even by hybridization of different species. Cupressus arizonica is the most popular. They are not native species, which has not prevented that have been used for stocking, including sights such as the Pedriza de Manzanares, and stay there. The Arizona are large trees with a tendency to taper, but not as regular as cypresses. Its main use is to form garden hedges, because they support very well to pruning to make way for true green walls. The rapid growth is a blessing for the new inhabitants of "villas" when they plant these trees, and sentenced to hard labor for life if you do not want that beautiful "hedge" is transformed into a soulless mass of branches, which reaches occupy half the garden. Cupressaceae
The female flowers have a spherical shape are called gálbulas and male cones appear ninúsculas entirely covering the ends of the branches. Those flowers, yellowish and flaky, produce millions of pollen grains is windblown clouds forming true. That amount is needed for some of them, come to the female flowers, which begin to open at the same time. So a lot of pollen is an ordeal for allergy sufferers who do not understand how it is that in winter they have such strong reactions. 
The trunk is scaly and very full of resin and burn very easily, so it is not recommended to place a hedge around Arizona a garden barbecue. Further, under arizonica should not park in the middle of summer then, almost certainly due to the heat, the resin will drip on it and will leave a difficult reminder clean on the body. To make matters worse, they are free of pests and often have large areas attacked by the disease or large bald produced by pruning mismatch. Even so, growers continue to recommend to the unwary who reach their first plants for the garden. Clever strategy to make the task of pruning or the subsequent sale of tools and care products.
I can not explain the success of this plant in residential areas, except for the lack of knowledge and imagination of the owners of the cottages. It's only allergies that produce both pollen inhalation from contact with leaves and branches squamous who come to producing hives, especially when you are doing pruning work would be sufficient. But it is also reported very few advantages, except, perhaps, to form a green wall that isolates us from the outside.
The style of pruning arizonica wall as smooth or geometric shapes is very old fashioned and often have little to do with the rest of the composition of the current gardens. The same sense of intimacy you get with these walls can be achieved with other species that provide more beauty and variety, such as flowers, fruits and different colors throughout the year, with much less work maintenance.
But for me, one of the worst things about the Arizona is hardly contribute to benefit birds, insects and other creatures of the environment. No bee or butterfly will come to sip and few birds make their nests on them or moss or lichen covered branches. They have holes for small animals looking for cache. Of course, now that I think, maybe that one advantage to urbanites who want no country house to stay in touch with nature, but to insulate themselves from anything having to do with her and others.
I can not explain the success of this plant in residential areas, except for the lack of knowledge and imagination of the owners of the cottages. It's only allergies that produce both pollen inhalation from contact with leaves and branches squamous who come to producing hives, especially when you are doing pruning work would be sufficient. But it is also reported very few advantages, except, perhaps, to form a green wall that isolates us from the outside.
The style of pruning arizonica wall as smooth or geometric shapes is very old fashioned and often have little to do with the rest of the composition of the current gardens. The same sense of intimacy you get with these walls can be achieved with other species that provide more beauty and variety, such as flowers, fruits and different colors throughout the year, with much less work maintenance.
addition, Arizona tend to be widening every year, each occupying more space, both into the garden and adjacent to sidewalks. Some of the hedges of the above photographs are nearly three meters wide. It's a totally lost, because the green zone occupies only two inches outside, the interior is a patchwork of styles. If you try to prune back plants to strengthen those walls, it would be to light the dry zone is no longer possible recovery.
But for me, one of the worst things about the Arizona is hardly contribute to benefit birds, insects and other creatures of the environment. No bee or butterfly will come to sip and few birds make their nests on them or moss or lichen covered branches. They have holes for small animals looking for cache. Of course, now that I think, maybe that one advantage to urbanites who want no country house to stay in touch with nature, but to insulate themselves from anything having to do with her and others.
How different is the concept of English hedge, with its mix of species, their range of varied resources for the fauna and flora. Another day I will devote an entry to make up for the negativity of today.
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