The fungus Armillaria mellea is a serious problem in arboriculture, it kills large numbers of trees in both orchards and in afforestation. It all begins with a spore in the wind. If on a small wound in the bark of a tree base sensitive, germinates and begins the nightmare. The germinating spore gives rise to a white mycelium that grows like a web beneath the bark and feeds on the cambium under bark. In its growth has a predilection for roots and respects the bark and branches, ie, attacks the underground parts of the tree.
I had a fig tree "Coll de Dama Negra" I was so upset that for several years gave very few figs, which ripen well, they looked appetizing, but tasted nasty to rot. The leaves were small, yellowish, and in small numbers. Each fall out a good bunch of Armillaria mellea mushrooms at the base of the trunk. One spring there was a miracle and came out big sheets with unusual vigor, in late summer gave a large crop of figs taste great and no more mushrooms out again at its base. It has been 15 years and the fig tree is huge and fully recovered.
Fight this silent killer is totally ineffective. There is no point starting the infected trees, burn their trunks and roots, plowing, treating the soil with fungicides, biological methods used to fight enemies of Armillaria microorganisms entering the field and attack the mycelium.
Apparently all these methods at first seem to work, but the vast mycelium of several tons, which occupies the ground as a giant underground and invisible web that reaches to cover several acres, is always the best cards to win the game. Cleverly hidden under the protective bark of infested roots or spores remain dormant for years without germinating. Once the danger has passed, when fungicides and have become inactive by oxidation or chemical neutralization or when biological control organisms have died from lack of food (her, its mycelium), then reviving like the phoenix and again do what he does best: killing all plants survive unprotected to be put forward.
So bad and cunning is the honey mushroom.