УДК |
Аннотация: Since 1957, the International Union of Forest Organizations, Sect. 24, has a working group studying what can be done about forets tree diseases that might be dangerous if the the pathogen moved great distances, as from one continent to another. The group was agreed to limit the scope of the work initialy to a few genera of forest trees. In 1958, it was proposed to start with the diseases of the genera Pinus, Populus, and Quercus. On the the basis of these lists, a joint list of parasitical fungi on species of the genera Pinus, Populus and Quercus, and a list of the hosts of the fungi have been made.
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