If we compare the fungal flora of America with that of European countries, we observe that the former equals, in its richness and the variety of its forms, that of the phanerogamous flora; it is probable, however, that, in the lapse of more or fewer years, this richness will decrease, in consequence of the extension of cultivation-as is illustrated, indeed, in what has already taken place in the more thickly peopled districts, as, for example, in the vicinity of New York."
"Fungi: Their Nature and Uses"
Mordecai Cubitt Cooke
Rotundifolia is remarkably resistant to the attacks of all insects and to fungal diseases.
"Manual of American Grape-Growing"
U. P. Hedrick
The qualities which commended it were: great productiveness; earliness, ripening in the North with Concord; exceedingly good health, being almost free from fungal diseases; great vigor, as shown by a strong, stocky growth and ample foliage; and almost perfect hardiness even as far north as Canada.
"Manual of American Grape-Growing"
U. P. Hedrick