. Descriptions of new species of fungi. Fungi. been carried and have germinated. Many fungi of this class produce their winter spores on fallen leaves or twigs, for instance the black blotch fungus of maple leaves. It is probable that this currant fungus has some winter form on the dead vegetable matter about the bushes. Hence the remedy should be sought in burning the leaves that fall and any other rubbish that might harbor the fungus. A similar species Septoria rubi, West, is very common on blackber- ries all over the country. It produces roundish spots with a red or purple margin and a brow
. Descriptions of new species of fungi. Fungi. been carried and have germinated. Many fungi of this class produce their winter spores on fallen leaves or twigs, for instance the black blotch fungus of maple leaves. It is probable that this currant fungus has some winter form on the dead vegetable matter about the bushes. Hence the remedy should be sought in burning the leaves that fall and any other rubbish that might harbor the fungus. A similar species Septoria rubi, West, is very common on blackber- ries all over the country. It produces roundish spots with a red or purple margin and a brown center. DOUBLE BLOSSOM. "Double blossom" is the name given to a blackberry disease that is quite prevalent and destructive in some regions. It is a disease of the blossoms, as the name implies, but they are not actually double. The several5parts are abnormally swollen through the effect of the fungus, so that at a casual glance the flower appears double. It is killed of course and no fruit is formed. The mycelium runs through the tissue of the floral organs, swelling and distorting them, and at length sends out on the surface clusters of short, colorless threads, which bear the spores on their ends and produce a whitish, mealy appearance over the flower. The spores are slender and pointed, frequently curved, and divided by cross-partitions into two to four cells. This disease was first observed and studied by Mr. F. S. Earle. He sent specimens to Dr. Win- ter of Germany and the latter has recently des- cribed and published it as a new species, which he refers with doubt to the genus Fusisporium Figure 6-spores of double , 7. blossom fungus, Fusisporium and Calls ±i USlSpOrium rubl. ruhif on blackberry. (After Earle.) RASPBEBRY CANE RUST. The cane rust of raspberries and blackberries is rather inconspicuous but very destructive. It was first studied by Professor T. J. Burrill, who published an excellent account of it in the Agricultural Review for November, 1
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectfungi, bookyear1890
