. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 234 ASCOMYCETES. mouth pine. Accordinif to the observations of Kostrup in Denmark, and myself in various localities of Germany, this is a dangerous parasite on Pinus Strobus. It kills the needles and young shoots, and may devastate whole tracts of forest. The diseased needles become brown in summer, and fall ofi" during next winter. On them are produced apothecia containing club-shaped asci and paraphyses with bu
. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 234 ASCOMYCETES. mouth pine. Accordinif to the observations of Kostrup in Denmark, and myself in various localities of Germany, this is a dangerous parasite on Pinus Strobus. It kills the needles and young shoots, and may devastate whole tracts of forest. The diseased needles become brown in summer, and fall ofi" during next winter. On them are produced apothecia containing club-shaped asci and paraphyses with button- shaped ends. The eight spores of each ascus are at first unicellular, later apparently bi- cellular, and enclosed in a very mucilaginous coat. The asci have an average length of 120fJL, the spores 20jul, and when swollen 28 to 30 m. H. pinicola Brunch.^ forms linear apothecia on needles of Pinus sylvcstris. H. ericae In Tyrol and Northern Italy, this fungus causes a disease on Erica carnca. It is common and epidemic, causing death of the Fig. of ^cica carnea with apothecia of Hjipoderma ericae on the lower surface. 1, An entire and a dehiscing ascus ; a two-celled aseo- spore. (v. Tubeiif del.) Hypodermella. Similar to Hypoderma, except that the spores are pear-shaped and unicellular; they occur four in each ascus, and are shorter than it. Hypodermella sulcigena (Link)" has four long, club-shaped, unicellular spores. Eostrup regards it as parasitic on Pinus montana and P. sylrcstvis, its mycelium being found in living green needles, and causing their death. ' Hyp. laricis This is a new fungus of the larch- needle I'ouiid by Tubeuf on the Sonnenwendstein (Bavaria) in September, 1894. It was present in large quantity on larches on the upper part of the mountain, and was in every way so decidedly parasitic in character, that there is little doubt as to its being an epidemic disease. The full-grown needles on many of the foliar spurs
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
