. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 191 Dimerosporium Fuckel (p. 189) Perithecia depressed-globose, membrano-carbonous; asci clavate to ovate, 8-spored; spores 2-celled, hyaline or brownish; mycelium abundant, dark, forming a film and often bearing conidia on conidiophores. D. mangiferum Sacc. does some harm to the mango. D. pulchrum, Sacc. grows upon the leaves of several woody plants, such as privet, Lonicera, Carpinus and Cornus. Conidia=Sarcinella heterospora. D. ct)llinsii (Schw.) Thiim., forms witches brooms on the service be
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 191 Dimerosporium Fuckel (p. 189) Perithecia depressed-globose, membrano-carbonous; asci clavate to ovate, 8-spored; spores 2-celled, hyaline or brownish; mycelium abundant, dark, forming a film and often bearing conidia on conidiophores. D. mangiferum Sacc. does some harm to the mango. D. pulchrum, Sacc. grows upon the leaves of several woody plants, such as privet, Lonicera, Carpinus and Cornus. Conidia=Sarcinella heterospora. D. ct)llinsii (Schw.) Thiim., forms witches brooms on the service berry. Lasiobotrys Kunze (p. 189) Fig. 138.—Dimerospo- Perithecia superficial, globose, minute, ^o n i dTife?Tscu^: black, aggregated in botryose fashion, stro- After winter.' mate; asci cyUndric, 8-spored; spores oblong, 2-celled, hyaline. The one species L. lonicerse Kze. forms dark coatings on honey- suckle leaves in Europe, North Africa and Siberia but does little or no harm. Zukalia Saccardo (p. 190) This genus is like MeUola except in its hyaline spores and in its perithecium. Z. stuhlmanniana is on seedling cocoanuts and other palms. Apiosporium Kunze (p. 190) Perithecia superficial, minute, globose to pyriform, membra- nous or carbonous; asci ovate to clavate, 8-spored; spores globose to oblong, hyaline; paraphyses none. Conidia=Torula, Fumago, Chaetophoma, etc. Several forms are known to constitute sooty coatings on leaves of woody plants, subsisting on insect secretions. The specific limitations in the genus have not been satisfactorily worked out owing to the comparative rarity of the ascigerous stages. A. salicinum. (Per^.) Kze. is common on leaves of many species of woody plants. Perithecia brownish, gregarious, globoid-oblong, composed of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stevens
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
