Black Rot, Leaf Spot And Canker of Pomaceous Fruits
The book Black Rot, Leaf Spot And Canker of Pomaceous Fruits was written by author Hesler, L. R. (Lexemuel Ray) Here you can read free online of Black Rot, Leaf Spot And Canker of Pomaceous Fruits book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Black Rot, Leaf Spot And Canker of Pomaceous Fruits a good or bad book?
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Sphaeropsis Malorum Peck. Sylloge Fungorum 3:294. 1884. Several years ago Ellis (1880) studied the variability of Botryosphaeria fuliginosQ (M. & N.) E. & E. [= Sphaeria Quercuum Schw.], and came to the conclusion that this species really included at least eighteen so-called species. Among these may be noted, using Ellis's nomenclature, Sphaeria entaxia C. & E. [= Physalospora entaxia Sacc], S. viscosa C. & E. [■= P. viscosa Sacc], 5. erratica C. & E. [= P. erratica Sacc], Botryosphaeria pustul...ala Sacc, and others. Ellis found wide variation with respect to stromatic formation. Sometimes the perithecia were scattered and distinct, and again they were confluent and united in a stroma. Consider- able range with respect to the ostiolum is also noted by Ellis (1880). But, as stated by Ellis and Everhart (1892:547), certain forms of Botryo- sphaeria fuliginosa — those lacking a stroma — are removed to the genus Physalospora. It may be that under certain conditions P. Cydoniae develops a stroma, but such a tendency has not been observed; for this reason the generic name Physalospora is selected.
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