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The twenty-first annual plant pathology field day
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THE TWENTY-FIRST ANNUAL PLANT PATHOLOGY FIELD DAY 27 June 1947 The Twenty-first Annual Field Day was held at the School of Agriculture, University College, Nottingham, Sutton Bonington, by permission of Prof. H. G. Robinson. Nearly fifty members and friends attended. The programme began at 11.30 a.m, with a demonstration of the soft-fruit plots used in training Inspectors for the Ministry of Agriculture's Certification Schemes. Mr Martyr then conducted the party on an interesting tour of the Horticultural Department during which there was a lively discussion on some of the diseases pre sent . The members were the guests of the School of Agriculture at lunch. After lunch the President of the Society, Prof. C. G. C. Chesters, thanked Prof. Robinson and his staff for their hospitality and for arranging a most interesting programme. In replying, Prof. Robinson outlined the developments which were taking place at the School of Agriculture. In the afternoon Dr A. R. Wilson gave an account, illustrated by exhibits, of methods for storing potatoes which he had seen in the United States. He also discussed the problems of potato storage under Engl ish conditions and the work that was being done on th em . Under th e expert guidance of Mrs N. McDermott a tour was also made of the potato plots. This proved of great interest, although it was somewhat curtailed by a thunderstorm. After tea in the Canteen most members returned to the potato plots where Dr Gregory demonstrated the results so far obtained on the spread of potato virus diseases. Members also took the opportunity of seeing other potato plots in which they were particularly interested . The party dispersed at about 5.30 p.m,
H. E. CROXALL Sec. Plant Pathology Committee
REVIEW North American Species of Mycena. By ALEXANDER H. SMITH. University of Michigan Studies, Scientific Series, vol. XVII. (Ann Arbor, Michigan: University of Michigan Press; London: Oxford University Press, 1947.) xviii + 52 I pp., 56 text-figures, 99 uncoloured plates. $6.00. With the increased use of the microscope in the study of the higher fungi ideas as to their classification have in recent years undergone a revolution, but are still in a state of flux. Many new genera ha ve been established, while, on the other hand, some old genera have been united on the basis of microscopic characters, as, for instance, the genus Rhodophy/lus, which includes all the pink-spored Agarics with angular or nodulose spores. One of the earliest genera of Agarics to be studied microscopically was Mycena, for many species of which Schroeter in 1889 described cystidia and spores. Since that time Mycena has been the subject of several revisions. Von Hohnel, in 1913, proposed a classification of the European species based on the characters of the cystidia, and Lange (1914 and 1936) divided the section Eumycena into two groups, Ciliatae and Granulatae, according as the cystidia were smooth and more or less pointed or rounded, with spines or finger-like
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THE TWENTY-FIRST ANNUAL PLANT PATHOLOGY FIELD DAY 27 June 1947 The Twenty-first Annual Field Day was held at the School of Agriculture, University College, Nottingham, Sutton Bonington, by permission of Prof. H. G. Robinson. Nearly fifty members and friends attended. The programme began at 11.30 a.m, with a demonstration of the soft-fruit plots used in training Inspectors for the Ministry of Agriculture's Certification Schemes. Mr Martyr then conducted the party on an interesting tour of the Horticultural Department during which there was a lively discussion on some of the diseases pre sent . The members were the guests of the School of Agriculture at lunch. After lunch the President of the Society, Prof. C. G. C. Chesters, thanked Prof. Robinson and his staff for their hospitality and for arranging a most interesting programme. In replying, Prof. Robinson outlined the developments which were taking place at the School of Agriculture. In the afternoon Dr A. R. Wilson gave an account, illustrated by exhibits, of methods for storing potatoes which he had seen in the United States. He also discussed the problems of potato storage under Engl ish conditions and the work that was being done on th em . Under th e expert guidance of Mrs N. McDermott a tour was also made of the potato plots. This proved of great interest, although it was somewhat curtailed by a thunderstorm. After tea in the Canteen most members returned to the potato plots where Dr Gregory demonstrated the results so far obtained on the spread of potato virus diseases. Members also took the opportunity of seeing other potato plots in which they were particularly interested . The party dispersed at about 5.30 p.m,
H. E. CROXALL Sec. Plant Pathology Committee
REVIEW North American Species of Mycena. By ALEXANDER H. SMITH. University of Michigan Studies, Scientific Series, vol. XVII. (Ann Arbor, Michigan: University of Michigan Press; London: Oxford University Press, 1947.) xviii + 52 I pp., 56 text-figures, 99 uncoloured plates. $6.00. With the increased use of the microscope in the study of the higher fungi ideas as to their classification have in recent years undergone a revolution, but are still in a state of flux. Many new genera ha ve been established, while, on the other hand, some old genera have been united on the basis of microscopic characters, as, for instance, the genus Rhodophy/lus, which includes all the pink-spored Agarics with angular or nodulose spores. One of the earliest genera of Agarics to be studied microscopically was Mycena, for many species of which Schroeter in 1889 described cystidia and spores. Since that time Mycena has been the subject of several revisions. Von Hohnel, in 1913, proposed a classification of the European species based on the characters of the cystidia, and Lange (1914 and 1936) divided the section Eumycena into two groups, Ciliatae and Granulatae, according as the cystidia were smooth and more or less pointed or rounded, with spines or finger-like