CONTEXTS 



Page. 



I. — Miscellaneous diseases 7 



Disease of sedge caused by Kawakamia cyperi 7 



Introduction 7 



Description of the fungus 8 



Method of checking the disease 9 



Witches' -broom of bamboo caused by a newly discovered fungus, Lo- 



culistroma bambosae ■ 9 



General appearance of the disease 9 



Histological changes in the host 9 



Description of the fungus 10 



Discussion of related forms 10 



Technical description of the new genus Loculistroma 11 



Technical description of Loculistroma bambusae 11 



Diseases of two ornamental plants caused by species of Botrytis 11 



Disease of peonies caused by Botrytis 11 



Disease of chrysanthemums caused by Botrytis 12 



Disease of cyclamen caused by a variety of Glomerella rufomaculans 12 



Appearance of diseased material 12 



Cultural studies of the parasite 13 



Description of the new variety 13 



A new species of Stemphylium on oranges 13 



Cultures of the fungus 14 



Description of the fungus Stemphylium citri 14 



II. — Pineapple rot caused by Thielaviopsis paradoxa 15 



Introduction 15 



Synonymy of the fungus 15 



Discussion of the fungus 16 



Historical review of formaldehyde as a disinfectant and fungicide 16 



Apparatus used in the experiments with the fungus 17 



Control conditions and explanation of arbitrary units 19 



Cultural work on the fungus 21 



Experiments with petri-dish cultures 21 



Vitality of microspores and macrospores 28 



Inoculation experiments 30 



Experiments with fruit sprayed with spores of Thielaviopsis 33 



Effect of fumigation on the fruit 33 



Conclusions 34 



Summary 35 



Description of plates 38 



Index 39 



171 



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