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Full-Text Articles in Life Sciences
The Symptoms Of Spindle Tuber And Unmottled Curly Dwarf Of The Potato, R. W. Goss
The Symptoms Of Spindle Tuber And Unmottled Curly Dwarf Of The Potato, R. W. Goss
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The differentiation of the virus diseases of the potato on the basis of symptoms is an important but difficult phase of the virus problem. A knowledge of the variation in symptoms due to environmental factors is necessary both in investigational work and in the practical application of our knowledge to the control of these diseases in the field. A fairly comprehensive knowledge of the masking effect of certain environmental factors upon the symptoms of the mosaic group has been obtained through the work of various investigators. Considerably less information is available concerning the effect of environment upon the symptoms of …
The Spindle-Tuber Disease As A Factor In Seed Potato Production, H. O. Werner
The Spindle-Tuber Disease As A Factor In Seed Potato Production, H. O. Werner
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The lines of experimentation that supplied the data herein reported, stated in very general terms, were as follows: (1) Tuber-line selection studies (2) Relation of environmental conditions to seed-potato production (3) Seed-potato strain trials of certified and uncertified stock (4) Spindle-tuber transmission experiments. Most of these general lines of experimentation will not be completely discussed as a unit in any one part of the bulletin. For the sake of clarity, consecutive thought, and elimination of repetition, data will be selected from any experiment for insertion and discussion under the most logical heading in any part of the bulletin. Unless otherwise …
Further Studies On The Effect Of Environment On Potato Degeneration Diseases, R. W. Goss, George L. Peltier
Further Studies On The Effect Of Environment On Potato Degeneration Diseases, R. W. Goss, George L. Peltier
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The identification of potato degeneration diseases in the field is extremely difficult owing to the number of diseases now described, their manifestation on different varieties, the combination of several diseases on the same plant, and the further splitting up of these combinations into separate diseases. The influence of environmental factors in intensifying or inhibiting the symptoms of these diseases also increases the difficulty of diagnosis. In the present investigation the effect of environmental factors has been studied with the purpose of determining the limiting factor or factors in the masking of the symptoms, in the hopes of simplifying a complex …
Potato Wilt And Stem-End Rot Caused By Fusarium Eumartii, R. W. Goss
Potato Wilt And Stem-End Rot Caused By Fusarium Eumartii, R. W. Goss
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The present study was undertaken to obtain more information regarding the pathogenicity of Fusarium eumartii and to compare its action with F. oxysporum, in order to distinguish between and to determine the relative importance of the diseases produced by these two organisms. An effort was also made to explain the many negative results of isolation studies reported by various investigators, as well as the inconsistent results often reported in studies of the transmission of wilt by infected tubers. Investigations dealing with the effect of certain environmental conditions on the occurrence of the disease were also undertaken. All of the …
Effect Of Environment On Potato Degeneration Diseases, R. W. Goss
Effect Of Environment On Potato Degeneration Diseases, R. W. Goss
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
During recent years much of the investigational work on the degeneration diseases of the potato has been directed toward the separation and identification of a number of diseases formerly grouped under the general names of mosaic, leaf roll, and "running out". Extensive studies have also been made on methods of transmission, host range, overwintering and the identification of the evasive causal factor. Investigations of this type, however, have progressed slowly because of the necessity of developing new methods of research, because of the complexity of the problem, and because of the lack of knowledge regarding the causal factors. Meanwhile there …