A Study of the Environmental Conditions Influencing the Development of Stem Rust in the Absence of an Alternate Host. IV. Overwintering of Urediniospores of Puccinia graminis tritici. V. The Period of Initial Infection of Urediniospores of Puccinia graminis tritici on Wheat. VI. Influence of Light on Infection and Subsequent Development of Urediniospores of Puccinia graminis tritici on Wheat

Authors

George L. Peltier

Date of this Version

11-1925

Document Type

Article

Citation

Peltier, George L. (1925). A study of the environmental conditions influencing the development of stem rust in the absence of an alternate host. IV. Overwintering of urediniospores of Puccinia graminis tritici. V. The period of initial infection of urediniospores of Puccinia graminis tritici on wheat. VI. Influence of light on infection and subsequent development of urediniospores of Puccinia graminis tritici on wheat (Research Bulletin: Bulletin of the Agricultural Experiment Station of Nebraska No. 35)

Comments

ISSN 0097-1366

Abstract

IV. In order to ascertain whether the urediniospores of Puccinia graminis tritici (Pers.) Erikss. and Henn. overwinter under the environmental conditions prevailing at Lincoln, Nebraska, a series of experiments was carried out extending over a period of 5 years. The results of this investigation are briefly presented. V. By the period of initial infection is meant the time required by a pathogen after it reaches a susceptible plant part to enter the tissues. To determine what the period of initial infection of urediniospores of Puccinia graminis tritici might be, experiments were undertaken during the season of 1923-24 using urediniospores of Physiologic Form XXI. VI. In order to determine the influence of light on initial infection and development of stem rust of wheat, a series of experiments were undertaken using a series of artificial light chambers. Seven-day-old seedlings of Little Club (C. I. No. 4066) were used and were inoculated with the urediniospores of Physiologic Form XXI.