Host and environmental effects on the infection of maize by Puccinia sorghi. II. Post‐penetration development

Abstract

SUMMARYThe numbers of pustules which subsequently developed on maize seedlings incubated at 5, 10, 15, and 20 °C and 100% r.h. were directly related to the temperature and length of incubation.The generation time was 16 days at 10 °C, 10 days at 15 °C, 7 days at 20 °C and 5 days at 25 °C. Increase in urediniospore production was observed with increase in temperature.Increase in the inoculum concentration up to 5 × 104 urediniospores/ml increased the number of resultant uredinia. However, further increases did not increase uredinia‐formation.