Latent periods of septoria tritici blotch on ten cultivars of wheat

Abstract

A field trial was carried out to determine the length of latent periods of Septoria tritici blotch on 10 cultivars of wheat After artificial inoculation of the flag leaves of all cultivars on a single date lesions of S tritici showing pycnidia were produced over intervals of 21 to 37 days (273 to 459C days) after inoculation Latent periods varied between the cultivars tested with cv Domino having the shortest and cv Regency the longest latent periods The period of symptom expression for the different cultivars varied from 0 to 11 days (0 to 122C days) with a mean of 50 (544C days) This research provides information that can be used to develop disease models and forecast systems to assist growers with disease control decisions