Response of Pisum sativum germplasm resistant to Erysiphe pisi to inoculation with Erysiphe baeumleri, a new pathogen of pea
Ondrej, M.(Agritec, Sumperk (Czech Republic)) | Dostalova, R.E-mail:dostalova@agritec.cz | Odstrcilova, L.
Cultivars, homozygous sources and lines of pea resistant to Erysiphe pisi had recently been attacked by another powdery mildew species, Erysiphe baeumleri, in the field and in glasshouse conditions. Inoculation with E. baeumleri was carried out in the glasshouse to evaluate the level of resistance of 16 pea genotypes. Susceptible pea lines produced abundant conidia and cleistocarps on petioles and leaves. Only the genotype Tudor (Cebeco 4119) was found to be completely resistant to E. baeumleri. Nineteen pea genotypes (with gene er-1) were tested to natural infection by E. baeumleri in field screening trials. Only few of them demonstrated a high level of resistance (Fallon, AC Melfort and Joel). Consort R, SGL 2024, SGL 1977 and Franklin were very susceptible to E. baeumleri. Susceptible control genotypes without the gene er-1 (Komet, Adept and Gotik) were attacked by E. pisi only.
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