Puccinia xanthii Schw. Life Cycle and Possibility to Overwinter in Bulgaria

E. MIRKOVA1, M. TODOROVA2 and V. NIKOLOVA1

1 Plant Protection Institute, BG-2032 Kostinbrod, Bulgaria
2 University of Forestry, Faculty of Agronomy, BG-1756 Sofia, Bulgaria

Abstract

MIRKOVA, E., M. TODOROVAand V. NIKOLOVA, 2000. Puccinia xanthii Schw. life cycle and possibility to overwinter in Bulgaria. Bulg. J. Agric. Sci., 6: 419-422

Puccinia xanthii (the causal agent of rust on Xanthium strumarium) is microcyclic autoecious rust. It forms only teliospores which are able to infect 3 days after the inoculation. There are suitable conditions in our country and Puccinia xanthii successfully overwinters on leaf debris in the open. Primary infections occur in the second half of may and the disease develops through the whole vegetation.

Key words: Puccinia xanthii, Xanthium strumarium, teliospores, life cycle