Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Studies on crown rust and stem rust on Oats in Israel.

Abstract

It is reported from the Hebrew University, Rehovot, that recurring crown rust (Puccinia coronata) [22, p. 474] and stem rust (P. graminis) [31, p. 146] epiphytotics cause severe damage to oats in Israel. The 1st disease usually appears in Mar., the 2nd in Apr. Up to 150 vars., including many from abroad, were tested in the central coastal plain (Mikveh Israel), and in nurseries in different regions of the country. In varietal trials during 1951-56 the Brazilian var. Saia and the Minnesota selections 11-47-12, and 11-47-17 were very resistant to both rusts. The local oat selection Eehovot showed extremely high resistance to P. coronata under field conditions. The so-called Canadian factors for oat stem rust resistance were effective in all tests in the greenhouse and field plots at temps, below 28° C. The P. coronata races 264, 270, and 276 prevailed, the first 2 originating in Israel. P. graminis race 6 comprised about 97% of the identified isolates. There is a similarity of crown rust races predominant in Israel to those reported from Argentina [37, p. 405]. The importance of the ubiquitous wild oats (Avenae sterilis) in the dissemination of both rusts is emphasized. Rhamnus alaternus and R. palaestina [22, p. 474] play an important part in the life cycle of P. coronata in Israel and gave rise to race 270.