BLACK STEM RUST OF WHEAT. 59 



As will be seen by coiuparing the figures in this table, with those in 

 Table 3 for the same varieties and the same year, (1) all the varieties 

 were as a rule more affected with the leaf rust than with the stem rust; 

 (2) Polish, (rharnovka, and other varieties that are quite resistant to leaf 

 rust seemed to be about as badly affected with the stem rust as any of 

 the others, while the Nortli Dakota wheats and a few others that were 

 badly affected with leaf rust were almost wholly free from stem rust; 

 and (3) the Australian varieties, wliich were all sent in by Mr. Farrer, 

 of New South Wales, and which are supposed to be bred and selected 

 with especial regard to resistance to this rust, performed their mission 

 quite well, all but Ladas showing only slight traces of the stem rust. 

 Another fact of importance in regard to the durum wheats is that the 

 stem rust affected all portions of the plant except the seed. The bread 

 wheats were not so completely affected except in a few cases. 



Pammel (55, pp. 408, 409) states that at the Iowa Agricultural Experi- 

 ment Station, in 1802, when this rust "was very destructive," the 



Fig. 1.— Healtlij' and slirivcleil grains of Jones Winter Fife harvested the same season in different 



parts of Kentucky. 



following varieties were badly rusted: Velvet Chaff', Johnson, Early 

 Eed Clawson, Golden Cross, James White Fife, and Poole, while Turk- 

 ish Red was, on the other hand, but slightly affected. 



Farrer (33, p. 36) noted several years ago that the same varieties 

 resist the two rusts in different degrees. Eriksson (31, pp. 340, 341 ; 27, 

 p. 249) also found in his experiments that often those varieties most 

 susceptible to P. glumarum were most resistant to P. graminis and 

 P. dispersa. In Victoria in the season of 1803-04 McAlpine tried a 

 number of varieties sent to him by Eriksson from Sweden, and the 

 results he obtained showed well the differences in susceptibility of the 

 same varieties to different rusts. Though the varieties were recom- 

 mended as being quite resistant to P. (jlmnarum in Sweden, they were 

 badly affected with P. rubigo-vera in Victoria. The matter was dis- 

 cussed in detail by McAlpine before the Fourth Intercolonial Rust-in- 

 Wheat Conference of Australia»(52, p. 27), and also by Eriksson in an 



