ORANGE LEAF RUST OF WHEAT. 39 



call it, is said to be the i)riiic'ipiil disease with which farmers have to 

 couteiid, the wheats geueially regarded as rust i)roof are Muiidia IMssi 

 and Baiisi, but the former is not a very marketable sort. xVt the 

 Nagpur Experimental Farm experiments were made in 1895 (12, pp. 

 19-21) to test the comparative liability to rust of four varieties, includ- 

 ing Mundia Pissi, and a similar series was planned in 1897 (13, pi). 

 22-24) with eight varieties, including ^lundia I'issi and Bansi. As 

 but little rust occurred on any of these varieties experimented with, 

 no conclusions could be drawn. Twenty-nine of Farrer's crosses were 

 tried in 1897. The 2G of these that came to maturity were very late 

 in ripening and rusted badly, though no other varieties were rusted. 

 The rust, liowever, did not injure the grain. 



A variety, supposed to be from America, was tested at theCawnpore 

 Experimental Farm in 1890 (.')7, pp. 22, 23) and remained entirely free 

 from rust, while the conunon sort, Muzaffarnagar, beside which it was 

 grown, rusted here and on other lields of the farm. Judging from the 

 description of the variety, however, it is probably not of American 

 origin, but a durum wheat, perhaps from the Mediterranean region. 



Bust-free varieties for the United States. — Before leaving this subject 

 some suggestions may be given concerning rust-free varieties for this 

 country. By reference to Table 3 it will be seen that after discarding 

 all that are not true bread-wheat varieties there is really little differ- 

 ence, so far as rust is concerned, in the sorts tested by this Department 

 in 189G and 1897 or in many of those tested in 189.5. This is due chietly, 

 if not wholly, to the late seeding. ^Nevertheless, in case of most of the 

 varieties in 1895, and even in the next two years, if the maximum of 

 rustiness to be tolerated is raised considerably (to about 40 per cent), a 

 number of bread wheats remain fairly rust resistant. 



Judging from all the experiments Jind observations discussed, the fol- 

 lowing varieties, already well known and good standard sorts in other 

 directions, ma}^ be recommended as likely to prove considerably resist- 

 ant to orange leaf rust in every part of this country, provided, of course, 

 that they are sown in time : 



Winter wheats: 



Turkey. Rieti. 



Mennonite. Odessa. 



Pringles No. 5. Pringlea Defiance. 



Spring wheats": 



Hayiies Blue Stem. Saskatchewan Fife. 



The following varieties seem to be resistant, but have not yet been 

 well established as such : 



Theiss. Fulcaster. 



Oregon Club. Deitz Longberry. 



Sonora. • Arnolds Hybrid. 



Diehl Mediterranean. California Spring.' 



'Although according to name a spring variety, it withstands the winter quite well. 



