RUM^rARY. G!) 



thirty-seventh degree of north latitude and in portions of Texas and 

 California. The leaf rusts and the crown rust are proportionally more 

 important in the Atlantic and the Sonthein coast States. 



(4) The damage to wheat and oats from rust in this country i)roba- 

 bly exceeds that caused by any other fungous or insect pest, and iu 

 some localities is greater than that caused by all other enemies 

 combined. 



(5) As yet there is but little certainty concerning rust resistance, 

 which varies continually under different cojiditions. Heretofore in 

 testing varieties for rust resistance, little attention has been j)aid to 

 the species of rust concerned. 



(G) The following hardy prolific varieties of wheat can usually be 

 depended upon to resist orange leaf rust to a considerable degree: 

 Turkey, ]Mennonite. Odessa. Uieti, Pringles No. 5. and Pringles Defi- 

 ance, and fcu' early spring sowing Haynes Ulue Stem and Saskatchewan 

 Fife. Some of these varieties may be resistant to the black stem rust 

 also, but this has not beeu definitely determined. 



\7) The following varieties also resist leaf rust, probably in nearly all 

 cases: Theiss, Fulcaster, Oregon Club, Deitz Longberry, Sonora, Diehl 

 Mediterranean. Arnolds Hybrid, and California Spring. 



(8) Durum and poulard wheats are very resistant to the leaf rust, but 

 so far have been use<l chiefly in nniking macaroni. A few of the most 

 important of these wheats are, Arnautka, Taganrog, Beloturka, 

 Medeah, Gallands Hybrid, Petanielle Noire deNice, Chernuska, Cretan, 

 Missogen, and Nicaragua. 



(9) During two years when rust was very severe Einkorn, a variety of 

 Triticum monococcum, used for stock feed, remained absolutely proof 

 against the leaf rust. 



(10) So far as known, any ordinary variety of wheat may rust badly if 

 sown late, but the following, although susceptible to rust, may sometimes 

 escape it because of early maturity: Early May, Zimmerman, Early 

 Baart, xlllora Spring, Roseworthy, Yemide, Kathia, Canning Downs, 

 and Japanese No. 2. However, four of these — Early Baart, Allora 

 Spring, Koseworthy, and Canning Downs — are probably not sufficiently 

 hardy for northern latitudes; 



(11) Of the varieties of oats, Texas Rust Proof is commonly consid- 

 ered rust resistant in the Southern States, but to which of the rusts is 

 not known. In the Northern States the varieties more or less resistant 

 to black stem rust are Early White Russian, Great Northern, Tartarian, 

 and Fentons Rust Proof. 



(12) Experiments so far made with uredospores show that the orange 

 leaf rusts of wheat and rye do not transfer to hosts outside of the 

 genera Triticum and Secale, respectively, but that, on the other hand, 

 their nredo stages winter over readily in this country, beginning first 

 on self sown grain and probably later transferring to the regular fall- 

 sown crop. All farms should therefore be kept constantly and rigidly 

 free of volunteer wheat and rye. 



