HARD RED WINTER WHEATS IN DRY AREAS 37 
Taste 20.—Average winter survival of 38 varieties and strains of winter wheat 
grown at eight experiment stations in the Great Plains area during three or more 
years in which partial winterkilling occurred in the 15-year period from 1908 to 
1922, inclusive, compared with that of the Kharkof variety for the same station 
years 
Winter survival (per cent) 
C.I. No, | Station 
Class and variety Difference 
Var iety Kh arkof, 
pamed same 
ears Less Greater 
ard red winter: 
LEV ASH LO) Ce Mes a at atc Te Og es te a 38 GASH Keak yer ee SSI, elias ule. SNe 
Ab enbadkted | ee cc 2979 11 61.3 70. 0 Sia] See 
ANG ARAS te 82 ge 8 Og BRE a cs Bias 5797 4 63. 8 OO SO" [aces Sake 4.5 
Altomeess 820 Ra ese Mga ERR ee 1438 16 68. 6 72. 4 Sitch Hee eee eee 
Armavir (selection) ____...---_------_- 1355-2-2 8 55. 6 63. 3 el |e ae 
Belomlinay® (22290 awe Sees ee 1543 22 60. 4 5950) | goa eee 1.4 
LED Sy MM SN I 8 eee. ae 1667 3 62. 3 OOF fe ec eee 2.6 
Bilackaralts 12 $28 Bagh P68 8 ee 6251 5 42.8 52. 8 LOS Ose ee 
@rimedmes 0 eae tags F380 ee 1432 9 65. 3 64520 Be ages El 
ID yay es CEE See Re ee Bee 1435 3 70. 0 68505 /E2 ec eee 2.0 
DORE eee Pee Nae eee 1436 8 80. 8 83. 0 Qe De eee eee 
TD) ge = ean Ne NPE Ee ae 1437 15 73. 8 CB CRRUGEE 1 
| DJQS 3h) Spreteemeae soe 20 be: Ue os ip Ry Ti 1559 14 68. 5 (7 3.6) ee 
WMELSOlO Hs w= 2 2 Peeh ey SR IRS oe 3011 3 24.7 27.3 Cs ON Wea ee ae 
(eamrneaet 82205 ob Sab eet Se 8 a8 5146 16 62. 7 64. 2 P5h| > eens 
anno nie OSE ae BD 6700 8 65. 5 GUS acne SA 
eR an KOPEe Ce: Eee a es Se R ek REE S 1442 21 GPS aR a RR OND Sg Ut Pe 
Kharkof (selection No. 6P2) _____-__-- 1442 3 92. 0 CS PAO el |: I ERE ene 
iGiiapkoiee 5 ae ee Ae ee ea 1583 21 69. 3 69. 8 5 Dig] bs Shc ome 
dB 0 aap, APM ii ae an Ne 4207 8 82. 1 MGR Sule... aioe 5.3 
Wal aleoie sh ee eines Be apa 2208 12 70. 4 74,1 Sie ee 
TAY Cray AB belch) pS are AR 0 ol Phare aaa INK Oe Obs 6155 8 59. 3 BOs A RR AE 3.9 
INEGI UG ATIR INO srs On ee ee ee 5549 6 66. 3 70. 0 Se (is oemames sae Se 
ROCISEUIISST QT cee esa ee Rese eee RS 1532 9 60. 8 64. 2 Orb ELS ote ga = 
Serbian (Selection No. 4-1-10)________- 1728 3 68. 3 76. 7 8i49/Fieet Jere 
TERT LSS see emer aa ent een ei SUR Ne ae 1561 5 58. 0 eS |e ee Sea ee 2, 
ROLL OV Ase ae. eee enn ek aan Lae Fore 1539 3 79. 0 (feosieta ad ea Rees i 
HINT WG eres ay epee Ree te PE 1558 12 59. 2 62. 5 Sx oye eso ae 
YD Xo yes Bees iy tan poke a pct el ig 1571 28 64. 9 67.9 3508 Soe 
PES RIES A ES sD 2943 4 63. 8 69. 3 HASt | Pse sao 
DOs ace Vee ST ke | 2998 10 69. 3 70.5 TDN oe ere 
DOE Ee er Pees Bet ea ake 3055 6 62. 2 Oy Al (ara So ibe 74,6) 
TDG) SSS SRI RI ie hg FN Ss 3084 9 61. 7 SOS On ease ees AE 7, 
Murkeya(Gratvon)=-2e ee 3696 3 36. 0 DIED. ewe eee 8.7 
Soft red winter: 
TERTIUS INO oiled ceo eee cots es ae 3330 19 75. 2 G47 0; sess es I Be 
Diehl-Mediterranean____-__-_____-___- 1395 5 69. 8 73. 8 AN 5/Gexe eae 
Minima anGhing ose tae Ea 5149 6 65. 7 DANS y term Celtel 0.9 
INiebraska; NO: 28cts4e 500 Sb eet ee 5147 5 63. 8 74. 6 TOL Shp sae eae 
STEM-RUST INFECTION 
Stem rust (Puccinia graminis tritict) is of common occurrence in 
the northern half of the Great Plains area. Fortunately, however, 
this disease usually is limited to the eastern portion of this section. 
In 1916 and 1919 very severe epidemics occurred. Some damage 
from rust occurs at a few of the stations nearly every year. In the 
southern half of the Great Plains area stem rust sometimes occurs 
but is not animportant factor in affecting the yields of winter wheat. 
Stem rust rarely occurs in the Great Basin and has not affected the 
yields of wheat reported in this bulletin. Stripe rust, which does 
occur there, causes very littleinjury. Winter wheat usually matures 
earlier and is better able to escape rust than spring wheat. When 
rust occurs on the varieties grown at field stations the percentage of 
infection usually is recorded. This is estimated by examining the 
wheat plants and comparing them with the standard scale shown 
in Figure 3. On this scale 100 per cent infection means that 37 
per cent of the surface of the culms is covered by rust pustules. 
