VI 
Journal of Agricultural Research 
Vol. XIV 
Can Biologic Forms of Stemrust on Wheat Change Rapidly Enough Page 
to Interfere with Breeding for Rust Resistance? 
Plate 13. Puccinia graminis tritici: A.—On seedlings of Bobs wheat (Cl 5047). 
B. —On susceptible first-generation hybrid, Haynes Bluestem (Minnesota 
169) X Kubanka durum wheat (Cl 2094). 124 
Plate 14. Puccinia graminis tritici: A.—On seedlings of Haynes Bluestem 
inoculated with rust from the susceptible parent—that is, Haynes Blue¬ 
stem. B.—On seedlings of Haynes Bluestem, the susceptible parent, 
inoculated with rust from the susceptible first-generation hybrid 16(2X3)1. 
C. —On seedlings of partially resistant durum parent, Kubanka (Cl 2094), 
inoculated with rust from the susceptible parent, Haynes Bluestem (Min¬ 
nesota 169). D.—On seedlings of partially resistant durum parent, 
Kubanka (Cl 2094), inoculated with rust from the susceptible first-genera¬ 
tion hybrid 16(2X3)1... 124 
Plate 15. Puccinia graminis tritici: A.—Inoculations made on plants of sus¬ 
ceptible second-generation hybrid of the cross emmer (Minnesota ii6$)X 
Marquis. B.—Seedlings of the susceptible parent, Marquis, inoculated 
. with rust from the susceptible second-generation hybrid 15(8X1)1. C.— 
Seedlings of the susceptible parent, Marquis, inoculated with rust from 
the stock cultures. D.—Seedlings of extremely resistant parent, emmer 
(Minnesota 1165), inoculated with rust from the stock cultures. E.—Seed¬ 
lings of extremely resistant parent, emmer (Minnesota 1165), inoculated 
with rust from the susceptible second-generation hybrid 15(8X1)1. 124 
Plate 16. Puccinia graminis tritici: A.—Susceptible second-generation plants 
from the cross Marquis X Kubanka (Cl 2094), inoculated with rust from 
the stock cultures. B.—Seedlings of susceptible parent, Marquis, inocu¬ 
lated with rust from the susceptible second-generation plants shown in A. 
C.—Seedlings of partially resistant parent, Kubanka (Cl 2094), inoculated 
with rust from the stock cultures. jD. —Seedlings of partially resistant 
parent, Kubanka (Cl 2094), inoculated with rust from susceptible second- 
generation plants shown in A..... 124 
Plate 17. Puccinia graminis tritici: A.—Seedlings of susceptible parent, 
Haynes Bluestem (Minnesota 169), inoculated with rust from stock cul¬ 
tures. B.—Seedlings of susceptible parent, Haynes Bluestem (Minnesota 
169), inoculated with rust from the partially resistant F 9 hybrid (4X3)8AA 
shown in C. C.—Seedlings of partially resistant F 9 hybrid (4X3)8AA 
inoculated with rust from stock cultures. D.—Seedlings of partially re¬ 
sistant parent. Kubanka (Cl 2094), inoculated with rust from stock cul¬ 
tures. E.—Seedlings of partially resistant parent, Kubanka (Cl 2094), 
inoculated with rust from partially resistant F 9 hybrid (4X3)8AA shown 
in C. 124 
Mineral Content of Southern Poultry Feeds and Mineral Require¬ 
ments of Growing Fowls 
Plate 18. Feeding utensils used in the feeding experiments with chicks: a, 
Beakers for the sour skim milk; b t container for the dry mash; c, container 
for grit or shell; d, container for the grain mixture; e, container for the green 
feed;/, rape used as green feed.. 134 
Two Important Introduced Parasites of the Brown-Tail Moth 
Plate 19. A.—Large wooden cage used for rearing parasites from imported 
brown-tail-moth webs. B.—Large rearing tray with cloth bottom, de¬ 
signed by Mr. W. F. Fiske, and used for rearing Apanteles lacteicolor and 
Meteorus versicolor from brown-tail-moth caterpillars. C.—Small single¬ 
web rearing tray with paraffin-paper bottom. 206 
