VIII 
Journal of Agricultural Research 
Vol.I 
Pi,aT 3 XXVIII. Sweet potatoes inoculated with Plenodomus destruens: A, 
Inoculated at the end; B , a section of A showing extent 
of rot; C, inoculated at the side; D, section of C showing 
the extent of rot. 
XXIX. Fig. i.*—A seedling of Hopi maize with mesocotyl 18 cm. 
long. Fig. 2.—The root system of a plant of Zuni maize 
dug from a field near Zuni, N. Mex., showing the well- 
developed, single seminal root and the comparatively 
feeble nodal roots. 
XXX. Fig. i.—A hill of Hopi maize containing 15 plants grown 
under conditions of extreme drought at the base of the 
First Mesa near Polacca, Ariz. Fig. 2.—A plant of Hopi 
maize. 
XXXI. Fig. 1.—A field of Zuni maize near Zuni, N. Mex. Fig. 2.— 
A hill of Zuni maize. Fig. 3.—A hill of Hopi maize 
making luxuriant growth under conditions of extreme 
drought. 
XXXII. Fig. 1.—A single plant of Navajo maize grown under irri¬ 
gation at Shiprock, N. Mex. Fig. 2.—The basal portion 
of the plant of Navajo maize shown in figure 1, with 
leaves and husks removed.. 
XXXIII. Fig. 1.—Pecan nuts infected with the anthracnose fungus by 
spraying with a distilled water suspension of conidia, 
showing the appearance nine days after inoculation. 
A, Four check nuts, two punctured with sterile needle 
and two unpunctured. B, Four nuts inoculated upon 
the unpunctured surface of the hull. C, Four nuts 
inoculated after puncturing the surface of the hull with 
a sterile needle. Fig. 2.—Three of the infected nuts 
shown in figure 1 after further development of the 
acervuli. 
XXXIV. Yellow Newtown apples infected by needle puncture with 
conidia of the anthracnose fungus from pecan and apple, 
showing appearance four days after inoculation. Fig. 
A .—Check apples punctured by sterile needle. Fig. B .— 
Apples infected by needle punctures with strain 150 from 
the apple. Fig. C.—Apples infected with strain 123 from 
a diseased pecan hull. Fig. D .—Apples infected with 
strain 125 from a diseased pecan hull. 
XXXV. Yellow Newtown apples infected by needle puncture with 
conidia of the anthracnose fungus from pecan and apple, 
showing appearance four days after inoculation. Fig. 
A .—Check apple punctured by sterile needle. Fig. B .— 
Apple infected with strain 125 from the pecan nut. 
Fig. C.—Apple infected with strain 123 from the pecan 
nut. Fig. Z>.—Apple infected with strain 150 from the 
apple. Fig. E. —Apple infected with strain 146 from the 
pecan leaf. Fig. F .—Apple infected with strain 158, a 
reisolation of strain 125 after passage through the apple.. 
XXXVI. Crown-gall (caused by Bacterium tumefaciens Sm. and 
Town.) on pecan nursery trees from southern Mississippi. 
Fig. 1.—The soft type of gall. Fig. 2.—The hard type of 
gall. 
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