VIII 
Journal of Agricultural Research 
Vol. II 
Mutation in Egyptian Cotton 
Page 
Plate XVII. Field of Egyptian cotton (Gila variety) in blossom at the Coop¬ 
erative Testing and Demonstration Gardens, Sacaton, Ariz., on July 15, 
1913.. 302 
Plate XVIII. Fig. 1.—A plant of the Yuma variety of Egyptian cotton, photo¬ 
graphed on July 15, 1913, showing the well-developed vegetative branches 
and the rather poorly developed lower fruiting branches. Fig. 2.—A plant 
of the Pima variety of Egyptian cotton, photographed on July 15, 1913, 
showing the absence of vegetative branches and the presence of well-de¬ 
veloped fruiting branches at the low nodes on the axis. Fig. 3.—A plant 
of the Gila variety of Egyptian cotton, photographed on July 15, 1913, 
showing in comparison with the Yuma variety (PI. XVIII, fig. 1) a smaller 
development of the vegetative branches. 302 
Plate; XIX. Leaves of the Yuma variety of Egyptian cotton taken from the 
main stem and showing the strong tendency in this variety to produce 
5-lobed leaves. 302 
Plate XX. Leaves of the Pima variety of Egyptian cotton taken from the main 
stem. 302 
Plate XXI. Leaves of the Gila variety of Egyptian cotton taken from the 
main stem. 302 
Plate XXII. Involucres of Egyptian cotton. Fig. 1.—Nubari variety. 
Fig. 2.—Yuma variety. 302 
Plate XXIII. Involucres of Egyptian cotton. Fig. 1.—Pima variety. 
Fig. 2.—Gila variety. 302 
Plate XXIV. Bolls of Egyptian cotton. Fig. 1.—Nubari variety. Fig. 2.— 
Yuma variety. Fig. 3.—Pima variety. 302 
Plate XXV. Bolls of Egyptian cotton. Fig. 1.—Mit Afifi variety. Fig. 2.— 
Gila variety. Fig. 3.—Big-bolled strain of the Gila variety. Fig. 4.— 
Sakellaridis variety. 302 
Fruit-Rot, Lear-Spot, and Stem-Blight or the Eggplant Caused by 
Phomopsis Vexans 
Plate XXVI. “Damping off ** of seedling eggplants which had been sprayed 
with organism No. 113 (Phyllosticta hortorum) . 338 
Plate XXVII. Seedling eggplants from the pot shown in Plate XXVI, show¬ 
ing the presence of pycnidia and the effect of the fungus on the stem.... 338 
Plate XXVIII. An eggplant leaf sprayed with organism No. 104 (Phoma 
solani), showing the characteristic spots and pycnidia formed therein.... 338 
Plate XXIX. Fig. 1.—An eggplant fruit produced by a plant grown on the 
Potomac Flats and mummified as a result of spraying with organism No. 104 
(Phoma solani). Fig. 2.—A photomicrograph of a cross section through 
pycnidia formed on the calyx of an eggplant. 338 
Plate XXX. A section through the fruit of an eggplant which had been sprayed 
in a moist chamber with organism No. 113 (Phyllosticta hortorum) . 338 
