PLATE 1 
A. —Missionary strawberry affected with the Rhizoctonia hard brown rot. 
The blackish discoloration of the berry is due in part to the color of the sandy 
soil adhering. The particles of soil are held together and bound to the berry 
by the mycelium of the fungus. The brown discoloration due to the rot shows 
more clearly next to the calyx. 
B. —Cross section of the berry shown in A. Here the very dark brown band 
above consists of a rather hard felty mass made up of mycelium and host cells 
overlaid with black soil. The lighter brown layer of pulp shows to what point 
the fungus has penetrated. 
C. —Another Missionary strawberry characteristically marked as a result of 
infection by the Rhizoctonia. 
D. —Early stages of infection of berry with the hard brown rot. The true 
color of the rot is not masked by adhering soil in this case. 
E. —Green berry one-third grown attacked where it lay in contact with the 
soil. 
F. —Diseased immature berry from the Washington markets after shipment 
by express from Florida under refrigeration. Pure cultures of the Rhizoctonia 
were obtained from this berry by a transfer of diseased pulp. 
G. —Section of berry two days after inoculation with the Rhizoctonia by 
laying a piece of agar bearing mycelium on the surface of the berry. 
H. —Strawberry showing the tan brown rot caused by Pezizella. Note the 
. sunken area. 
I. —Green berry a short time after infection by Botrytis. Note the brown dis¬ 
coloration of the fruit beneath the gray mould. 
J. —Aroma strawberry from Arkansas affected with the Phytophthora Leather 
Rot. 
K. —Section of the same kind of berry showing vascular browning. 
Figures A to I from colored drawings by J. Marion Shull; figures J and K, from colored photographs 
contributed by Dr. D. n. Rose, 
