ILLUSTRATIONS 
[From photographs by Lee and by Cortes.] 
Plate I 
Fig. 1. The sterile mycelium stage and pustule stage of Corticium salmoni- 
color B. & Br. The white advancing mycelium is also shown. 
Natural size. 
2. Corticium sahnonicolor in culture upon potato plug; in culture and 
occurring naturally the color is the most characteristic feature 
of this fungus in its sterile stages. Natural size. 
Plate II 
Fig. 1. Early stage of pink disease on Citrus, showing guifiming and first 
appearance of pustules. Natural size. 
2. Showing the color of the sterile mycelium and advancing hyphae 
of Corticium salmonicolor. Natural size. 
3. Necator stage of the fungus on Citrus twigs. Natural size. 
4. Another specimen, showing Necator stage of the fungus on Citrus 
twigs. Natural size. * 
Plate III 
Showing early appearance of Corticium salmonicolor on Citrus; the pustule 
stage. Natural size. 
Plate IV 
Fig. 1. Early stages of surface mycelium of Corticium salmonicolor on 
Citrus sp. Natural size. 
2. A specimen similar to that of fig. 1; also showing gumming. 
Natural size. 
Plate V 
Effect of pink disease on tree of Citrus maxima in nursery row. 
Plate VI 
Fig. 1. Showing effect of pink disease on tree of Washington navel {Citrus 
sinensis) . 
2. The pink disease as it spreads up and down branches; in this 
case on Washington navel tree. 
Plate VII 
Fig. 1. Tree of Citrus sinensis killed by pink disease. Lamao, Bataan, 
P. I. August 16, 1918. 
2. Another view of orange tree killed by pink disease. Lamao, Ba- 
taan, P. I. 
text figures 
Fig. 1. Orchard A, Lamao, showing location of Corticium cases in October, 
1917. 
2. Orchard A, Lamao, showing location of Corticium cases in August, 
1918. 
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