270 "^he Philippine Journal of Science i9i8 



Plate VII 



Fig. 1. Coconut bud rot. Young infection. Bacteria entered in young 

 leaves at top. Note brownish line of demarcation at bottom and 

 sides of farthest advance of the disease tovi^ard the base. 



2. Coconut bud rot. Young infection starting in at young unfolded 



leaves at top. 



3. Coconut bud rot. Portion just below growing point in cabbage and 



young wood. Young infection. 



Plate VIII 



Fig. 1. Sterility of coconut fruit. 



2. False smut, or lump smut, of rice caused by Ustilaginoidea virens 



(Cke.) Tak. 



3. Leaf spot of coconut caused by Pestalozzia palmarum Cke. et Grev. 



4. Leaf spot of coconut caused by Exosporium dwum Sacc. 



5. Leaf spot of rice caused by Cercospora. 



Plate IX 



Fig. 1. Blight of beans, caused by Rhizoctonia. Note sclerotial bodies 

 of fungus on stems of plant. 



2. Blight of beans, caused by Rhizoctonia. Note sclerotial bodies 



of fungus on stems of plant. 



3. Blight of beans, Phaseolus calcaratus Roxb., caused by Rhizocto- 



nia. 



Plate X 



Fig. 1. Blight produced on various seedlings inoculated with a pure culture 

 of Rhizoctonia isolated from soy bean. 



2. Black rot of cabbage caused by Pseudomonas canipestris (Pammel.) 



Erw. Smith. Note blackening of vascular bundles and bundle 

 scars, also rot at base of stem. 



3. Rhizoctonia. Sclerotial bodies, a, from pure culture of fungus- 



producing blight of soy bean; 5, from blighted soy bean plant. 



Plate XI 

 Fig. 1. Heart rot of abaca. 



2. Leaf spot of banana caused by Mycosphaerella musae Speg. 



Plate XII 



Fig. 1. Bacterial wilt of tobacco caused by Bacillus solanacearum Erw. 

 Smith. Soil in foreground has been planted with tobacco for 

 two successive years. It is heavily infested with the bacteria. 

 The majority of plants have been killed. 



2. Bacterial wilt of tobacco caused by Bacillus solanacearum Erw. 



Smith. 



3. Leaf spot of tobacco caused by Cercospora nicotianae Ell. et Ev. 



4. Root galls of tobacco caused by nematodes, Heterodera radicicola 



Greef et Miiller. 



Plate XIII 



Fig. 1. Damping off of coffee seedlings caused by Rhizoctonia. 

 Figs. 2 and 3. Damping off of tobacco caused by Phytophthora nicotianae 

 Breda de Haan. Inoculated and control seed flats. 



