xni.A.6 Reinking: Philippine Economic-Plant Diseases 273 



17. Rhizoctonia. Mycelium from sclerotial body, growing in pure 



culture (X 340); a, formation of sclerotial body; b, portions 

 of sclerotial body. Isolated from Glycine max (Linn.) Merr. 

 (G. hispida Maxim.). 



18. Peronospora. On Glycine tnax (Linn.) Merr. (G. hispida M&xim.) . 



a, portion of t5T)ical branched conidiophore ( X 320) ; b, conidia 

 (X 320). 



19. Uromyces sojae Syd. Uredospores (X 315). 



20. Lasiodiplodia theobromae (Pat.) Griff, et Maubl. Section through 



diseased sweet potato, showing pycnidium, ostiolum, paraphyses, 

 and immature spores (X 270). 



21. Bacillus solanacearum Erw. Smith. Cross section of tomato stem, 



showing xylem tubes completely filled with bacteria (X 350). 



22. Section through diseased abaca leaf, in heart of plant, showing 



mass of bacteria in tissue (X 330). 



23. Phytophthora nicotianae Breda de Haan. Section of damped-off 



stem of tobacco, showing mycelium penetrating throughout the 

 tissue (X 310). 



24. Cercospora nicotianae Ell. et Ev. a, group of conidiophores, two 



of which are germinating ( X 340) ; b, germinating conidia 

 (X 340). 



25. Ustilaginoidea virens (Cke.) Tak. a, spores (X 1,800); b, ger- 



minating spores (X 1,800). 



26. Cercospora lussoniensis Sacc. from Phaseolus lunatus Linn, a, 



group of conidiophores ( X 340) ; b, germinating conidia ( X 

 340). 



27. Woroninella psophocarpi Rac. a, cross section of gall from leaf, 



showing production of sporangia (x 80) ; 6, sporangia (X 325) ; 

 c, zoospores ( x 325) . 



28. Baker opho7na sacchari Diedicke. Various types of conidia ( X 



1,000). 



29. Cercospora on Sacchainim officinarum Linn, a, group of coni- 



diophores (X 320); b, conidia (x 320); c, conidia (x 640). 



30. Melanconium sacchari Massee. a, mass of conidia, composing 



hairlike strand (x 300); b, conidia (X 900). 



31. Puccinia kuehnii (Krueg.) Butl. a, uredospores ( X 320) ; b, 



germinating uredospores (X 320). 



32. Ustilago sacchari Rabh. a, spores (X 340) ; 6, germinating spores 



with promycelia (X 340); c, sporidia (x 340). 



33. Phytophthora faberi Maubl. a, chlamydospores (X 325) from 



pure culture; b, conidium (x 325) from pure culture; c, conidia 

 ( X 325) from surface of diseased fruit. 



34. Fusarium theobromae App. et Strunk. a, portion of conidiophore 



(X 315); b, microconidia (x 315); c, macroconidia (x 315). 



35. Nectria bainii Massee. var. hypoleuca Sacc. a, asci with ascos- 



pores (X 325); b, ascospores (X 650). 



36. Lasiodiplodia theobromae (Pat.) GrifF. et Maubl. from cacao. 



a, young conidia ( X 350) ; b, germinating young conidia 

 ( X 350) ; c, mature conidia ( X 350) ; d, germinating mature 

 conidia (X 350). 



