FIG. 77. 



CANE SUGAR. 



three or more. They are forme I within the top of a hypha and are rect- 

 angular and colourless. The complete description of this fungus is thus given 

 by Went : Thielaviopsis. Hypliae steriles hyalinae vel pallide fuscae, septatae. 

 HypTiae fertiles septatae non ramosae. Macroconidia ovata, 

 fusca, catenulata, mox secedentia. Microconidia cylindracea 

 vel bacillaria, hyalina, in interiore hypharum catemulatim 

 generata et mox ex apice exsilientia. T. ethaceticus. 

 X 325 Macroconidia 16 19 X 10 12, microconidia 10 25 



FIG. 76. =3,5 5, in interiore hypharum 100 - 200 ^ long. 



Habitat in culmis, fructibus, foliis in imula Java. This organism is 

 cosmopolitan. 



In Fig. 75 are shown photographs of sound canes and of canes attacked 

 l3y this fungus ; in Figs. 76 and 77 are shown the macro-and micro-spores. 



8. Cytospora sacchari. 29 This organism has been 

 observed by Butler, probably as a parasite of sugar 

 cane in India; canes attacked resemble those attacked 

 by rind fungus, and it is stated by Butler to be pro- 

 bably of only minor importance. 



The technical description of this fungus is: Cytos- 

 pora sacchari. Butler. Stromatibus verruciformibus seriatim ordinates, 

 subcataneo-erumpentibus, plurilo-cularibus, nigris, osteolo elongato, 

 |?^ 8wgulo reiriis, duobus praeditis ; sporulis minutissimis, cylindraceis, 

 curvulis, utrinque obtusis ; 3~5 X 1'5 microns; basidiis ramosis 

 septatis, 12 18 microns. Hob. in culmis vaginisque sacchari 

 officinarum India. 



In Fig. 78 are shown (after Butler) the spores of 

 this fungus, and in Fig. 79 a part of the diseased stalk. 



9. Diplodiacacaoicola.^ P. Henn. This organism, 

 which is known chiefly as a disease of the cacao tree 

 and pods, was observed by Howard in the West Indies 

 to be also parasitic on the cane. The appearance 

 of canes attacked by this organism is similar to that 

 occurring in attacks of rind fungus. Affected canes 

 have a shrunken appearance, and on the rind appear 

 little pustules, from which hairs eventually exude ; in 

 dry weather the hairs do not appear, the spores showing 

 as a blackish crust on the outer surface of the cane. 

 Howard succeeded in infecting canes with pure cul- 

 tures of this organism, which has also been observed 



by Butler 29 on cane in India. The technical description of this organism 

 is : Pustulis prominalis nigris sporulis oblongis breniculeatis ; cirri's nigris 

 12 X 5. 



x 580. 



FIG. 78. 



Natural Size 



FIG. 79. 



150 



