SOME NEW SUGARCANE DISEASES 



BY 



E. J. BUTLER, M.B., F.L.S. 



Impp.riul Mycnlngist, 



AND 



ABDUL HAFIZ KHAN Lm^... <T 



Assiatant to ihp. Imjierial Mycologist. NEW VOR?: 



eOTAN.A^ 



Qa.v:l):.. , 

 I. -Wilt. 



(Cephalofijyormm Sacchari Butl. n. sp.) 



In the course of investigations of the red rot of suo-arcane 

 caused by CoUetotrichimfalcatum Went, a second disease, to which 

 the name red rot might equall}^ well be applied, since it pro- 

 duces distinct reddening of the cane pith, has frequentty been 

 encountered. With a little practice the two diseases can be dis- 

 tinguished and they are caused by entirely distinct organisms. 



As in red rot, the earlier symptoms are elusiv^e. Except 

 in such cases of severe infection of the cuttings selected for 

 planting as cause the death of the young shoots, in the manner 

 more fully referred to below, little is noticed until the cane is 

 about half grown. At this period affected canes lag in growth and 

 stunted, single stools, or patches of varying size, may soon be 

 observed scattered through the fields in which the disease is 

 prevalent. From this on until the time of harvest, w^therino- of 

 individual canes, or even of whole stools, occurs. The leaves dry 

 up, as if insufficiently supplied with water, followed by the stems, 

 which become light and hollow. If the cane be split longitudin- 

 ally when the leaves are first observed to wither, a charac- 



