408 Howard \ — On some Diseases of the 
2. The macro- and micro-conidial phase of T richosphaeria 
Sacchari , Massee, identical with Thielaviopsis ethaceticus> 
Went, causes a disease of cane-cuttings in the West Indies 
which is the same as the ‘pine-apple’ disease of Java. In 
addition, it is a parasite on growing canes. 
3. The ‘ rind 5 disease of the sugar-cane in the West Indies 
is identical with the ‘ red-smut ’ disease of Java, and is caused 
by the fungus Colletotrichum falcatum , Went. It can infect 
ripening canes at wounds and at old leaf-bases, and can over- 
come the tissues of young canes which are capable of growth 
and development. 
4. Melanconium infects canes easily at points where they 
have been invaded by Colletotrichum. 
5. The common root disease of the sugar-cane in Barbados 
is caused by the fungus Marasmius Sacchari , Wakker, the 
mycelium of which is able, under certain conditions, to over- 
come the growing-point tissues of the developing roots of 
the cane. 
Barbados, 
Aug . 30, 1902. 
Note added : — Thanks to the kindness of Professor Marshall 
Ward, I have been able to repeat the culture and inoculation 
experiments with Melanconium and Thielaviopsis , described in 
this paper, at Cambridge. Both these Fungi were grown 
in pure culture in a cane-extract food-material at a tempera- 
ture of 75 0 F., and the inoculation experiments were performed 
on mature sugar-canes growing in the Lily-house at the 
Botanical Gardens. No evidence of a genetic connexion 
between these two forms was obtained, neither did Melan- 
conium behave as a parasite towards the cane. On the other 
hand, the results were identical with those noted in the ex- 
periments in Barbados and described in the present paper. 
Mixed cultures of Melanconium and Thielaviopsis gave positive 
results when introduced into healthy canes. 
The Botanical Laboratory, Cambridge. 
Jan . 3, 1903. 
