290 
or eee The Fusariwm conidia, if they were formed, 
appeared fairly late, and were three- to five-septate.. They were 
abjuncted before they were fully mature. Measurements have been 
ao 
Fig. 13. Characteristic bundles of macroconidia from a cashew nut 
twig culture, 6 days. e the right is a younger sated of the same from 
an acid potato culture, 0. 
given. The three ae were, as a rule, more straight, shorter, 
broader in proportion, and more numerous than the five-septate 
‘spores. The larger multi-septate conidia have already been 
referred to. They were found only seldom, and they evidently 
did not occur in Butler’s fungus. Such out-sized conidia are 
known to occur at times in species of Fusarium both in nature and 
in culture. Macroconidial production was noted only on single 
conidiophores. Conidial germination, as already described, cor- 
* responded with that of Butler’s fungus, but there did not seem to 
be any difference in the chlamydospores or in the methods of their 
formation in culture. The morphological and cultural differences 
do not seem to justify the separation of the Uganda Fusarium 
from F. udum, and there is no doubt in the writer’s mind that a 
careful comparison of Dr. Butler’s details with the notes in this 
paper on the earlier cultures and the later special cultures will 
admit of the provisional reference of the Uganda Fusarium to 
Fusarium udum., 
The second part of the special work undertaken to establish 
the exact identity of the Fusarium consisted of infection experi- 
ments with the Indian host of FY’. udum. Numerous seeds 0 
pigeon-pea were sown in soil from which had been derived wilted 
cashew nut seedlings and which was presumably infected with the 
Fusarium, and in the laboratory tins of similar soil were inoculated 
with the Fusarium and afterwards sown with pigeon-pea. The 
laboratory experiments gave entirely negative results although 
they were repeated several times, but the plants grown in infec 
soil in the open contracted a wilt and died. The working of the 
fungus was slow, for the time which elapsed between the sowing 
of the seed and the deaths of the plants was eight to nine months. 
The percentage of deaths at the time of writing was fifty, but 
there were indications that more of the plants were in process of 
wilting. The symptoms of the disease of pigeon-pea were 
similar to those described from India, and the Fusarium was 
recovered from all the diseased plants and grown in culture. It 
