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vary from 10-14 in diameter. The Fusarium spores are borne 
in clusters at the tips of short branches, and in the mass are tinged 
salmon-colour, but are colourless under the microscope, they are 
3-septate, tips pointed and slightly curved. In size they vary from 
40-50 x 5-6u. 
When a bulb becomes brown, it soon commences to decay, and its 
complete destruction is hastened by the attacks of various kinds of 
saprophytic fungi, Penicillium, &c., and by saprophytic eelworms, 
such as species of Rhabdites. When bulbs decay in this manner 
before lifting, as frequently happens, the soil becomes infected by 
the liberation of the chlamydospores, which infect future crops. 
e germinating chlamydospores emit one or two short slender 
branches, which bear a few short chains of minute, colourless, 
elliptical secondary-spores, measuring about 3 x 2u. hese 
minute spores are the first to infect Narcissus leaves in the spring, 
after which the disease is continued throughout the season by means 
of the Fusarium form of spore. 
The continuance of this disease may be due to two independent 
causes :— 
(1.) Slightly diseased bulbs, containing the Fusarium spores or 
I ospores. Such bulbs are not readily detected 
when the injury is slight; however, when cut in two 
the presence of disease is readily indicated by the brown- 
ing of the scales near the neck of the bulb. It is very 
doubtful whether soaking slightly diseased bulbs in a 
fungicide would kill the mycelium present ; it certainly 
would not kill thick-walled chlamydospores or resting- 
spores, 
(2.) Infected soil. Whenever a crop of diseased bulbs has 
occurred, it may be concluded with certainty that the 
soil is infected, due to the decay of bulbs before lifting, 
and to fallen diseased leaves, both of which contain 
chlamydospores in their tissues. So far as is known at 
present, the fungus has only been met with on Narcissus 
bulbs, but most probably in course of time, it wil 
extend its ravages to other bulbous plants. Under the 
circumstances, the safest course would be to avoid 
planting bulbs for two or three years, on land that had 
roduced a diseased crop. No kind of dressing would 
likely to destroy the chlamydospores directly, but 
