6 
Mr. W. S. Williams, one of the most successful lemon- 
growers in the Doncaster district, propounded the question— 
“ Can Australasia supply its own requirements in citrus 
fruits ?” at the conference of Australasian fruit-growers held 
in New Zealand in 1896, and his answer was — 44 In my opinion, 
yes, and a great deal more ; as, if the system of gathering and 
storing was adopted, there would be a constant supply and no 
glut. The fruit that is wasted in winter when there is no 
demand for it could be kept to meet the demand commencing 
in November and continuing on into May. Prices would be 
better regulated, and our Mediterranean friends would have 
to find fresh markets. It is only a question of a very short 
time, as there is any amount of suitable land for lemon- 
growing in Victoria, and more in New South Wales, and 
then Queensland, the Australian home of the citrus family. 
Then there is South and Western Australia and New Zea¬ 
land. Altogether we could supply the half of Europe and 
have plenty left for ourselves.” With such a prospect and 
the certainty of a much larger area being cultivated, there 
arises the necessity for spreading information, not only as to 
the best methods of culture, but how to guard against the 
various pests which infest every part of such trees from the 
roots to the fruits. Until a more general work is issued 
dealing with the various fungus diseases of cultivated plants, 
it seems to me desirable to select some of the more import¬ 
ant economic plants aud show to those already engaged in 
their culture, as well as those about to enter upon it, the 
fungus enemies with which they have to contend and the 
best known means of combating them. 
I have already dealt with the grape vine,* and described 
in more or less detail the 23 species of fungi added to the 
fourteen previously met with in Australia, and shown how 
they may be kept in check. Then “The Fungi on the 
Wheat Plant in Australia ”f have also been recorded, there 
being seventeen species already known on Australian wheats. 
And now the fungi which infest citrus trees are here treated. 
It will be observed that I have not confined myself to Vic¬ 
torian forms, but have included Australian, because there is 
such constant communication between the different colonies 
that the presence of disease in one cannot be ignored by the 
others ; but this is a very different matter from recording 
* Additions to the Fungi on the Vine in Australia (with 80 Figures), 54 pp., 1808, 
Government Printer, Melbourne. 
f Agricultural Gazette, New South Wales, September, 1893. 
