19 
Experiments for the treatment of this disease were carried out 
by Mr. G. B. Owen, of Castle Hill, New South Wales, in 1896-7. 
The bed experimented on was eight trees long, and four wide. 
The trees wero fairly large, some 30 years old, and most of them 
were badly affected, some of them especially so. The whole bed 
, was treated to a dressing of coarse bone-manure, at the rate of 
about 6 cwt. per acre, and of sulphate of iron 1 lb. to each 
tree. 
The first spraying with Bordeaux mixture was given on 29tli 
October, as soon as the crop was off, and subsequent sprayings on 
28th November, 13th January, 11th February, 9th March, and 
4th May, or six sprayings in all. 
The results, in Mr. Owen's own words, are—“As far as I have 
been able to find out, there arc only two oranges affected with 
the disease on the whole bed, whereas last year it was hardly 
possible to find a clean fruit, and the trees, in spite of the 
droughty season, look bettor than they have done for years. 
3 lbs. sulphate of copper to 40 gallons of water is recommended, 
as it is perfectly harmless to cithor young fruit or wood, and after 
the first years spraying it is pointed out that one or two spray¬ 
ings a year may keep the trees clean in future—first, soon after 
fruit is set; next, when half grown." 
Since the 1’lorida disease has been controlled by spraying, it is 
highly probable that some fungus is concerned, and it may be, as 
suggested by Webber, that tiio fungus mainly exists in the 
vegetative stage there, as is often the case with scab-producing 
fungi. 
References. 
Cobb (N. A.)—Letters on the Diseases of Plants. Aq. Gaz., 
N.S.W., Yol. VIII,, Pt. 4, p. 225 (1897). 
Owen (G. B.)—“Melauose.” Ag. Gaz., N.S.W., Vol. VIII 
Pt. 9, p. 610 (1897). 
Swingle (W. T.) and Webber (H. J.)—“The Principal Dis¬ 
eases of Citrous fruits in I lorida." Washington. Government 
Printing Office (1896). 
B 2 
