65 
The questions and answers are here given :— 
1. At what age have you found trees attacked ?—I have seen 
trees two years from the nursery affected and die from the 
“ Collar Rot.” 
K • 2. Is the lemon more liable to the disease than the orange ?— 
From my experience in what I have seen the lemon stock is most 
decidedly more subject to the disease. 
3. Do affected trees bear an abnormal amount of fruit the first 
season ?—Yes, they do, and that is a pretty sure sign of the 
disease if the tree is about five or six years old. 
4. Do you approve of the lemon stock for oranges ?—I, myself, 
would rather have lemon on lemon and orange on orange stocks. 
It depends on the climate and soil. 
5. What is your opinion of the bitter orange stock as a preven¬ 
tive against “ Collar Rot”?—I don’t think it is as good as the 
sweet orange. 
6. Have you had sufficient experience of layering to say if it 
will have any effect on “ Collar Rot”?—I have never seen a sign 
of “ Collar Rot ” on layers, but they might get it in favorable 
places. 
7. Some say that they do not like layering as well as working 
on seedlings, what is your opinion ?—I intend in future to plant 
only layers. 
8. Is there any other information you wish to give?—The 
main point is to have good drainage, and don’t plant the trees too 
deep, and keep plenty of moisture around them in summer time. 
As regards layering opinions are much divided, and it has been 
stated that layering has been abandoned in New South Wales 
owing to such trees being subject to collar-rot. 
References. 
Since the discovery of the disease in 1832 numerous observa¬ 
tions have been made upon it, and in the literature of this disease 
alone, givon in Dr. Peuzig’s work already referred to, no less than 
54 publications are mentioned. Even in Australian publications 
there are numerous references to it. 
Acres (E. H.), Victoria—Royal Commission Vegetable Pro¬ 
ducts—Sixth Progress Report, p. 24 (1888). 
Agricultural Gazette , N.S.W.—“ Mai di Goma,” “ Root-rot,” 
“ Gum Disease.”—Vol. in., Pt. 8, p. 636 (1892) ; “ Collar 
Rot.”—Vol. vni., Pt, 6, p. 439 (18J7). 
Cobb (N. A.)—“ Letters on the Diseases of Plants,” Agricul¬ 
tural Gazette , N.S.W.—Vol. vm., Pt. 4, p. 228 (1897). 
Corrie (L. G-.)— u Cultivation of Citrus Fruits, with notes on 
the varieties introduced.”—Proceedings Conference Australasian 
Fruit-growers, N.Z., p. 67, May (1896). 
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