458 QUEENSLAND AGRICULTURAL JOURNAL. [1 Drc., 1898. 
Jf the above regulations are stricctly adhered to, I am of opinion that the 
value of the St. Helena herd will be very materially enhanced; and, further, 
I have no hesitation in stating that within a very short period all the cattle 
could be, practically speaking, guaranteed free from tuberculosis. p 
I sincerely trust that this experiment may prove of value and be an object 
lesson to the dairy farmers throughout the colony, precisely in the same manner 
that similar inyestigations after publication have been successful in other 
countries, notably Denmark, France, and throughout the United States. 
Vegetable Pathology. 
FRUITLET CORH-ROT OF PINBAPPUE. 
By HENRY TRYON, Entomologist. 
(Prares LXVIIL—LXX1.) 
Tuts affection of the pineapple is by no means of uncommon occurrence, at 
least in Southern Queensland, and occasions sometimes considerable loss to 
the grower of that fruit, especially during the winter months of the year, 
when pineapples are as a rule in small supply, and accordingly command 
high prices. Moreover, fruit exhibiting it has already found its way to southern 
markets, where its presence has formed a topic of remark in both official and 
other quarters. 
SYMPTOMS. 
As may be inferred from the title bestowed by the writer on the disease, 
it is the fully-grown fruit-that more especially manifests its presence, though 
this may happen before the latter is as yet ripe. 
Prickiy QuEEN.—In the case of the so-called Prickly Queen, the variety 
both more exclusively cultivated and at the same time especially subject: to its 
attack, its occurrence is characterised by the following general features :— 
Eaxternal.—The fruit as judged by external appearances ripens unevenly, 
Although its symmetry be preserved, particular sezments or groups of segments 
occur here and there, that remain pale-green; whilst the entire surface, with 
these exceptions, has assumed a general hue characteristic of ripening or indeed 
ripe fruit. 
Internal—On cutting the fruit across (vide Plate LXVIILI., A) will be 
observed in greater or less number well-defined dark-brown elongate markings 
or areas of decayed tissue, that extend to a variable length from a short distance 
from the outside towards the centre. These differ greatly in shape, as well as 
both in length and breadth; but owing to their colour and dimensions are 
always very conspicuous. It is found also that they occur immediately opposite 
the pale-green surface markings already alluded to; but that they may exist in 
a partially developed condition without any such external indication of their 
presence. The central axis does not manifest any abnotinal change. 
On separating the compound fruit into its component fruitlets, it will be 
found that the affection is almost invariably limited, in the case of each patch 
of discoloured tissue, to individual examples, in connéction with which it occurs 
isolatedly, although in some instances where very pronounced it may have 
apparently extended from one fruitlet to its immediately’ adjacent neighbour. 
Should the section pass lengthwise through the centre of these fruitlets, 
or if, as is preferable, individual diseased ones are’ dissected out and 
similarly cut through, the undermentioned appearances are revealed, premising 
that a healthy fruitlet should present the following structural features 
(vide Plate LXX., Fig. A 1):—An upper oval cavity or chamber (a), completely 
