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to it, and although it may thrive for a time by virtue of the actual 

 vitality it possesses, it "will in the long run be sure to succumb from 

 the attacks of insect or vegetable parasites, which are invited by 

 the weakness engendered by the unsuitable conditions with which 

 it is surrounded. 



Again, if you are forced to plant a tree on ground which is dry, 

 when you know that it requires moisture, you at once invite the 

 attack of any enemy which may be in the immediate surroundings. 



If you plant on inland " vegas," trees which are native to the sea 

 shore, you at once use the most certain means to induce a weak or 

 unhealthy condition, and invite the attack of parasitic enemies. 



If however your plants are known to be getting all they require 

 in the way of plant food, and all they require in the matter of suitable 

 temperature and moisture ; if they are sitviated in a place where the 

 surrounding conditions are favourable for their growth and are then 

 attacked by parasites, in the majority of cases the parasitic enemy is 

 out-done and overcome by the vitality of the trees and does not gain 

 ground. If however there are unhealthy plants in the neighbourhood 

 which allows of a rapid increase of the parasite the truly healthy may 

 also become aflPected and be ultimately destroyed by force of numbers. 



Some however make no distinction between such cases, and seek 

 no other remedy than the destruction of the insect or vegetable 

 parasite, and consequently fail to do any good work, for it would 

 appear to be plain reasoning that it is really little use destroying the 

 insect or organism, if the condition of the soil, the aspect, or the 

 climate, are really unsuited to the growth of the plant, or if it 

 urgently requires certain manurial constituants which are not present. 



We hear of the Coffee leaf " disease," the Vine " disease," the 

 Potato " disease," &c., &c. Now it is fairly certain that these 

 "diseases" have always been present, and that their spread is entirely 

 owing to the destruction of the balance of nature by the hand of man 

 who throws together for his own ends, large areas under a single 

 crop, and thus provides food for the ready spread of any destructive 

 oro-anism, and what was once but an organism of the forest, feeding 

 here and there upon the weak and helpless, becomes at length a 

 destructive agent, which is only after all — however it affects the 

 planter — Nature trying to restore the original balance. 



K we look at the history of all such outbreaks or spread of 

 destructive organisms, we shall seldom find that what is commonly 

 termed " a cure" has been found. 



