CITRUS TREES AND THEIR DISEASES 23 



dies and a certain percentage of these trees show re- 

 covery, while others show no sign of recovery by the 

 same treatment. Therefore, it is an indisputable fact 

 that some trees can stand and throw off disease better 

 than some others, some trees like men being more 

 strongly constituted than others, and the weaker re- 

 quire more careful nourishing and perhaps longer 

 treatment. 



I desire to instill into the readers the one promin- 

 ent fact that all men are not constituted alike, neither 

 are all trees constituted alike of the same varieties, 

 neither are all animals constituted alike of the same 

 family ; therefore, it is necessary that we have patience 

 to care for, nourish and treat the weaker ones of these 

 families more carefully than we would have to do with 

 the more rugged, even though they suffer from the 

 same cause and the same disease. For illustration; 

 the writer has taken trees that have been pronounced 

 incurable, yet, at the same time they have responded 

 to treatment and have quickly recovered, while others 

 which were only considered in a bad condition have 

 taken very much more time, pains and care to produce 

 the same results as mentioned in the former. 



There can be many causes for citrus tree diseases ; 

 the writer will not attempt to mention all causes and 

 conditions, but a few of the most important. In the 

 first place, as stated in this book, it has often been the 

 case that the infant tree has contracted its disease in 

 the nursery row and not even recognized by the nur- 

 seryman or the planter, but as the years roll around 

 the effects become more noticeable. 



