24 THE DISEASES OF FRUITS. 



Remedies. It goes without further writing that the cedar 

 trees need to be removed from quince trees that are suffering 

 from the rust. As the quince twigs may become infested and 

 It is possible that the rust will live over winter, then it be- 

 comes essential that the diseased stems are destroyed. In 

 orchards where spraying has been carried out for other dis- 

 eases it is observed that the rust is less abundant, and it there- 

 fore seems probable that with the Bordeaux mixture the rust 

 may be held in check. 



The Black Rot (Sphtzropsis malorum Pk. ) is the same fungus 

 as previously mentioned with the same name under apples and 

 need not be considered further here. It is quite apt to begin 

 its destructive work at the blossom end of the fruit and fur- 

 nishes a good illustration of this place as being a favorite one 

 of attack. 



The Fire Blight {Bacillus amylovorus Burl) is frequently met 

 with upon the quince, and is demonstrated as being the same 

 in nature as that of the pear, under which head it has been 

 considered, with remedies. The disease as a rule is confined 

 to the upper parts of the twigs and rarely descends to the 

 larger stems. 



The Leaf Spot (Entomosporium maculatum Lev.) is another 

 quince enemy that is more frequently met upon the pear and 

 has been considered under the latter. It is interesting to note 

 in passing that plants when closely related are apt to have the 

 same diseases. 



The same thing will be observed under the next groups, 

 namely, the stone fruits, when a list of enemies is met with 

 quite different from those thus far considered. 



The Ripe Rot ( Glceosporium fructigenu m Berk.) is the Same 

 as that upon the apple, and requires the same precautionary 

 measures. It is not unusual for an old neglected quince bush 

 to be the source of infection for diseases of both the apple and 

 pear trees that are grown with good care near by. There are 

 various leaf blights of the quince which will need the Bor- 

 deaux mixture or cupram for holding them in check. 



THE STONE FRUITS. 



THE PEACH. Yellows. There is no disease that is more 

 disastrous than the Yellows, which in general is recognized 



