DISEASES OF THE PEACH 269 



The fruit should be graded as to uniformity in color and 

 size for every package. The grower should endeavor to make 

 an honest as well as an attractive pack, and the fruit should 

 be of good quality throughout the package. 



Varieties. — ^There are many varieties of peaches, and these 

 are usually based on regional differences. The adaptability 

 of varieties to different regions calls for some consideration, 

 but it is usually a factor that is less pronounced than it is 

 with many other fruits. The following varieties are among 

 the most important and the most widely planted: Elberta, 

 Carman, Early Crawford, Late Crawford, Salway, Lemon 

 Cling, Champion, Mountain Rose and Old Mixon Free. 

 There are many other varieties listed and suited to various 

 regions of the country, but they are not so widely distributed. 



DISEASES OF THE PEACH. 



The peach is subject to the attack of several diseases and 

 insects. This plant has more specific diseases and insects 

 which are characteristic only of very closely related plants 

 than most any other fruit. Many of these troubles are 

 confined particularly to the peach. 



Peach Yellows. — The peach yellows is perhaps the most 

 serious disease that attacks the peach. It is also found on the 

 almond, the apricot and the nectarine. 



There can be no specific cause assigned to the yellows, but 

 the symptoms of the disease are easily recognized by the 

 premature ripening of the fruit, which is highly colored, and 

 the spotted and premature unfolding of the winter buds. The 

 opening of the leaf buds occur as early as July and as late 

 as November. This symptom is very common on diseased 

 trees during August, September and October. The fruit will 

 ripen from one to six weeks in advanc.e of its normal season 

 and will be deficient in quality. 



The yellows is a contagious disease and it spreads from 

 one tree to another. The disease is supposed to be of bacterial 

 origin, but this point is still a disputed question. 



The peach yellows must be controlled by preventive 

 measures. Spray materials are not effective in holding this 



