218 THE CHIEF SOUTHERN AGRICULTURAL CROPS 



sawdust that exudes from the mouth of their 

 burrows. 



The peach yellows that has killed so many orchards 

 at the North is almost unknown at the South, but a 

 somewhat similar disease, known as rosette, has been 

 quite destructive in restricted localities. Infected 

 trees can be told at quite a distance by the yel- 

 lowish color and the manner in which the leaves 

 are crowded at the ends of the twigs. This, like the 

 yellows, is a functional, non-parasitic disease. No 

 remedy is known. Diseased trees should be promptly 

 dug up and destroyed. 



Plums (^Prunus sps.^. — The remarks already given 

 in regard to peaches will nearly all apply with equal 

 force to plums, since the two crops require very 

 similar conditions and management and are liable 

 to the attacks of the same diseases and insects. 

 If anything, plums may be planted on rather heavier 

 soils than peaches. The cultivated varieties of plums 

 differ much more widely than peaches, since they are 

 derived from a number of distinct species. The 

 Japanese plums, which are supposed to belong to 

 Primus triflora^ are the most important race for the 

 Southern states and include such well-known market 

 kinds as Abundance, Burbank, and Kelsey. Next in 

 importance come the Wild Goose class (^Prunus Jior- 

 tulana^. Following these are the native Chickasaws 

 (^Prunus angustifolid)^ many of which have been 

 brought into cultivation. The European plums and 

 prunes (^Prunus c?o?7^es^^ca), which are so largely grown 

 in California, do not succeed well at the South, and 

 are rarely found there. The many native varieties 



