1696 



ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 



Imports of Plums and Pmnes — ^Year 

 Ending June 30, 1910 





Pounds 



Dollars 



Europe: 



Austria-Hungary 



Belgium 



France 



Germany 



Greece 



Italy 



Netherlands 



Spain 



Switjserland . 



71,061 



1,750 



149.714 



62,112 



90 



1,068 



12 



1,592 



4,520 



408 



17,375 



18,690 



5 



96 



3 



73 



United Kingdom: 



England . 







Scotland . .... 







Ireland , ... 







North America: 



Canada 



Mexico 



85 



7 



West Indias—Cuba 



Asia: 



Hongkong 



Japan . . .... 



1,965 

 6.726 



58 

 461 









Total 



296,123 



41,696 



RECAPITULATION 

 Europe 



North America 



287,399 

 2,050 

 6,674 



41,170 

 65 



Asia 



461 







Plums in Alaska. See Alaska. 



PLUM DISEASES 



Bladders. See Poekets, this section. 

 Brown Rot. See Cherry Diseases, 

 Cankers. See Apple Diseases. 

 Crown Gall. See Apple Diseases. 

 Fire Blight. See Pear Diseases. 

 GuMMOsis. See Cherry Diseases. 

 Leaf Curl. See Peach Leaf Curl under 

 Peach Diseases. 

 Mildew. See Cherry Diseases. 



Pockets or Bladders 



Exoascus sp. 



American varieties of plum are some- 

 times attacked by a fungus related to the 

 leaf-curl fungus. This causes enlarge- 

 ment of the young fruits which are hol- 

 low; because of this condition they are 

 sometimes alluded to as ''bladders." The 

 conditions which bring about the disease 

 are the same as those of leaf curl, viz., 

 excessive cool wet weather in the early 

 season. The winter spray as for leaf 

 curl should be effective. 



For Remedy, see Leaf Curl, under 

 Peach Diseases. 



A. D. Selby, 

 Wooster, Ohio. 



Root Rot. See Apple Diseases. 



Rust. See Peach Diseases. 



Shot-Hole Fungus. See Cherry Dis- 

 eases. 



Spot. See Apple Diseases. 



Sun Scald. See Wi^iter Injury under 

 Apple Diseases. 



Twig Blight. See Apple Diseases. 



Winter Injury. See Apple Diseases. 



PLUM PESTS 



American Silk Worm 



Not likely to become important where 

 spraying is done for other pests. 



Aphids. See Aphids. 



Bark Beetle. See Shot-Eole Borer, 

 under Cherry Pests. 



Brown Day Moth. See Prune Pests. 



Bud Moth. See Eye-spotted Bud Moth, 

 under Apple Pests. 



Buffalo Tree Hopper. See Apple Pests. 



Crickets. See Baspderry Pests. 



Ciircnlio 



Conotrachelus nenuphar Hbst. 

 H. F. Wilson 



This insect is one of our few serious 

 pests found native to America, and was 

 one of the first to be written about and 

 recommendations made for control. 



So far as known it does not occur west 

 of the Cascade mountains, and it is to be 

 hoped that this barrier will continue to 

 be as effective in the future as it has 

 been in the past. The original food 

 plants seem to be plums and wild crab- 

 apples. At the present time, in addition 

 to these fruits, cultivated peaches, plums, 

 cherries, apricots, apples, pears, etc., are 

 attacked. 



The main injury to the fruit is caused 

 by the egg and feeding punctures made 

 by the adults and the work of the larvae 

 in the fruit 



Life History 



The insect hibernates through the win- 

 ter as an adult under boards and trash 

 on the ground and comes out in the 

 spring about the time the buds are swell- 

 ing and begins feeding and depositing 

 eggs in the fruit as soon as it is well set. 

 Egg-laying may continue for several 

 weeks and the eggs hatch in from three 

 to six days, depending upon the tempera- 



