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Oreg, Maintenance of a Repository for Germ Plasm of Pears and the 



Evaluation of a New Germ Plasm . To receive potentially valuable 

 plant materials of pear species, etc., from primary sources or 

 regional introduction stations for propagation, maintenance and 

 evaluation of germ plasm; (2) make available to fruit breeders 

 or other scientific personnel, propagations by buds, scions, or 

 grafter trees; (3) initiate program of evaluating, multiplying, 

 and distributing introduced types, varieties and strains of pears. 

 Hort. 46-A (W-6) Coop. Regional Plant Introduction Station 



Tenn. Breeding for Fire Blight Resistance . To develop varieties 



of pears, apples, and quinces combining resistance to fire blight 

 and resistance to other diseases with commercial quality. 

 Hort. 117 



Va. Breeding New Varieties of Apples Especially Adapted to 



Conditions in Virginia ^ (1) Develop new varieties of apples 

 well adapted for commercial production; study types late in 

 season of blooming, resistant to disease and insects j (2) 

 conduct fundamental work including studies of pollination values 

 and cytological relations of Virginia apple varieties and produc- 

 tion of polyploid types of apples. 

 Hort*. 86003 



W. Va. Apple Measles . To secure a better knowledge of the nature 



and cause of the diseases of apple bark comnonly known as "measles" 

 with the view of eventually working out methods of control. 

 PI. Path., Hort. 8 



W. Va. Black Root Rot of Apple . To develop adequate measures of 

 control. 



PI. Path. 9 



W. Va. The Effect of Chemical Spray Schedules on the Quality and 



Quantity of Apples Produced . To determine (1) effect of various 

 insecticides and fungicides and time of application on the quantity 

 and quality of fruit produced; and (2) relative cumulative as well 

 as current season's effect of various spray schedules on fruit set, 

 yield, color, and finish. 

 Ent., PI. Path. 83 



W, Va. Virus Diseases of Pome Fruits in Addition to Those of Stone 

 FruitsT (1) Learn extent and importance of virus diseases in 

 apple varieties grown in State; (2) find suitable indexing hosts 

 for visuses; (3) learn rates and methods of natural spread of 

 viruses and devise means of preventing spread and reducing injury. 

 Hort., PI. Path. 89 Supplement 



