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N. Y. Virus and Vims -Like Diseases of Tree Fruits. k» Pro- 

 (Cornell) duction and Maintenance of Virus -Free Nursery Foundation 

 Stock of Commercial Fruit Varieties ^ To (1) produce and 

 maintain virus -free clones of varioris species and varieties 

 of fruit trees, and establish hecLLthy seed so\irce trees for 

 rootstock production; and, (2) Improve present methods of 

 indexing for determination of freedom from viruses. 



Plant Path., Pomol. Q'J-k (HE-1^, See Part 17, Section c) 



N, Y. Nematodes Parasitic on Roots of Fruit Trees. To (l) 

 (Cornell) assess the damage to fruit trees by plant pathogenic nematodes; 

 (2) devise control methods for diseases caused by nematodes; 

 and, (3) clarify life histories of plant parasitic nematodes, 

 learn Influence of environmental factors on their development 

 and pathogenicity, clarify relationships between nematodes and 

 other organisms in causing diseases of roots of fruit trees. 

 Plant Path. l88 (NE-3^. See Part 17, Section a) 



N. Y. The Control of Nematodes on Horticultiaral Crops . To (l) 

 Identify species of nematodes sissociated with root injury or 

 declined vigor in commercial fruit plantings; (2) show if 

 species are pathogenic to host; and, (3) develop control for 

 crops where a nematode problem is ascertained as a result of 

 this project. 



Plant Path., Hort. 8 (NE-3i^. See Part 17, Section a) 



Ohio The Control of Fruit Diseases. 2. The Control of Fungus 



Diseases of Stone and Small Fruit Plants^ To (1) laarn effect- 

 iveness, safety and economic value of new fungicides for con- 

 trol of fungus disease of stone and small fruits; emd, (2) 

 develop more effective and cheaper fungicide spray schedxiles 

 for peaches, plums, and cherries. 

 Bot. 15-2 



Oreg, Virus and Similar Diseases of Orchard Trees . To determine 

 identity emd distribution of virus and vlr\is-like diseases of 

 orchfiLTd trees . 



Plant Path., Ent. Ml- 



Wash . Fruit Spot and Related Physiological Disorders of Fruits . 

 To study fruit spot and related physiologiceLL disorders of 

 fruits to determine cause emd get data on value in the control 

 of such disorders. 

 Hort. k26 



