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Calif. Breeding Alfalfa Adapted to Desert Valley Areas of 



Southwestern United States with Special Emphasis on Resis- 

 tance to Spotted Alfalfa Aphid (TherioaTi^is maculata) . 

 Develop a variety of alfalfa of superior yield and adapta- 

 tion to desert valleys of southwest by (l) breeding for 

 resistance to yellow clover aphid, (2; continuing and 

 expanding work on tolerance to Rhizoctonia crown and root 

 rot, (3) breeding for increased winter growth habit, (A.) 

 breeding for tolerance to alkali and high water table 

 conditions, (5) breeding for lodging resistance. 

 Forage Crops, Ent., PI. Path. I6A.6, Coop. ARS 



Colo . Winterhardiness and Disease Resistance in Alfalfa . To 

 inc rease (l) bacterial wilt resistance of Meeker Balti c 

 alfalfa while maintaining or increasing the present level 

 of resistance to other diseases auid the forage productivity; 

 and (2) seed setting ability of Hardistan alfalfa while 

 maintaining or increasing present level of forage productivity 

 and wilt resistance. 

 Agron. 7 



Colo. An Investigation and Study of Alfalfa Diseases , (l) Learn 

 organisms responsible for: seed and seedling blight, root rots 

 and vascular wilts of mature alfalfa, stem and foliage diseases. 

 (2) Test and evaluate: seed-treatment materials, soil-treatment 

 materials, spray and dust materials, and varieties for resistance 

 and susceptibility. 

 Hot. 178 



Ind. Alfalfa Improvement Through Selection and Breeding . To 



develop by breeding and selection high yielding, disease and 

 insect resistant varieties of alfalfa of high nutritional 

 quality well adapted to environmental conditions of Indiana. 

 For., PI. Path., Ent. 245, Coop. USDA 



Iowa Summer Blackstem of Alfalfa and Red Clover Caused by 



Cercospora Species . To (l) determine relative importance of 

 Cercospora species in blackstem disease complex; (2) study 

 life cycles, physiology and pathogenicity of the organisms 

 and determine effect of environmental factors on disease 

 development; (3) develop methods of producing epiphytotics in 

 greenhouse and field nurseries; and (4) evaluate for resistance, 

 or tolerance, breeding material and strains of alfalfa and red 

 clover developed by Iowa and other experiment stations in North 

 Central Region. 



Bot., PI. Path., Agron. 1265 (NC-37) Coop. ARS 



