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Okla. Diseases of Corn and their Control . To (l) isolate 

 inbred lines or other sources of resistance to stalk rot 

 in corn by the process of testing in a cross with susceptible 

 testers to obtain only the dominant types of resistance; (2) 

 extend the testing of inbred lines to include studies on ear 

 rot, first devising satisfactory inoculation method; (3) 

 determine by isolation and inoculation, organisms most preva- 

 lent on corn roots; (U) isolate resistant inbred lines as a 

 result of greenhouse and field tests; (5) determine if any 

 ecological relationships exist among various organisms 

 causing root rot in corn; and (6) devise satisfactory method 

 of testing for corn smut resistance. 

 PI. Path., Agron. 607, Coop. ARS 



Pa. Disease Resistance in Corn. To (l) continue to produce 



disease-resistant inbred lines of value to Pennsylvania's 

 corn breeding program; (2) continue to develop and refine 

 techniques for screening resistant material from open 

 pollinated and hybrid populations; and (3) conduct fundamental 

 studies on nature of disease resistance, on factors influencing 

 it, and on its inheritance. 

 Bot., Agron. 911-B 



S. Dak. The Breeding of Superior Field Corn Hybrids , (l) Develop 

 corn hybrids better adapted for environmental conditions of 

 state; improve yield levels, and lodging resistance as it 

 pertains to root aind stalk weakness; work for better drought 

 resistant hybrids; incorporate disease resistance, especially 

 against root rot organisms; breed for insect resistance as 

 corn borer; incorporate male sterility in hybrids available to 

 public. (2) Develop new inbreds which, when used with each 

 other or existing inbreds from various stations, will accomplish 

 objectives in No. 1. (3) Study aspects of plant breeding for 

 improving hybrids as: methods of selection and mating systems, 

 aspects of heterosis, work on methods for developing drou^t- 

 resistant inbreds, and methods for development of inbred lines 

 through use of chemicals and radiation. (4) Cooperate with 

 experiment stations and USDA. 

 Agron., PI. Path. 66 



Va. 



m^ 



Varieties of Hybrid Corn . To (1) develop inbred lines and 

 hybrid varieties of com with resistance to leaf blight, stalk 

 rot, root rot, rust and smut; (2) culture organisms causing 

 diseases of corn and learn effects of environment on them; 

 (3) study genetics of pathogenicity and variations of causal 

 organisms and related phenomena; (4) develop methods for control 

 of com diseases and to promote use of known methods; and (5) 

 study inheritance of resistance to corn diseases. 

 PI. Path., PI. Physiol. 86058, Coop. ARS 



