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La. A Study of (ienetic Factors Involved in Yield Potential. 



Fiber Quality and Disease Resistance in CottonT Study: (l) 

 nature of inheritance of and interrelation among quantitative 

 characters concerned with yield and fiber properties in crosses 

 within upland cotton and in crosses between G. hirsutum (upland) 

 and G. barbadense (Sea Island); (2) nature of inheritance of 

 resistance to rootknot nematodes, (3) Evaluate effect of 

 recurrent selection on frequency of desirable genes in crosses 

 between varieties of upland cotton and interspecific hybrids of 

 upland X Sea Island. 

 Agron. 557 (S-l) 



La. Control of Sore-Shin. The Important Seedlinp Disease of 



Cotton in Louisiana . (l) Study various fungicides for sore- 

 Bhin control under laboratory and greenhouse conditions. 



(2) Make studies involving application, with special equip- 

 ment of screened fungicides and effect of these fungicides in 

 field. (3) Work out an inexpensive, practical method of sore- 

 shin control. 



PI. Path. 931, Coop. ARS 



La. Breeding Cotton for Resistance to Ma.ior Diseases and 



Insects , (l) Develop new varieties having combined resistauic e 

 to rootknot nematodes and Fusariiom wilt. (2) Evaluate 

 commercial varieties of cotton recently released by Agricultural 

 Experiment Stations and private companies for resistance to 

 major cotton diseases found in State. (3) Screen genetically 

 divergent types of cotton for resistance to boll weevil, boll- 

 worm, aphids, spider mites, Fusarium wilt, rootknot nematodes, 

 seedling disease due to Rhlzoctonia and boll rot to be used in 

 breeding new varieties with resistance to these pests and 

 diseases. 



Agron. 949, Coop. ARS 



Miss. Investigation of the Seedling Diseases of Cotton and 



Their Control Under Mississippi Conditions . To (1) evaluate 

 value of various chemical seed treatment materials for pre- 

 vention of diseases of cotton seedlings and determine other 

 characteristics of these chemicals i^ich would be of benefit 

 to seedsman and farmer; (2) study post-emergence diseases of 

 cotton and attempt to develop effective control measures; and 



(3) study seed-borne diseases of cotton aind attempt to determine 

 feasibility of disinfesting cotton seeds of seed-borne pathogens. 



PI. Path. HL-5, Coop. USDA 



