-33- 



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 prevention 

 of diseases of cotton seedlings, & determine other character- 

 istics of these chemicals which would be of benefit to seeds- 

 man & farmer; (2) study post-emergence diseases of cotton & 

 attempt to develop effective control measures; & (3) study 

 seed-borne diseases of cotton & attempt to determine feasibi- 

 lity of disinfesting cotton seeds of seed-borne pathogens. 

 PI, Path. HL-5 Coop. ARS 



Miss. Investigation of the Diseases of Cotton and Their Control 



Under Mississippi Conditions . To (1) develop greenhouse & 

 field techniques to determine resistance & susceptibility to 

 certain cotton diseases; (2) investigate seed stocks & sources 

 now available, & those becoming available, for resistance to 

 major cotton diseases; (3) study genetics of resistance; & (4) 

 design & conduct work on other forms of disease control. 

 PI. Path. HL-6 



Mo. Insects of Cotton in the Cotton Growing Section of Missouri . 



To become familiar with the biology and habits of major insect 

 pests of cotton in the cotton section of Missouri; to evaluate 

 their importance; determine the insect pest population levels 

 which justify use of control measures; and work out effective 

 controls. 



Ent. 2U 



Mo. The Diseases of Cotton of Missouri , (l) Learn diseases 



of economic importance & describe those found to be new. (2) 

 Make crop yield loss estimates due to diseases. (3) Learn re- 

 sistance rating of present breeding lines & varieties to the 

 common diseases of cotton, cooperate with plant breeder in 

 development of new, more resistant varieties. (4) Learn 

 optimum & limiting environmental factors for disease develop- 

 ment. (5) Test established & newly developed chemicals & 

 antibiotics for control of diseases. (6) Study available 

 methods of inoculation for inciting epiphytotics & develop 

 new techniques for the study of the diseases of cotton. 

 Field Crops 322 



N. Mex. The Occurrence of Beneficial Insects as Related to Insec- 

 ticidal Control Programs for Hemipterous Insect Pests of Cotton . 

 To determine (1) occurrence & abundance of beneficial insects 

 in cotton fields; (2) relative importance of species found; 

 (3) effect of chlorinated hydrocarbon type insecticides on 

 beneficial insects when applied as control of harmful hemi- 

 pterous species. 



Biol., Ent. 54 



