- 52 - 



NE-25 Biology and Control of Wilt Pathogens , (l) To make 



comparative physiological, morphological and life history 

 studies of certain wilt pathogens including those of oak wilt 

 and the Dutch elm disease; (2) to determine the methods of 

 transmission of certain wilt pathogens and to evaluate the 

 relative importance of each; (3) to determine the mechanisms 

 of symptom production by the various wilt pathogens; (U) to 

 devise more effective methods of control of wilt pathogens 

 with special reference to the use of chemicals including 

 antibiotics. 



Cooperating stations and agencies: Federal-grant projects - 

 Conn., Mass., N. J., N. Y. (Cornell), Pa., R. I., W. Va. 



OTHER REGIONAL RESEARCH PROJECTS REFERRED TO IN THIS SUMMARY 



BUT SUMMARIZED ELSEWHERE 



IR-1 Introduction. Preservation, Classification. Distribution, and 



Preliminary Evaluation of Wild and Cultivated Species of Solanum . 

 See ARS-23-8-22-b. 



IR-2 Obtaining and Preserving Virus-Free Deciduous Tree Fruit Stocks . 

 See ARS-23-8-22-b. 



NC-7 New Plants - The Introduction, Multiplication, Preservation and 

 Evaluation of New Plants for Industrial and Agricultural Use . 

 See ARS-23-8-12. 



NC-19 Reduction of Hazards in Use of Pesticides . See ARS-23-8-7-d . 



NE-9 Discovery and Preservation of Valuable Plant Germ Plasm . 

 See ARS-23-8-12. 



NE-15 The Effect of Pesticides on Quality of Fruits and Vegetables . 

 See ARS-23-8-7-d. 



NE-35 The Application of Climatology to Northeastern Agriculture . 

 See ARS-23-8-15. 



NE-36 Pesticide Residues in or on Raw Agricultural Commodities . 

 See ARS-23-8-7-d. 



S-9 The Introduction. Multiplication, and Evaluation of New Plants 

 for Industrial and Agricultural Use and the Preservation of 

 Valuable Germ Plasm. See ARS-23-8-12. 



S-22 Pesticide Residues - Determinations; Sampling; Effects on Plants 

 and Soils . See ARS-23-8-7-d . 



S-35 Effects of Soil Microorganisms on Soil Properties and Plant Growth . 

 See ARS-23-8-21-a. 



W-6 The Introduction,. Multiplication f Preser vation, and Determination 

 of Potential Value of New Plants for Industrial and Other Purposes . 

 See ARS-23-8-12. 



