6 Department Circular 329, U. S. Dept. of Agriculture 



EXTENSION CONFERENCES 



An important conference of extension plant pathologists was held 

 on December 31, 1923, at Cincinnati, on the occasion of the annual 

 meeting of the American Phytopathological Society. This session 

 was attended by 31 pathologists representing 15 States and the 

 United States Department of Agriculture. The discussion by these 

 specialists of results obtained and methods of conducting the work 

 resulted in strengthening materially their State extension plans of 

 work for the year following. This was the second annual conference 

 of this type and proved to be so profitable that plans have been made 

 to continue the practice. 



Fig. 



ip showing in black the IS States that maintained extension projects in 

 plant pathology during 1'923. 



OUTSTANDING ACTIVITIES 



NATIONAL PROGRAM OF WORK 



Demands for assistance by farmers led, in 1923, to the formulation 

 of projects designed to reduce losses caused by more than TO diseases 

 affecting at least 30 crops 2 . 



Active work was as a rule preceded by plant-disease survey activity 

 conducted in cooperation with the Plant-Disease Survey, United 

 States Department of Agriculture. Depending on the nature of the 

 disease these projects brought up extension problems arising from 

 efforts to introduce or make more general such control measures as: 



(1) Planting of immune or disease-resistant varieties. 



(2) Crop rotation. 



(3) Seed disinfection. 



(4) Seed-bed sterilization. 



(5) Field treatment of soil. 



(6) Spraying and dusting. 



See table on page 20. 



