78 



PROTECTION OF PLANTS — 1923-24 



GERMINATION WAS SOMEWHAT REDUCED BY THE TREATMENTS EXCEPT IN THE 

 CASE OF CuS04 LIME DUST IN THE FIELD. 



Times of heading and ripening varied with the treatments. The CuCOa 

 and CUSO4 lime dust plots headed on July 23rd while all the others headed 

 on July 25th. The untreated plots ripened on August 23rd, the CuCOs and 

 CUSO4 — hme dust plots on August 24th and the others on August 25th. 



The percentage of smut by head count varied in the middle rows of the 

 plots from the average except in the case of CuCOs dust, as shown in the next 

 table. 



SMUT COUNT BY HEADS. 



