336 



TWENTY-FIKST REPORT. 



The extent of loss by covered .smut of barley, a disease readily prevented 

 by formaldehyde treatment, should be noted. Similarly, the high percentage 

 of barley stripe speaks significantly of seed contamination. 



During the early part of July, Dr. Woodcock visited more than fifty 

 fields in several Michigan counties and recorded carefully the percentages of 

 "stripe" found. His results are given here as indicative of the general run of 

 fields found in the state : 



TABLE No. 4* 

 Prevalence of Barley Stripe 



*In the tables given in connection with the various diseases, the word "Trace" refers 

 to the condition where the disea.se wa-s present in amoimts less than 1 %. 



