12 THE REPORT OF THE No. 36 



In February, 1922, the European Corn Borer* quarantine was amended. 

 By this amendment a double quarantine was established which prevented the 

 movement of corn on the cob, corn stalks, etc., from the heavily infested areas 

 (Elgin and Middlesex counties), to the lighter infested districts. This was done 

 in order to prevent shipments, heavily infested with European Corn Borer 

 larvae, being forwarded to newly or very lightly infested areas, and thus to start 

 up new and possibly heavy infestations on the border of the quarantined area. 

 The advisability of taking this step can best be illustrated by the results obtained 

 from the making of field counts to determine the degree of infestation in different 

 districts. Port Stanley was taken as the centre for this work, three circles were 

 drawn with a radius of approximately eight, sixteen and thirty miles. Fields 

 of corn were examined at frequent intervals on these circles. The degree of 

 infestation in the inner circle showed a variation of from ten to one hundred 

 per cent., whereas the variation in the middle circle was from seven to seventy- 

 seven per cent., and in the outer circle from one to seven per cent. The per- 

 centages were secured by counting the number of stalks infested in lots of one 

 hundred stalks, three counts were made in each field and the results averaged. 



During the summer quarantine on the movement of corn and corn products 

 was maintained in various ways. Warning notices were placed at all road inter- 

 sections leading out of the quarantined area. Large banners were placed on 

 the main automobile highways, warning motorists not to take corn from the 

 infested area. Inspectors were stationed at Toronto, Hamilton, Sarnia and 

 Windsor to watch for evasions, in the case of shipments of sweet corn on trains, 

 boats, via express and freight, etc. At Hamilton 15,000 dozen and at Toronto 

 47,000 dozen ears of corn were examined and traced. When it is realized that 

 sweet corn from southern Ontario goes as far east as Cape Breton, N.S., and as 

 far west as the Soo and Port Arthur, the necessity of keeping a close watch on 

 all shipments of corn to prevent the spread of the European Corn Borer can 

 readily be understood. In addition, a close watch was kept on Fall Fairs, as 

 it has been customary in the past to send green corn for fodder with exhibits of 

 live stock. The general public is co-operating with the Department of Agriculture 

 in a very gratifying manner. During the entire season it was only necessary 

 to prosecute six individuals for evading the quarantine by shipping corn on 

 the cob from the quarantined area. 



In July, 1921, the United States Department of Agriculture placed a quaran- 

 tines on the province of Ontario, which prohibited the importation into the 

 United States of certain cut flowers and vegetables unless the same were 

 accompanied by a certificate of inspection, stating that the shipment was free 

 from infestation by the European Corn Borer. Between February 15th and 

 November 11th, 1922, nine hundred and sixty-five certificates were issued. The 

 articles inspected and covered by these certificates included the following: 



Oats and Rye Straw 440 tons. 



Cut Flowers 2,059 dozen. 



Beets with tops 26,850 dozen bunches. 



Rhubarb 200 dozen bunches. 



Beans (green) 3,060 bushels. 



Celery 290 crates. 



100 acres inspected in the field. 



Spinach 115 bushels. 



Miscellaneous Plants 150. 



1 Quarantine No. 2, Domestic, (Revised), Canada Gazette, Vol. LV., No. 34, February 

 18th, 1922, page 3440. 



2 Notice of Quarantine No. 41, with Regulations (Revised), United States Department of 

 Agriculture, July 21st, 1921. 



