50 PROTECTION OF PLANTS, 1921-22 



Ohio 



Forty-two townships in Ashtabula, Cuyahoga, Erie, Lake, Lorain, Lucas 

 and Ottawa counties. 



Michigan 



Three townships in Monroe county. 



The 1921 results represent an increase of 127 townships in the infested area, 

 making a total of 327 townships under quarantine at the present time or approx- 

 imately 9253 square miles. 



Area infested in Canada 



As previously stated, the European Corn Borer was not discovered in Ca- 

 nada until 1920. In that year two separate infestations were found in Ontario. 

 The first and less severe of the two comprised 3 townships in Welland County 

 and two in Haldimand County, bordering Lake Erie. The second infestation 

 contered about the St. Thomas district and included all of Elgin County, the 

 majority of Middlesex County; 6 townships in Oxford County, 4 townships in 

 Kent County, and one in Huron County; a total of 35 townships and covering 

 an area of 2780 square miles. 



In 1921, in Ontario, we also experienced a much greater spread of the insect 

 than was expected. A total of 65 additional townships were found infested and 

 it was considered advisable to add seven others to the quarantine on account of 

 their respective situations. At the present time there are 107 townships under 

 quarantine in southern Ontario, covering a total of 8214 square miles and includ- 

 ing the following areas; Welland, Haldimand, Brant. Norfolk, Oxford, Waterloo, 

 Middlesex, and Elgin counties; the townships of Clinton, Cainsboro, Grant- 

 ham, Louth, and Niagara in Lincoln county; the township of Ancaster in Went- 

 worth county; Perth county with the exception of Elma and Wallace townships; 

 the townships of Goderich, Stanley, Tuckersmith, Hay and Stephen in Huron 

 county; the townships of Warwick, Brooke and Euphemia in Lamhton county; 

 the townships of Orford, Howard, Harwick, Raleigh, Tilbury East, Romnej'^, 

 Zone, Gore of Gamden and Camden in Kenfcouniy ; the townships of Mersea, 

 Gosfield South and Pelee Island in Essex county, and the township of Pickering 

 in Ontario county. 



As will be noted there was enormous spread of the insect in Ontario in 1921 

 but as all conditions were unusually favorable it is hoped that a much less area 

 will be involved in the succeeding season's spread. The majoritj' of the in- 

 creased distribution is apparently natural but the isolated collection in Picker- 

 ing and the Essex and southern Kent County infestations indicate artificial 

 transportation of the insect. 



