32 



seed soon die, and are not able to lay their eggs in the field. This 

 method is only partially effective, since many weevils make their 

 escape before they can be bagged. 



The boiling water treatment has also been used for many years. 

 The infested seed is thrown into boiling water l jr one minute, then 

 quickly removed. This method has never been w lely adopted, since 

 the germ is very apt to be injured by longer immersion than one 

 minute in the boiling water. >^ 



Fig. 9. ' Fumigation [house' at the Ontario Agricultural College. There are two 

 doors, one in front and the other in the rear, to facilitate ventilation ; the door is 

 driven up tightlj" against [the felted casement by means of large wooden buttons. 

 (Original.) 



Infested peas may be treated successfully by heating them to a 

 temperature of 145 ^ F. without injury to the germ, but this method 

 has never been widely adopted, for obvious reasons. 



Although we have never tried the coal oil treatment, some of our 

 correspondents report successful results, and outline the process as 

 here described : The peas are spread on the barn floor in a thin 

 layer about six inches deep ; and the oil is sprinkled over the seed 

 through a machine oil-can Then the peas are turned over very 

 thorouo-hly so that every pea becomes coated with a thin film of oil. 

 In this condition the peas are left for two or three days, when it will 

 be found that the weevils have been killed. One quart of oil is suflic- 

 cient for twenty bushels of peas. 



This method is to be recommended in the treatment of small 

 quantities, such as seed peas ; but we are of the opinion that it would 

 not be a practicable method for treating peas in large quantities 

 immediately after harvest. 



