59 



Th.8 course prevent^ the parent fly f,oin obtaining any young wheat upon which to lav their 

 ^'.. and destroy, the prospects of another generation' A fertile, thoroughly-e!5t "ated an 

 well dra.ned soil ,s as effectual a means of escaping l„ss from the attack of this insect a 'any 

 probably tha can be mentioned. Benefit may also be derived from the sowing only of an 

 approved flmty-stemmed variety of wheat, whi.-h is thus more capable of re , "tin. the fly's 

 attacks upon U. But after all the chief reliance for immunity is to be pilced "upon the 

 labours of the parasitic msects mentioned above. ^ ^ 



