234 A COUNTRY READER. 



mangels when the rotation of turnips comes 

 round again. 



To avoid infection, whenever possible, the dis- 

 eased crop should be burnt, on no account should 

 it be left in the field or thrown upon the dung 

 heap. 



Dressing the land with lime has the effect of 

 killing the spores in the soil. 



Cheese Fly. In parts of the country where 

 cheeses are made, in farmhouses, this fly is a 

 great plague. It is a very small fly, one-fifth of 

 an inch long, slender, almost hairless, with dirty 

 yellow legs and wings of glassy clearness. 



If a hard cheese has not been well pressed, or 

 if there is the slightest crack anywhere, these 

 little insects will settle on the cheese and lay their 

 eggs, which, turning into white maggots, soon 

 begin their work of destruction. 



When the time for the maggot to pass into the 

 pupa, or resting-place, comes round, the insect 

 will crawl out of the cheese and turn into a pupa 

 on the walls, or on any straw close at hand. 



Remedies : Great cleanliness in the cheese- 

 ripening room ; constant whitewashing of the 

 walls ; gauze screens outside the window suffi- 

 ciently fine to keep the fly out ; keeping the 

 cheese -ripening room dark ; red -leading the 

 joints between the boards, so that the fly cannot 

 work upwards through the floor. 



