22 



It is desirable to keep the land well moved between the 

 plants, and to push their growth on quickly with nitrate of 

 soda. It is in the earlier stages of growth that the maggots do 

 most harm. 



The land should be deeply ploughed after a crop of mangels 

 that have been infested, and a corn crop taken so that the soil 

 may not be ploughed again until after the succeeding summer. 

 All leaves and decayed leaves should be spread on the land and 

 ploughed in, or raked together after the roots are tapped and 

 burnt or buried deeply. 



Curtis remarks of this insect that parasites no doubt keep it 

 under,* and that we may trust to them for assistance. This is the 

 fact, as four Ichneumon flies came from the 20 pupa3 in my glass 



* Farm Insects, by J. Curtis, page 397. 



