214 DISEASES AND INSECT ENEMIES. 



with refuse in the shape of garbage and other 

 material, the pest is apt to breed. 



There is no satisfactory remedy for this mag- 

 got when once it has infested a house. We cannot 

 speak as to the effect of cyanide gas upon it, for, so 

 far as we know, this remedy has not been tried. 

 It is not practicable to pick the leaves, because in 

 such cases the crowns are permanently injured 

 and the flowering is, therefore, either entirely 



w 



61Larvze and moths of Phlyct&nia ferrugalis. 



stopped or checked. Air-slacked lime thrown 

 into the crowns will be found beneficial. It should 

 be thrown into the plant with considerable force 

 and plenty should be allowed to reach the soil. 

 Following this practice and giving the best cul- 

 tural conditions possible, such as allowing plenty 

 of air and stirring the soil, is about all that can be 

 suggested in the line of treatment. 



Phlyctaenia ferrugalis. Violet plants are 



