78 HOUSE PLANTS 



one end of the box make a hole big enough 

 to put a saucer through. Cut open the sides 

 of the bags in such a way that they can be 

 pasted together again to make one large bag, 

 the open end of which will fit over the box. 

 Now place the plant or plants to be fumi- 

 gated on the still inverted box and draw the 

 big paper bag down over them and tie it 

 securely to the box with a string. In the 

 saucer place one of the forms of tobacco — 

 ground tobacco, or tobacco soaked paper 

 or tobacco punk — light and place it inside 

 of the box. Be very careful when fumiga- 

 ting the plants not to use the tobacco too 

 strong or the leaves will become scorched. 

 When the sack has become sufficiently filled 

 with tobacco, remove the burning tobacco 

 from the box. Let the plant stand half an 

 hour with the sack on, then remove it, and 

 syringe the plant with water to knock off 

 the stupified aphides. Two light fumigations 

 on succeeding days are much less liable to 

 injure the plant than is one strong fumigation. 



THE ROOT APHIS 



An aphis sometimes attacks the roots, 

 causing the plants to take on a sickly or 



