WINDOW GARDENING 



themums and kindred plants. The green form 

 is by far the more common and occurs on almost 

 all plants except those which are densely cov- 

 ered with trichomes or hairs. 



Plant-lice usually make their appearance on 

 the young and tender growth of the plant. If 

 left undisturbed the tender tips are soon covered 

 with them, the growth is checked and the plant 

 is finally ruined. As these are sucking insects 

 the substance applied must be one that will be 

 poisonous when breathed or by contact. In 

 greenhouses where fumigation is possible, to- 

 bacco fumes give the best results. This, how- 

 ever, would be a very disagreeable remedy for 

 the window garden and tobacco in other forms 

 may be used. The simplest method is to spray 

 the plants with an atomizer and then dust with 

 freshly powdered tobacco. The powdered to- 

 bacco should be left on the plants for several 

 days, or until the lice have disappeared, and 

 then removed by spraying. 



The best method is to spray with a solution of 

 nicotine. Although nicotine is quite expensive, 

 it is so efficient that only a small quantity is 



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