INSECTS, DISEASES, AND REMEDIES 147 



on the watch for this insect, and must 

 be persistent in using means to destroy it, 

 as it will soon do serious harm to the young 

 growth. Fumigating with tobacco stems 

 has until recently been the orthodox remedy, 

 and is still used to considerable extent. 

 The stems must be kept moist while being 

 burned to prevent them from being con- 

 sumed too rapidly; otherwise the plants are 

 likely to be damaged. The fumigating is 

 better for being done in the evening and, if 

 possible, when the weather is cool. Just 

 how heavy the fumigation should be can 

 be determined only by experience; but the 

 beginner may soon learn how much to apply 

 by giving the plants a fumigation three 

 nights in succession, making the smoke 

 quite thin, so that objects can be seen across 

 the house the first time, increasing the 

 amount the second night, and, if the aphis 

 is not destroyed, increasing still more the 

 third evening. 



Of recent years there have been placed on 

 the market by different manufacturers 

 various preparations of nicotine, which are 

 more convenient and pleasant to use, al- 

 though probably somewhat more expensive. 



