All About Violets 193 



appearance of the leaves, in that they become 

 white, as a result of the tissues being destroyed. 

 They are in appearance and size similar to unripe 

 red peppers. Remedy : they may easily be kept in 

 control by syringing properly with cold water 

 applied to the under side of the leaves, using a 

 fine nozzle with a pressure of at least thirty 

 pounds. Green fly may be kept in control by 

 fumigating with either nico-fume paper or vapor- 

 izing in the liquid form. All open flowers should 

 be picked off before fumigating. This operation 

 should always be done at night, whereas the 

 syringing should be done in the morning of a 

 bright day as far as possible. The best remedy 

 for green fly is cyanide of potassium used in 

 conjunction with sulphuric acid, but this is an 

 extremely dangerous vapor in inexperienced 

 hands. 



Violets may be grown successfully in southern 

 New England, eastern New York, and New 

 Jersey, without artificial heat, by using a double 

 frame and also double-glazed sash, with mats of 

 straw or other material with board shutters to 

 keep the latter dry. 



Build a frame in the usual way in a unit of one, 

 two, or more sash as needed. Have the back of 

 the frame about twenty inches high and the 

 front twelve inches in height. Next, get two-by- 



