98 How TO Grow Cut Flowers. 



The Leaf Roller, though comparatively new under 

 glass, is a great annoyance, and as yet no remedy has 

 been discovered for it but hand picking. Its presence 

 will be indicated by the rolling of a leaf, an examina- 

 tion of which reveals a worm about a half an inch in 

 length, enveloped by a web around which the leaf rolls. 

 These greatly disfigure the foliage if allowed to remain, 

 and I am told some growers find it necessary to make 

 a thorough and systematic search for them every morn- 

 ing. Protected as they are by both web and leaf, noth- 

 ing in the way of liquids or fumes have any effect upon 

 them. 



At some seasons of the year an insect known as Thrip 

 is more or less troublesome. Prof. Baker, of Michigan 

 Agricultural College, to whom we are greatly indebted 

 for the publicity he has given to his researches regard- 

 ing the habits of injurious insects, says of this : " These 

 belong to the family Thripidse, the members of which 

 may be recognized by the following characterestics : 

 They have four long, narrow membranous wings which 

 are fringed with long hairs and sometimes have one or 

 two longitudinal veins; in repose the wings lie along 

 the back. The mouth parts resemble somewhat those 

 of biting insects, and somewhat those of sucking insects. 

 The body is long and narrow, the head being somewhat 

 narrower than the thorax. The compound eyes are 

 large, and there are three simple eyes. Some forms are 

 wingless, in this species the male being wingless. They 



