The native C. flaccida which is the larje-flowered 

 parent of the newer "orchid-flowered" cannas 



last year. A further list of varieties by color 

 and height is given on page 30. We should 

 be glad to have the readers of The Garden 

 Magazine express their opinions and make 

 any corrections or substitutions in the names 

 given, so that a really reliable list of the 

 best cannas may be compiled. 



ONE LITTLE INSECT PEST 



The claim is often made that in addition to 

 its other good qualities the canna is an almost 

 ideal garden plant, because it is immune to 

 insect attack. It is true that the canna suffers 

 practically not at all from insects, but it has 

 its own pet bug, specimens of which were 

 sent to us several times in the spring, and 

 it would seem that there is a new outbreak 

 of the lesser canna leaf-roller, which has been 

 identified from Louisiana by Dr. F. H. 

 Chittenden. This insect {Hydrocampa can- 

 nalis) was first noted as injurious in Florida 

 in 1898, and though it has not been observed 

 since then until this year, it is probably to be 

 found throughout the Gulf States. 



The insect hibernates in the old leaves. 

 The moths emerge early in March and 

 deposit their eggs on the young leaves as 

 soon as they appear. The caterpillars tie 

 the edges of the leaves together with strands 

 of silk in the manner of '' leaf-rollers," and 

 then feed within the unrolled leaf, eating 

 off the upper surface and inner tissue of 

 the leaf, and but rarely penetrating or feeding 

 upon the under- or, as it is rolled, the outer- 

 surface of the leaf. The moths emerge 

 about thirty to forty days after the eggs are 

 laid, so that there are several generations 

 in a season. The pupas remain over winter 

 in the dead leaves, so the simplest method 

 of control is to collect and burn all the dead 

 leaves in the fall. 



As soon as the work of the young cater- 

 pillars is noticed in the spring, by the edges 

 of the leaf being tied and failing to unfold, 

 infested leaves should be cut off and 

 destroyed. The full-grown caterpillar is 

 about an inch long, transparent yellowish 



The modern type is broad-pe.&Jed and densely 

 flowered. A valuable bedding plant 



The canna of fifteen years ago. Note the sparsity 

 of open flowers and their comparatively small size 



white with brown head, the body bearing of about one inch and the wings are 

 numerous slightly darker tubercles. The marked with two narrow brownish black 

 moth is a light brown, having a wing expanse lines running across both wings. 



A single canna root is all-sufficient for a small flower bed. It will produce ten or a dozen shoots in ft 



season and bear fifteen hundred blooms 

 19 



