188 THE CARNATION MANUAL. 



hibition. There are many species of thrips not 

 easily distinguished the one from the other ; but 

 the species mostly found upon Carnations is Helio- 

 thrips hcemorrhoidalis ; it finds its way into the 

 flower-buds before they open, and feeds upon the 

 petals. In hot seasons, if the plants are neglected, 

 they become so numerous that they may be shaken 

 out in scores and hundreds into the palm of the 

 hand. The only way to keep them down is to 

 thoroughly S3a'inge the plants daily in the bud 

 state ; and the buds may be dusted when wet with 

 fine tobacco-powder. Plants in pots may be taken 

 into a greenhouse and well fumigated with tobacco 

 smoke. The fumigation does not injure the buds 

 or open flowers of the bizarre and flake Carnations, 

 or the Picotees. This troublesome pest does the 

 most mischief in hot, dry seasons. 



