EXPERIMENT STATION BULLETINS. 



173 



Fig. 22. — Coccooa of diamond-back moth, enlarged. Original. 



marked yellowish stripe on each wing-cover. The larva is said to be 

 long and slender, and to mine in the leaves of young cabbage plants. 



REMEDIES. 



The worst damage is inflicted by 

 this little pest, when the plants are 

 young and long before the heads are 

 formed. At this time a spray of paris- 

 green and bordeaux will serve to check 

 them, the bordeaux acting as a repel- 

 lant. It is probable that tobacco dust 

 would also serve the purpose, if dusted 

 on the 3'ouug plants. After the heads 

 commence to appear it is unsafe to use 

 an}- of the arsenites. 



Cabbage Curculio {Ceutliorhynchus rapae). 



A small beetle that tunnels in the 

 leaf-stems, crown and larger veins of 

 the cabbage, is described in Bui. 23, 

 Bureau of Entomology, of the U. S. De- 

 partment of Agriculture. The beetle is 

 credited to Michigan among other 

 states, having been found here by Pro- 

 fessor A. J. Cook, many years ago. 

 This beetles belongs to the curculios and is about one-eighth of an inch 

 long, broadly oval in form, the color being black modified by fine light 

 grey hairs. The species is carefully and fully described by Mr. F. H. 



Vin. 23.- 



-Parasite of diamond-back moth, 

 enlarged. Original. 



