INJURIOUS INSECTS AND FUNGI. 27? 



ROSE-BUG OR -CHAFER (Macrodactylus subspinosu*), 

 Fig. 162. This insect needs no description, and no one 





FIG. 162. ROSE-BUG OR -CHAFER. 



(Riley : " Insect Life,' 1 Vol. II., p. 295, Fig. 61.) 



insect is more injurious to so many kinds of trees and 

 shrubs and none more difficult to destroy or prevent from 

 doing much harm. 



Remedy. Where Paris green can be safely used, as it can 

 be upon all trees and plants producing flowers that are not 

 cut for house or personal decoration or that produce no 

 edible fruit, this is the most certain remedy. On roses it 

 can be used until the blossoms are nearly open and longer 

 if the flowers are allowed to remain on the bushes until the 

 petals fall. Pyrethrum-powder dusted over the bushes each 

 forenoon and again in the afternoon in bright weather will 

 drive the beetles away, but they soon return and the remedy 

 must be repeated each day until they are done working. 

 If this powder has been kept over one season or a consider- 



