574 INSECT PESTS OF FARM, GARDEN AND ORCAHRD 



Haseman (1. c.) states that insecticides have been of little 

 value in the control of the insect in nurseries and recommends 

 that injury be prevented by destruction of the weeds which 

 harbor it, particularly members of the Composites of which the 

 "Mare's tail" (Erigeron canadensis) is said to be the most 

 important. 



