PLANT ENEMIES 



51 



Potato bug. 6, 7. 



Potato scab. F, G. 



Raspberry cane borer. Cut off 

 cane and burn. When pruning 

 in Summer for the branching 

 of the new canes, cut below 

 drooping canes; these should 

 be burned. 



Red spider. Spray with water, 

 using force; no insecticide neces- 

 sary if spraying is done. 



Rhododendron lace wing fly. 

 Spray with 1 or 2. 



Root lice. Water with 1 or 2, 

 use tobacco stems about the 

 plants; use soot and do not 

 plant the same kind of plants 

 in the infested soil a second 

 season. 



Rose black spot. B. 



Rose bug. Hand pick into cans 

 of kerosene. 



Rose slug. 6. 



Rusts. A, B, C. 



Scale, in greenhouse, 2; fruit 

 trees, E. 



Slugs. 6, 7, 8, 9. 



Smut. E. 



Snapdragon anthracnose. A. 



Sowbug. 9; lime and salt may be 

 scattered where plants are not 

 injured. 



Thrips. 1, 4, 10. 



Violet leaf spot. In field spray 

 with A; in greenhouse do not 

 allow the atmosphere to be- 

 come too moist. Destroy in- 

 fested leaves. 



Violet sawfly. 6 or 8. 



Weevils in stored grain. 11. 



White fly. 10. 



White grubs. Fall plow to ex- 

 pose the insects to the cold. 



