Garden Plants and Their Problems
ENEMY DAMAGE CONTROL
Rose (cont.)
Brown canker White spots with reddish Prune out in spring; sum-
  borders on canes. mer sprays as for black
    spot.
Stem canker Sooty areas near wounds. Always cut canes close
    above a bud or leaf; do not
    leave stubs.
Black spot Black spots with fringed Spray weekly with Fermate
  margins; in some varieties or sulfur or weak copper.
  leaves turn yellow and  
  drop.  
Powdery White coating on leaves, Eliminate old-fashioned
mildew canes, buds, which may not ramblers; spray weekly
  open. with weak copper, as in
    Tri-ogen, or sulfur; Fer-
    mate does not control.
Rust Reddish, later black, pus- Dust or spray with Fer-
  tules on leaves, prevalent mate and sulfur.
  in Southwest and northern  
  New York and New Eng-  
  land, not in Middle Atlan-  
  tic and Central States.  
Pith borers Small wasps or sawflies Do not prune back in fall.
  tunnel and lay eggs in pith. Paint larger canes after
    spring pruning.
Rose-of-Sharon
Aphids Dark aphids numerous at Any contact insecticide.
  tips of branches.  
Japanese beetles Feed on flowers and foli- Spray with DDT or lead
  age. arsenate.
Rudbeckia
(Coneflower)
Aphids Red lice on stem. Any contact insecticide.
Sassafras
Japanese beetles This is a favorite host. Spray with DDT or lead
    arsenate.



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