Garden Plants and Their Problems
ENEMY DAMAGE CONTROL
Pine (cont.)"
White pine blis- Swollen blisters on bark. Remove alternate host-
ter rust   black currant for 1 mile;
    red currant and gooseberry
    for 300 feet.
PlTTOSPORUM
Aphids New growth curled. Contact spray.
Cottony-cushion Fluted white waxy masses Spray with parathion or
scale from brown shells; much Malathon or Volck.
  sooty mold.  
Plum
Scales - Euro- Large, brown, convex, soft, Dormant oil spray.
pean lecan- on twigs.  
ium, etc.
Japanese beetles Foliage of ornamental Rotenone or DDT; lead ar-
  plums lacy. senate is very injurious.
Plum curculio See Cherry, Peach.  
Brown rot Fruit rots, covered with See Cherry, Peach.
  gray spore cushions, mum-  
  mifies; trees may die; very  
  common.  
Black knot Black rough cankers on Cut out; dormant lime-sul-
  limbs, twigs. fur or bordeaux spray.

IN GENERAL, PLUMS TAKE SAME SPRAY SCHEDULE AS CHERRIES. SEE YOUR OWN COUNTY AGENT.

POINSETTIA  
Scales - olean- Yellow or brown or white Keep washed off; spray
der, soft, cot- scales on stem foliage. with Volck.
tony-cushion
Mealybugs White cottony ovals at ax- Volck or thiocyanate spray,
  ils. or remove with a toothpick.
Poplar
Oystershell scale Often weakens trees. Dormant oil spray.
Poplar borer Large beetle makes galleries Spray trunks with DDT.
  in wood, swollen scars out-  
  side.  




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