Garden Plants and Their Problems
ENEMY DAMAGE CONTROL
Magnolia
Scales, magno- Large brown hemispheri- Dormant oil spray (use a
lia and tulip- cal scales on twigs and summer oil, miscible oils
tree branches; with sooty mold. may be injurious).
Mallow (Rose)
Japanese beetles Flower eaten. Dust with DDT.
Maple
Aphids, espe- Drop honeydew on walks, Use contact spray early in
cially Norway cars, etc. Japanese maple season.
maple aphid often curled by aphids.  
Verticillium Limbs on one side or whole Remove.
wilt trees die.  
Leaf scorch Sugar maples react to high No control except adequate
  temperature. watering.

THERE ARE MANY INSECTS AND A NUMBER OF DISEASES POSSIBLE ON MAPLE. DO NOT USE OIL SPRAYS ON SUGAR OR JAPANESE MAPLE; DO NOT USE LEAD ARSENATE OR DDT ON THE LATTER, IT MAY BE SEVERELY INJURED.

Marigold
Japanese beetles African marigolds de- Spray or dust with DDT or
  voured, French seldom lead arsenate.
  bothered.  
Botrytis blight Gray mold in wet weather Cut off fading flower heads.
  on flowers.  
Meadow Rue
(Thalictrum)
Aphids Lavender-colored lice clus- Spray with nicotine-soap.
  ter thickly on buds, may  
  prevent bloom.  
Mimosa
Mimosa web- Branches webbed together. Spray with DDT or lead
worm   arsenate.
Mimosa wilt Soil fungus causes wilt and Get resistant strain.
  death.  



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