PEST and DISEASE CONTROL CHART 
PEST 
Red spider 
(normal) 
a 
Red spider 
(phosphate 
resistant) 
Red spider 
(Aramite 
resistant) 
Scale 
Thrips 
Mealybugs 
Aphids 
Leaf roller 
Sowbugs 
Mum midge 
Leafhopper 
White fly 
Tarnished 
plant bug 
Corn ear 
worm 
Ants 
Grasshoppers 
Slugs, Snails 
Cutworms 
Leafminer 
Foliar 
nematode 
| Mite 
Rose midge 
Strawberry 
root worm 
Fuller's 
rose weevil 
Spittlebug 
Root 
aphids 
Symphylids 
Earthworms 
Root 
nematodes 
CROP 
Any 
Any 
Gladiolus 
bulbs 
Any 
Any 
Any 
Chrysanthemum 
Any 
Aster, Azaleas, 
Chrysanthemum 
Chrysanthemum 
Begonia 
Cyclamen 
English Ivy 
Gloxinia 
St. Paulia 
Snapdragon 
Foliage plants 
Others 
Rose 
Any 
Fern 
Palm 
Poinsettia 
Any 
Any 
CONTROL MEASURES 
Aramite, Chlorobenzilate, 
or Malathion spray. 
Parathion 
or dust. 
bomb, _ spray, 
Aramite, Chlorobenzilate, 
Dithio, or OMPA bombs. 
Systox on soil. 
Dithio bomb; Aramite 
bomb, spray, or vaporized 
from steam pipes; Chloro- 
benzilate spray or bomb. 
REMARKS 
Technical Aramite vapor- 
ized from steam _ pipes 
every 5 days. 
Causes leafdrop on roses 
if sulfur is present. May 
bleach open mums. 
Sometimes vary in 
effectiveness. 
their 
Fumes very poisonous. 
- 
Alternate materials to 
avoid quick build up of 
resistant population. 
Alternate Dithio and Chlo- 
robenzilate bombs; Chloro- 
benzilate - OMPA bomb 
every 5-7 days. 
Malathion spray. 
Dithio bomb. 
Dieldrin, 
thion, or 
spray. 
Lindane, Mala- 
DDT dust or 
Dieldrin or DDT dusts. 
Alternate materials. Chlo- 
robenzilate—Meta  Systox 
bomb useful. 
Repeated applications ne- 
cessary. 
3 times at 3-5 day in- 
tervals—kills crawlers only. 
ee ae ae 
Parathion in any form also 
useful. 
Cover lightly before stor- 
ing. 
Malathion spray, Dithio 
bomb, or Parathion as 
bomb, spray, or dust. 
With any of 
peated 
cessary. 
these, re- 
applications ne- 
Malathion spray, Lindane 
dust or spray, Dithio bomb, 
Parathion as bomb, spray, 
or dust. 
OMPA bomb or Systox on 
soil also useful but are 
slower to act and have 
longer lasting effect. 
Parathion bomb, spray, or 
dust, as well as DDT dust 
or spray. 
DDT dust or spray. 
Chlordane, 
Snarol. 
Dieldrin, or 
Parathion spray, OMPA 
bomb, or Systox on soil for 
soft-stemmed plants. 
Use leafminer controls. 
Endrin 
Dimite 
Rotenone and nicotine 
combination as spray. 
DDT spray. Three applica- 
tions on plants, soil, and 
walks 12 days apart. 
Dieldrin or Lindane. 
Lindane 1 oz. of the 25% 
wettable powder per 30 
gallons. 
Lindane—see root aphids. 
For bench crops use 1 oz. 
per 100 sq. ft. 
Chlordane or DDT on soil. 
Steam sterilize soil and 
pots. 
Dow MC-2. 
Compiled by the 
OHIO FLORISTS’ ASSOCIATION 
Malathion effective on leaf 
rollers. 
Dieldrin good control for 
tarnished plant bug. 
This pest eats the flowers. 
Snailicide containing met- 
aldehyde excellent control 
for slugs, snails, and cut- 
worms. 
New and very effective. 
Often causes injury. 
Must be applied every 5 
days. 
Pinch and destroy heavily 
infested shoots. 
White frothy ‘‘spit’' identi- 
fies this plant stinging pest. 
Apply like a liquid fer- 
tilizer. 
One treatment usually ef- 
fective for a year. 
Steam sterilize when pos- 
sible. 
Steam bench area where 
infested plants grew. 
Contain methyl! bromide. 
DISEASE 
Damping-off 
Stem or 
root rot 
Rust 
Black spot 
Botrytis or 
petal 
blight 
Mildew 
Leafspots 
Foliage 
blights 
Canker 
Blackleg 
Black 
mold 
Stunt 
Mosaic 
CROP 
Any 
Aster 
Begonia 
Carnation 
Chrysanthemum 
CONTROL MEASURES 
REMARKS 
Fermate, Zerlate, 
Captan, or Se- 
Arasan, 
Parzate, 
mesan. 
sterilize soil and 
Avoid recontamina- 
Steam 
Pots. 
tion. 
1 teaspoon per gallon and 
flood affected area. Dust 
seed lightly. 
Don't injure stems of cut- 
tings or seedlings when 
potting or planting. 
Fermate, Zerlate, Parzate, 
Captan, Semesan. 
See damping-off. Don't 
plant deep; avoid over- 
watering. 
2 oz. Spergon in 1 gal. 
water for 3-hour soak. 
1 Ib. New Imp. Ceresan to 
50 gal. water. Soak 1 hour 
and plant. 
Formaldehyde 1-50 for 1 
hour. 
Remove rotted portions of 
calla before treatment. 
Steam soil and pots. 
Steam sterilize soil & pots. 
Steam or rotate plantings. 
Steam sterilize soil & pots. 
Propagate from  disease- 
free plants. 
Steam sterilize soil & pots. 
Keep soil pH 6.0-6.5 and 
calcium at 150-200 ppm. 
Steam sterilize soil & pots. 
Buy cultured cuttings. 
Cineraria 
Steam sterilize soil & pots. 
Aster 
Carnation 
Snapdragon 
Captan, Fermate, Zerlate, 
Parzate, or sulfur. 
Rose 
Keep foliage dry and new 
growth covered lightly with 
fungicide. 
Captan or Fermate. 
Avoid overhead syringing. 
Chrysanthemum 
English Ivy 
Captan, Fermate, Zerlate 
or Parzate. 
Chrysanthemum 
Snapdragon 
Others 
Calendula 
Chrysanthemum 
Hydrangea 
Rose 
Saintpaulia 
Snapdragon 
Aster 
Azalea 
Begonia 
Carnation 
Chrysanthemum 
Cyclamen 
Gardenia 
Geranium 
Hydrangea 
Camellia 
Gardenia 
Rose 
Geranium 
Rose 
Geranium 
Carnation 
Chrysanthemum 
Parzate dust applied 
weekly when color shows. 
Repeated applications ne- 
cessary. Cover lower sur- 
face of leaves. 
Keep flowers dry. Reduce 
humidity with heat and 
ventilation. Use fans to 
circulate air. 
Sulfur dust or spray. Sul- 
fur vaporized from steam 
pipes or light bulb in 
metal can. 
Sulfur often bleaches flow- 
ers. Parathion and sulfur 
together cause leafdrop on 
roses. 
Mildex spray regularly. 
Avoid drafts or infection 
will spread rapidly. 
Captan, Fermate, Zerlate, 
or Parzate sprays applied 
to thoroughly cover all of 
the plant. 
Remove and destroy in- 
fected shoots. Sterilize 
shears after each cut by 
dipping in rubbing alco- 
hol. 
Take cuttings from tops 
of plants. Steam sterilize 
soil mixture and pots. 
Reduce humidity with heat 
and ventilation. 
Pick off and destroy badly 
infected leaves, keep fo- 
liage dry, give more space 
and air. 
Shoots wilt and die. May 
kill entire 
infected 
moved. 
plant unless 
shoots are re- 
Infected plants have 
orange-yellow inner bark. 
See Camellia. 
Spray plants regularly with 
Captan or Parzate. Discard 
diseased plants. 
Avoid leaving stubs. 
Grow stock plants inside. 
Use coarse propagating 
sand and water sparingly. 
Soak dormant manetti in 
1 pint formaldehyde to 40 
gal. water or 1 |b. potas- 
sium permanganate per 25 
gal. water for 2 hours. 
Don't injure stems tearing 
off flower stalks; break off 
just underneath flower 
head. 
Captan or Parzate sprays. 
Destroy infected plants. 
Cyclamen 
Any 
Yellows 
Spotted 
Wilt 
Crinkles 
Chlorosis 
Leafscorch 
Foliar 
dieback 
Gall 
Asters 
Chrysanthemum 
Many others 
Calla 
Geranium 
Azalea 
Chrysanthemum 
Gardenia 
Hydrangea 
Snapdragon 
Lily 
Snapdragon 
Azalea 
Steam sterilize soil and 
Pots. 
Spray empty grafting case 
with 1 Ib. Bordeaux per 
5 gal. water. 
Keep foliage and stems 
dry. 
Buy stunt-free plants. 
Destroy infected 
plants. 
badly 
Spread by aphids. 
Grow under cloth. If out- 
side, DDT sprays re- 
peatedly. 
Destroy infected plants 
keep thrips under control. 
Destroy plants that have 
this virus. 
Often due to poor root 
action. Check for excessive 
fertilizer, high pH, root 
nematodes, symphylids, or 
waterlogged soil. 
Keep soil pH 6.5 to 7.5— 
apply lime to soil. 
No control known except 
hand picking of leaves. 
Bordeaux spray or hand 
pick. 
Spread by _ leafhoppers. 
Control by DDT sprays 
not always satisfactory. 
White or yellow spots or 
rings on leaves. Flowers 
may be distorted. 
Watersoaked spots or areas 
appear on foliage in win- 
ter. 
Use chelated iron at 1 
oz. per 10 to 20 gallons. 
Use acid peat in soil 
with azaleas, gardenias, 
and hydrangeas. 
Avoid acidic fertilizers— 
use nitrate of soda at 1 
oz. to 2 gal. every other 
week. 
Tips of leaves wilt back 
to stem; stem dies. 
Pinkish white puffy growths 
on leaves. 
