INSECT 
CONTROL MEASURE 
REMARKS 
Red spider 
Chlorobenzilate, Aramite, 
or Malathion spray. 
Dithio bomb or smoke gen- 
erator. 
Aramite or Malathion bomb 
often effective. | 
———= | 
Parathion bomb, spray, or 
dust. 
In the presence of sulfur 
may cause leafdrop on 
roses. Will bleach color 
of mums and poinsettia | 
flowers. 
OMPA bomb. 
Combination of OMPA and 
chlorobenzilate in a bomb | 
is excellent. 
TEPP bomb or spray. 
Avoid wetting soil with | 
spray. 
Ovotran bomb or spray 
or vaporized from steam 
Pipes. 
Causes leafdrop on roses | 
in dark weather. Not com- 
patible with sulfur. 
Sodium selenate on toler- 
ant crops. 
Carnations, mums, asters, 
snapdragons, cyclamen, and 
Saintpaulia. 
Rotenone sprays. 
Any, 
inside or 
outside 
Lindane, Die!ldrin, Mala- 
thion, Parathion, DDT 
Lack effectiveness of other | 
materials. 
Parathion and DDT injure | 
Kalanchoe and some other 
succulents. 
Gladiolus 
bulbs 
Leaf roller 
Mum midge 
White fly 
Leafhopper 
Tarnished 
plant bug 
5% DDT dust. 
letton 3 8Oz. 
bulbs. 
per bushel of 
Corrosive sublimate, Lysol, 
or formaldehyde. 
Bulb disinfectants. 
B Spittlebug 
Di- 
TEPP, 
Malathion,  Lindane, 
thion, Parathion, 
Nicotine, Rotenone. 
DDT or Parathion. 
Lindane, Dieldrin. 
Scale 
Malathion spray or Dithio 
bomb or smoke generator. 
| 
Apply regularly after young 
scale hatch and 
crawler stage. 
Mealybugs 
Malathion spray, Dithio 
bomb or smoke generator, 
Parathion bomb, spray, or 
dust. 
Repeated applications nec- | 
essary. Parathion not rec- 
ommended on 
showing color. 
poinsettias | 
Ants 
Grasshoppers 
Chlordane, Dieldrin. 
Slugs 
Snails 
Cutworms 
Sowbugs 
Snailicide, Snarol. 
DDT dust for sowbugs. 
Leafminer 
Foliar 
nematode 
Chrysanthemum 
Parathion spray, OMPA 
bomb, sodium selenate. 
Rose midge 
Strawberry 
root worm 
DDT sprayed on _ plants, 
walks, and benches three 
times at 10-day intervals. 
Pinch and destroy heavily | 
infested shoots. 
Root 
aphids 
Fern 
Palm 
Poinsettia 
Lindane—1 oz. of wettable 
powder per 30 gal. and 
apply as a liquid fertilizer. 
On bench crops apply 1 oz. 
per 100 sq. ft. in a con- 
venient amount of water. 
Corn ear 
worm 
Chrysanthemum 
DDT repeatedly. 
Often destroy flowers over 
night. 
Begonia 
Cyclamen 
English lvy 
Saintpaulia 
Snapdragon 
Foliage plants 
Symphylids 
Any 
OMPA bomb, Parathion 
spray, Nicotine and 
rotenone spray. 
Repeated applications 
necessary. 
Lindane—same as for root 
aphids. 
Yearly treatment advised. 
Stem rot 
Damping-o 
DISEASE 
ff 
Black spot 
Botrytis or 
petal blig 
Mildew 
Root rot 
Soft rot 
CONTROL MEASURE 
| 
Arasan, 
Captan, Fermate, 
Zerlate, Parzate, Semesan. 
REMARKS 
Destroy diseased plants. 
When treating seeds, cover 
lightly. Use at 1 teaspoon 
per gallon and apply as 
liquid fertilizer to soil 
where plants are growing. 
Steam sterilize soil mix- 
ture and pots. 
Fermate or Captan. 
Chrysanthemum 
English Ivy 
ht 
Carnation 
Chrysanthemum 
Snapdragon 
Calendula 
Chrysanthemum 
Hydrangea 
Rose 
Saintpaulia 
Leafspots 
Foliage 
blights 
are in || _ 
Rust 
Root-knot 
nematode 
Stunt 
Aster 
Azalea 
Begonia 
Carnation 
Chrysanthemum 
Cyclamen 
English Ivy 
Gardenia 
Geranium 
Hydrangea 
Captan, Fermate, Zerlate, 
Parzate. 
Avoid injury to stems when 
potting or planting. Don't 
plant too deep and avoid 
overwatering. 
Avoid splashing water on 
foliage. Regular spraying 
necessary. 
High humidity favors its 
development. Use some 
heat and ventilation even 
in mild weather and _ in- 
stall fans to circulate the 
gir. 
Avoid — splashing 
with water. 
foliage 
Avoid temperature drops 
which increase relative hu- 
midity and encourage 
growth of the mildew 
fungus. 
Common on white or soft 
varieties of carnations and 
chrysanthemums. Light Par- 
zate dusting weekly when 
color appears. 
No fungicide is effective if 
heat and ventilation are 
not regulated correctly. 
Fans may be helpful. 
Mildex spray or Karathane | 
smoke generator. 
Wettable sulfur sprays plus 
a spreader or sulfur dusts. 
Spergon—2 oz. 
and 
per gal. 
soak 3 hours. 
1 Ib. New Improved Cere- 
san per 50 gal. and soak 
1 hour. 
Formaldehyde 1-50 and 
soak 1 hour. 
Spray when plants will dry 
rapidly. 
Often bleaches flowers. 
Parathion and sulfur cause 
leafdrop on roses. 
Remove all rotted portions 
before soaking. Steam all 
soil and pots. Plant im- 
mediately after soaking. 
Captan, Fermate, Zerlate, 
Parzate. 
| Avoid 
Aster 
Carnation 
Chrysanthemum 
Snapdragon 
Captan, Fermate, 
Parzate, sulfur. 
Zerlate, 
splashing water on 
foliage. Give plenty of 
space and air. 
Avoid splashing water on 
foliage. 
Any 
Steam soil, pots, and bench 
areas where pots have been 
placed. 
Methyl bromide fumigation 
also very effective. 
Chrysanthemum 
Destroy infected plants. 
Buy stunt-free cuttings. 
Branch rot 
Carnation 
Geranium 
Captan, Fermate, Zerlate, 
Parzate. 
Avoid overhead syringing. 
Break off geranium flowers 
underneath flower head. 
Crinkles 
Geranium 
Destroy plants that have 
this virus. 
Watersoaked areas or spots 
appear on foliage in win- 
fer. 
Leafscorch 
Chlorosis 
Gall 
Mosaic 
Yellows 
Croft Lily 
Azalea 
Gardenia 
Hydrangea 
Keep soil pH 6.5 to 7.5— 
apply lime to soil. 
Avoid acidifying — fertiliz- 
ers. Use nitrate of soda 
1 oz. per 2 gal. every 
other week. 
Re-establish root action by 
carrying on the dry side. 
Sequestrene at 1 teaspoon 
per 2 gal. or iron sulfate 
at 1 oz. per 2 gal. 
caused by high 
pH, over-watering, root- 
knot nematodes, symphy- 
lids, or too much ferti- 
lizer. 
May be 
Azalea 
Hand pick or spray with 
Bordeaux mixture. 
Pinkish white puffy growths 
on leaves. 
Any 
Destroy badly infected 
plants. 
Often spread by aphids. 
Keep them under control. 
Aster 
Chrysanthemum 
DDT repeatedly. 
Compiled by 
OHIO FLORISTS’ 
Cloth houses keep out leaf- 
hoppers which spread this 
Virus. 
ASSOCIATION 
