PEST and DISEASE CONTROL CHART 
INSECT 
CROP 
CONTROL MEASURE 
REMARKS 
Red spider 
Any 
Parathion bomb, spray, or 
dust. 
Parathion in the presence 
of sulfur causes leafdrop 
on roses. Parathion bombs 
not advised on open mums. 
Dithio bomb or smoke gen- 
erator. 
Aramite spray or bomb, 
Chlorobenzilate spray. 
Kills adults only. No re- 
sidual effect. 
Use 114 Ibs. of the 15% 
wettable powder per 100 
gal. plus a spreader and 
thoroughly cover the plant. 
Non-poisonous to humans. 
Use 1 Ib. of the 25% 
wettable powder per 100 
gal. plus a spreader. Thor- 
ough coverage essential. 
Malathon spray or bomb. 
Use 1 to 2 Ibs. of the 25% 
wettable powder per 100 
gal. plus a spreader. 
TEPP bomb or spray. 
Avoid wetting soil with 
spray. 
Ovotran (K-6451) bomb or 
spray or vaporized from 
steam pipes. 
In dark weather this may 
cause leafdrop on roses. 
Not compatib.e with sulfur. 
Sodium selenate on toler- 
ant crops. 
Dimite spray. 
Carnations, mums, asters, 
snapdragons, cyclamen and 
Saintpaulia. 
Use at 1-1200 or 1-1600. 
Rotenone sprays. 
Lacks effectiveness of other 
materials. 
Thrips 
Aphids 
Leaf roller 
Mum midge 
White fly 
Leafhopper 
Tarnished 
plant bug 
Scale 
Mealybugs 
Any, 
inside or 
outside 
Gladiolus 
bulbs 
Parathion, Lindane, 
Malathon, DDT. 
5% DDT dust. 
Corrosive sublimate, Lysol, 
or formaldehyde. 
Dithion, Parathion, Mala- 
thon, Lindane, BHC, TEPP, 
Nicotine, Rotenone. 
DDT or Parathion. 
Parathion and DDT injure 
Kalanchoe and some other 
succulents. 
1 to 3 oz. per bushel of 
bulbs. 
Bulb disinfectants. 
DISEASE 
Stem rot 
Damping-off 
CONTROL MEASURE 
REMARKS 
Arasan, Fermate, 
or Parzate. 
Zerlate, 
Destroy diseased plants. 
Treat seeds, light covering 
only. Use 1 teaspoon per 
gal. and apply as a liquid 
fertilizer on soil in which 
plants are growing. 
Steam sterilize soil mixture 
and pots. 
Black spot 
Chrysanthemum 
English lvy 
Avoid injury to stems of 
seedlings or cuttings when 
potting or planting. Don't 
plant too deep! 
Fermate—1 Ib. per 100 
gal. plus a spreader. 
Avoid splashing water on 
foliage. Regular spraying 
necessary. 
Fermate, Zerlate, or Par- 
zate sprays. 
Avoid splashing foliage 
with water. 
Mildew Calendula 
Chrysanthemum 
Hydrangea 
Rose 
Saintpaulia 
Root rot 
Soft rot 
Avoid temperature drops 
which increase relative hu- 
midity and encourage 
growth of the mildew or- 
ganism. 
No fungicide effective if 
heat and ventilation are 
not regulated correctly. 
Mildex—6 oz. per 100 gal. 
plus a spreader. 
Apply when plants will dry 
rapidly. May cause spot- 
ting or crippling of foliage 
on some rose varieties. 
Wettable sulfur sprays plus 
a spreader or sulfur dusts. 
Often bleaches 
Parathion and 
gether cause 
roses. 
flowers. 
sulfur to- 
leafdrop on 
2 oz. wettable Spergon in 
1 gal. water. Soak 3 hours. 
1 Ib. New Improved Cer- 
esan per 50 gal. water. 
Soak 1 hour. 
Formaldehyde 1-50. Soak 
1 hour. 
——— 
Ee 
Dithion bomb or Malathon 
splay. 
Parathion bomb or spray. 
Dithion bomb or 
generator. 
smoke 
Apply regularly after young 
scale hatch and are in 
crawler stage. 
Not recommended on poin- 
settias showing color. 
Malathon spray. 
Ants 
Grasshoppers 
Slugs 
Snails 
Cutworms 
Sowbugs 
Chlordane dust or spray. 
Leafspots 
Foliage 
blights 
Aster 
Azalea 
Begonia 
Carnation 
Chrysanthemum 
Cyclamen 
English Ivy 
Gardenia 
Geranium 
Hydrangea 
Carnation 
Chrysanthemum 
Snapdragon 
Botrytis or 
petal blight 
Fermate, Zerlate, or Par- 
zate sprays or dusts. 
eq i. 
High humidity favors its 
development. Use some 
heat and ventilation even 
in mild weather. 
Remove all rotted portions 
before soaking. Steam soil 
and pots. Plant bulbs im- 
mediately after soaking 
treatment. 
Avoid splashing water on 
foliage. Give plenty of 
space and air. 
ui... 
Common on white or soft 
varieties of carnations and 4 
chrysanthemums. 
Parzate sprays or dusts. 
Apply when color shows. 
Aster 
Carnation 
Chrysanthemum 
Snapdragon 
Fermate, Zerlate, or 
zate sprays. 
Par- 
Wettable sulfur sprays. 
Avoid splashing water on a 
foliage. 
Snailicide. 
Snarol. 
Leafminer 
Foliar 
nematode 
Rose Midge 
Strawberry 
root worm 
Chrysanthemum 
DDT dust for sowbugs. 
Root 
nematode 
Any 
Steam soil, pots, and bench 
area where pots have been 
placed. 
Methyl bromide fumigation 
also very effective. 
Parathion spray. 
Sodium selenate. 
DDT sprayed on walks and 
benches three times at 
10-day intervals. 
Pinch and destroy heavily 
infested shoots. 
Chrysanthemum 
Discard all stock and buy 
stunt-free plants. 
Virus which is slow to 
show symptoms. Apparently 
healthy plants may have 
stunt. 
Parathion bomb. 
Begonia 
Cyclamen 
English lvy 
Saintpaulia 
Snapdragon 
Foliage plants 
Parathion spray. 
Dimite spray. 
Useful only when pests are 
on the foliage. 
Repeated applications nec- 
essary. Usually injures cy- 
clamen. 
Rotenone & nicotine spray. 
Must spray every 5 to 7 
days. 
Root aphids 
Fern 
Palm 
Poinsettia 
Lindane—use 1 oz. of 
wettable powder per 30 
gal. and apply as a liquid 
fertilizer. 
Symphylids 
Any 
Lindane—see Root aphids. 
Yearly treatment advised. 
Azalea 
Gardenia 
Hydrangea 
Chlorosis 
Chrysanthemum 
Snapdragon 
Re-establish root action by 
carrying on the dry side. 
Sequestrene at 1 teaspoon 
per 2 gal. water. Iron 
sulfate at 1 oz. per 2 gal. 
Often caused by too much 
fertilizer. Leach thoroughly. 
May be caused by high pH, 
over-watering, root nema- 
todes, or symphylids. 
Have soil 
cally. 
tested periodi- 
Mosaic Any 
Destroy badly infected 
plants. 
Compiled by 
OHIO FLORISTS’ 
Often spread by aphids. 
Keep them under control. 
ASSOCIATION 
