Description:
Adult insects are yellow, tan or black
Detection:
They suck plant juices from the leaves, causing
pale spots. In a severe
infestation the leaves
turn yellow and die. These
pests thrive in
hot, dry conditions.
Control:
a) If small number of plants are affected;
Minor infestations can
be taken care of by
a forceful spray of water.
Effective pesticides
include a Pyrethrum solution
or tobacco steeped
in water. Try this solution
on only a few
leaves first to ensure
that it is not to
strong and reduce the concentration
if the
foliage is affected. Repeat
treatment in
a few days to insure success.
A systemic
pesticide can also be used.
b) If large number of plants is affected:
OPTION 1:Non Chemical management:
- Diatomaceous earth sprinkled on buds and
on ground around plants
may help control
thrips. Do not inhale
dust or get it in eyes,
as it can be irritating.
- Encourage natural predators such as ladybird
beetle larvae and lacewing
larvae which help
control thrips populations.
- Remove debris from around plants in fall
to reduce numbers of
overwintering adults.
-
OPTION 2: Chemical management:
Thrips are difficult to control. Spray directly
into the flower bud or
flower. Test a bud
or flower to see if the
chemical can be tolerated.
- Lilly Miller Bug-Off Rose & Flower Spray
(RTU)
- Lilly Miller Diazinon Insect Spray
- Lilly Miller Feed & Shield Systemic Rose
Care 6-10-4
- Ortho Isotox Insect Killer Formula IV
- Ortho Orthene Systemic Insect Control Concentrate
- Ortho RosePride Orthenex Insect & Disease
Control 1
- Safer Insecticidal Soap Concentrate
- This list may not include all products registered
for this use.
Active ingredient table for the above listed
products:
| Product |
Active Ingredient |
EPA |
| Lilly Miller Bug-Off Rose & Flower Spray
(RTU) |
pyrethrins |
802-593 |
| Lilly Miller Diazinon Insect Spray |
diazinon |
802-444 |
| Lilly Miller Feed & Shield Systemic Rose
Care 6-10-4 |
disulfoton |
802-426 |
| Ortho Isotox Insect Killer Formula IV |
acephate, fenbutatin-oxide |
239-2595 |
| Ortho Orthene Systemic Insect Control Concentrate |
acephate |
239-2461 |
| Ortho RosePride Orthenex Insect & Disease
Control 1 |
acephate, resmethrin, triforine |
239-2476 |
| Safer Insecticidal Soap Concentrate |
potassium salts of fatty acids |
42697-1 |
