Pesticide Treatments for the Multicolored Asian Lady Beetle
that can be Applied to the Exterior of the Home
by a Pest Control Company
Efficacy and residual effect tests were conducted on some of the pyrethroid
pesticides (lambda-cyhalothrin, deltamethrin cyfluthrin, cypermethrin and bifenthrin)
to help homeowners with their choice of which chemical to use. During the test the
lady beetles were exposed at various time intervals to petri dish size white vinyl
siding disks that had been treated with the different insecticides. After 16-hours over
80% of the beetles were dead or dying in all the treatments. So all of these chemicals
give good immediate control. However, the results from the long-term efficacy test showed
some clear differences. After 78 hours the lambda-cyhalothrin and deltamethrin treatments
were the best with over 95% of the beetles either dead or dying. The bifenthrin treatment
was next with 84% and statistically the same as the deltamethrin treatment. Cyfluthrin and
cypermethrin killed only about 50% of the beetles at this time. So if your timing is good, that
is you get the pesticide on your home just before the beetles arrive all of the chemicals tested
should work well. However if you want to put a pesticide on early to make sure that you are
covered the chemicals lambda-cyhalothrin (can only be applied by a professional pest control
operator), deltamethrin and bifenthrin appear to be your best bet.
lambda-Cyhalothrin
Demand CS Insecticide
Deltamethrin
Suspend SC Insecticide
Bifenthrin
Talstar GC Flowable Insecticide/Miticide
Cypermethrin
Demon TC Insecticide
Cyfluthrin
Tempo 2 Insecticide
Tempo 20 WP Insecticide
Tempo SC Ultra
Tempo SC Ultra Premise Spray
Tralomethrin*
Stryker Insecticide
Scout X-tra Insecticide
*This chemical was not included in the efficacy and residual effect tests.
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