Product Studies

Test on Fire Ants – University of Hawaii, Sept. 2013

From: Cas Vanderwoude
Subject: RE: Cedar oil
Date: September 9, 2013 10:10:59 AM HST

I performed 2 basic tests for proof of concept as follows:

Test 1. Placed a piece of spam (as an attractant) in a location where ants were foraging. After 1 hour exposure, the ants had recruited to the spam. Then sprayed 1 square foot of bitumen around the bait with 4 sprays of the sprayer supplied. I placed a new of spam in the center of the sprayed area. No ants had recruited to the spam after 1 hour. The following day, 24 hours later, I placed a fresh piece of spam in the same location. After 1 hour exposure, ants were recruiting to the spam as they were prior to spraying the cedar oil.

Test 2. This was a repeat of test 1. However, the entire contents of the supplied cedar oil sample were used. Each day, I placed a new piece of spam in the same location and monitored recruitment. This treatment repelled foraging ants for 2 days. By the third day, ant began recruiting to the bait and readily crossed the treated area. On the fourth day, recruitment was entirely normal.

Conclusion. The cedar oil sample as supplied, repelled foraging ants for up to 3 days after application of 2-3 oz per square ft. This would be equivalent to using approximately 2 gallons of cedar oil around an average medium sized home. Effective continued repellency would require repeat applications every 3 days.



Cas Vanderwoude
Hawai`i Ant Lab, Pacific Cooperative Studies Unit,
University of Hawaii
16 E. Lanikaula St Hilo, Hawaii USA. 96720



Monday August 17 2009 - By Rutgers University 
Cedar Oil is advertised as a safe, effective insecticide for controlling a variety of public health pests including Bed Bugs. Bed Bug Central and Rutgers University have partnered to put a variety of Bed Bug products to the test. Cedar oil is the first in the series. “Cedar Oil Blend” Cedar oil was chosen due to the claims being made by the manufacture, to the public for use in controlling bed bugs.

Bed Bug Central funded Rutgers University’s, Dr. Changlu Wang to conduct research that examined the effectiveness of “Cedar Oil Blend” cedar oil. The research examined the effectiveness of the cedar oil product on both bugs and eggs that were treated directly with the product as well as the residual effectiveness of the product once dry. This is a brief summary of the research findings.

The product tested was, “Cedar Oil Blend” cedar oil. “Cedar Oil Blend” is a category 25b EPA exempt product that contains 10% cedar oil and 90% latex. The bed bugs used in this research were from a field collected strain.

The direct spray of “Cedar Oil Blend” caused immediate immobilization of the bed bug nymphs, followed by 100% mortality within 1 minute of the topical application. In addition to being 100% effective on bugs directly treated with the product, it also proved to be effective against eggs that were directly treated. None of the 61 treated eggs hatched after 17 days compared to 75% egg hatch in a non-treated control group

The Results showed that “Cedar Oil Blend” is highly effective against bed bugs including eggs when applied directly. We were quite surprised with the findings of this study, particularly when it came to the eggs. This prompted some additional investigation into the effectiveness of the two constituent materials, cedar oil (10%) and latex (90%). No mortality was observed when either generic cedar oil or latex were directly applied to bed bugs. This clearly raises some interesting questions regarding the effectiveness of the “Cedar Oil Blend” cedar oil product. The fact that the each of the constituent ingredients are ineffective when tested alone suggests that there is something unique about the type of cedar oil or latex used by the manufacturer or that there is something about the formulation process that gives the “Cedar Oil Blend” product it’s insecticidal activity.