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Toxicity And Behavioral Effects Of Nootkatone, 1,10-Dihydronootkatone, And Tetrahydronootkatone To The Formosan Subterranean Termite (Isoptera: Rhinotermitidae), Sanaa A. Ibrahim, Gregg Henderson, Betty C.R. Zhu, Huixin Fei, Roger A. Laine
Toxicity And Behavioral Effects Of Nootkatone, 1,10-Dihydronootkatone, And Tetrahydronootkatone To The Formosan Subterranean Termite (Isoptera: Rhinotermitidae), Sanaa A. Ibrahim, Gregg Henderson, Betty C.R. Zhu, Huixin Fei, Roger A. Laine
Faculty Publications
Toxicity and behavioral effects of nootkatone and two of its derivatives, 1,10-dihydronootkatone and tetrahydronootkatone, to Coptotermes formosanus Shiraki were investigated on workers from two different colonies by using topical application assays, repellency assays, and sand barrier assays. The acute toxicity of the nootkatones on workers from both colonies increased as the saturation of the molecule increased, but the difference was significant for only one colony. The results of the repellency assays showed a similar trend of efficiency; the threshold concentration for significant repellency was four-fold higher in nootkatone treatments (50 ppm) than in the reduced derivatives 1,10-dihydronootkatone or tetrahydronootkatone (12.5 …
Volatiles Associated With Formosan Subterranean Termites And Related Methods Development, Paul Mclaughlin
Volatiles Associated With Formosan Subterranean Termites And Related Methods Development, Paul Mclaughlin
LSU Master's Theses
An investigation was conducted to identify volatiles associated with active Formosan termites. Using a combined technique of short path thermal desorption-gas chromatography/mass spectrometry (SPTD-GC/MS), qualitative comparisons were made between compounds detected in treatments containing active Formosan termites versus those detected in controls without Formosan termites. Except for dimethyl disulfide, none of the compounds were consistently detected in the treatments but not the controls for the four termite groups tested. However, in each of the three groups that dimethyl disulfide was detected, dead termites that were decomposing along with active termites were present. Therefore, none of the compounds could be classified …
Durability Of Pine Strandboard Modified With Low Molecular Weight Phenol Formaldehyde, Matthew Daniel Voitier
Durability Of Pine Strandboard Modified With Low Molecular Weight Phenol Formaldehyde, Matthew Daniel Voitier
LSU Master's Theses
A continuing challenge for wood and wood-based composite building materials has been durability--the power of resisting agents or influences which tend to cause changes, decay, or dissolution; lastingness. In the case of wood-based products, this often requires a resistance to biological degradation and moisture related dimensional instability (particularly in particle and flake or strand boards). Borden Chemical Company has developed a new low molecular weight phenol formaldehyde additive, PD-112, to improve durability in composite wood products. This study investigated PD-112’s contribution to durability in oriented strand board (OSB) through laboratory testing of treated southern pine strandboard panels versus untreated control …