Treatment of timber with permethrin in supercritical carbon dioxide to control termites

Cookson, L.J.; Qader, Abdul; Creffield, J. W.; Scown, D. K.

doi:10.1016/j.supflu.2009.03.002

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…However, due to its toxicity and deterrence in feeding, menadione can potentially be used for protection of interior wood and wood products. Some repellent termiticides, such as bifenthrin and permethrin, have been effectively used as wood preservatives under different settings [51][52][53][54]. The dose responses of different termite species, including subterranean and drywood termites, to various wood types treated with menadione warrant further investigation.…”

Section: Discussionmentioning

confidence: 99%

Effects of Menadione on Survival, Feeding, and Tunneling Activity of the Formosan Subterranean Termite

Ngo

Castillo

Laine

et al. 2021

Insects

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The Formosan subterranean termite, Coptotermes formosanus Shiraki, is a highly destructive pest and a cosmopolitan invasive species. Sustainable termite management methods have been improving with the search for novel insecticides that are effective, safe, and cost efficient. Menadione, also known as vitamin K3, is a synthetic analogue and biosynthetic precursor of vitamin K with low mammalian toxicity. Menadione has shown insecticidal activity in several insects, presumably due to interference with mitochondrial oxidative phosphorylation. However, little is known about its effectiveness against termites. In this study, we evaluated the toxicity and repellency of menadione in C. formosanus. Our results showed that menadione affected the survival and feeding activity of termites both in filter paper and substrate (sand) treatments, and menadione influenced termite tunneling activity in treated sand. In a no-choice assay, ≥90% mortality after seven days and minimal or no food consumption were recorded when sand was treated with menadione at 6 to 600 ppm. In a two-choice assay with a combination of treated and untreated sand, termites were deterred by menadione at 6 to 600 ppm and exhibited low mortality (≤30%) over seven days, while tunneling activity was prevented with 60 to 600 ppm of menadione treatment. Overall, our study demonstrated dose-dependent toxicity and repellency of menadione in C. formosanus. The potential use of menadione as an alternative termite control agent is discussed.

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Section: Discussionmentioning

confidence: 99%

Effects of Menadione on Survival, Feeding, and Tunneling Activity of the Formosan Subterranean Termite

Ngo

Castillo

Laine

et al. 2021

Insects

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“…Anderson et al (2000) explored the effects of treatment on flexural properties of white oak and sweetgum beams. Cookson (2009) reported on small-scale treatments of Australian hardwoods with permethrin for termite control, but the work was not commercialized. One major hurdle to the commercial use of SCFs is the large capital investment required for the treatment plant; however, the operating costs can be lower than regular treatment facilities and the ability to effectively impregnate species that are not currently suitable for exterior exposure creates a range of new market opportunities.…”

Section: Introductionmentioning

confidence: 99%

Preservative Treatment of Tasmanian Plantation Eucalyptus Nitens Using Supercritical Fluids

Wood

Kjellow²,

Konkler³

et al. 2023

WFS

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“…Carbon dioxide has many excellent properties in the supercritical state, e.g., a large diffusion coefficient, low viscosity, and no surface tension. Properties such as the solubility and dielectric constant can be rapidly changed with the adjustment of the pressure, and it has strong penetration and swelling capacity for natural polymers and synthetic polymers, as well as having antiseptic properties (Matsunaga et al 2005;Cookson et al 2009). Supercritical carbon dioxide is also an excellent heat transfer fluid, which is beneficial to speed up the heat transfer process in the drying process and improve the drying efficiency (Cabeza et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Analysis on the diffusion and mechanical properties of eucalyptus dried via supercritical carbon dioxide

Cao

Wang

2022

BioRes

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Using the molecular dynamics software Materials Studio, a micro-level carbon dioxide – cellulose model was established to study the supercritical carbon dioxide drying of eucalyptus wood. The change of the primary components of the eucalyptus wood cellulose were also studied, by simulating various pressures, i.e., 10, 15, 20, 25, and 30 Pa, and simulating a temperature of 323 K. Results showed that the diffusion coefficient of carbon dioxide decreases as the pressure increases, and it reaches the maximum at 20 Pa, which was confirmed by the number of hydrogen bonds in the carbon dioxide cellulose model. Combined with the comprehensive analysis of the mechanical parameters, the Poisson’s ratio γ and the ratio of bulk modulus to shear modulus (K/G) values of cellulose first increased and then decreased as the pressure increased, and the Young’s modulus increased as the pressure increased. From a microscopic point of view, the study shows that eucalyptus cellulose has good mechanical properties when dried by supercritical carbon dioxide under a pressure of 20 Pa. The simulation results of the dynamic model agreed well with the measured results, and the simulation results support the previous experimental data and the practical application results in production.

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Treatment of timber with permethrin in supercritical carbon dioxide to control termites

Cited by 10 publications

References 6 publications

Effects of Menadione on Survival, Feeding, and Tunneling Activity of the Formosan Subterranean Termite

Effects of Menadione on Survival, Feeding, and Tunneling Activity of the Formosan Subterranean Termite

Preservative Treatment of Tasmanian Plantation Eucalyptus Nitens Using Supercritical Fluids

Analysis on the diffusion and mechanical properties of eucalyptus dried via supercritical carbon dioxide

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