Material properties determining the insecticidal activity of highly divided porous materials on the pharaoh ant (Monomorium pharaonis). Issue 6 (8th February 2018)

• Record Type: Journal Article
• Authors: Van Den Noortgate, Heleen; Lagrain, Bert; Pulinthanathu Sree, Sreeprasanth; Kerkhofs, Stef; Wenseleers, Tom; Martens, Johan A
• Is Part Of: Pest management science. Volume 74:Issue 6(2018)
• Page Start: 1374
• Page End: 1385
• Publication Date: 2018-02-08
• Subjects: pest management -- zeolites -- activated carbon -- desiccant powders -- wax adsorbents -- pharaoh ants; Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.4814
• Languages: English
• ISSNs: 1526-498X

Abstract

Abstract: BACKGROUND: Historically, inert insecticidal powders such as diatomaceous earth were researched for pest management applications, and it was revealed that these types of powders killed insects by desiccation. However, data on the critical material properties that affect their efficacy are sparse. The present study investigated the insecticidal effect of powdered materials on the pharaoh ant, a notorious domestic pest. RESULTS: The insecticidal activity of 24 porous materials was tested. Eight of these materials performed better than the benchmark, diatomaceous earth. Zeolite Y and carbon black II performed best, inducing 50% mortality within 40 and 55 minutes, respectively. Statistical analysis of seven material properties revealed that macroporous surface area and Brunauer–Emmett–Teller (BET) specific surface area were most predictive of insecticidal activity. For zeolites and ordered mesoporous silica materials, the most important parameters were, respectively, BET and large mesopore surface area. Finally, gas chromatography–mass spectrometry (GC–MS) analysis confirmed the adsorption of epicuticular hydrocarbons onto the zeolite powders. CONCLUSION: This study shows clear potential for the use of environmentally friendly, inert porous materials as insecticides against the pharaoh ant and identified the key material properties influencing insecticidal activity. The GC–MS data support the hypothesis that the mortality was caused by the removal of the protective epicuticular hydrocarbons. © 2017 Society of Chemical Industry Abstract : Catering to the growing demand for less toxic and more environmentally friendly insecticides, this study investigates the insecticidal effect of inert materials on the pharaoh ant, a notorious domestic pest.