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Potential of Gas-Propelled Aerosol Containing Synergized Pyrethrins for Localized Treatment of Cryptotermes brevis (Kalotermitidae: Blattodea)

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Hassan, B. and Fitzgerald, C. J. (2023) Potential of Gas-Propelled Aerosol Containing Synergized Pyrethrins for Localized Treatment of Cryptotermes brevis (Kalotermitidae: Blattodea). Insects, 14 (6). p. 522. ISSN 2075-4450


Article Link: https://doi.org/10.3390/insects14060522

Publisher URL: https://www.mdpi.com/2075-4450/14/6/522


The possibility of synergized pyrethrin-containing aerosol as a choice for spot-treating C. brevis in Australia was investigated in laboratory tests. Topical toxicity tests, where C. brevis pseudergates were subjected to multiple doses of pyrethrin mist insecticide, showed the concentration-dependent death of termites with a median lethal dose (LD50) of 193.16 µg. Residual toxicity tests, where the termites were exposed to wood surfaces treated with pyrethrin-containing aerosol, showed a rapid mortality in short and continuous exposures. Less than 20% of the termites survived even when the termites were exposed to a treated wood surface for a minute. All the termites died within 1–5 h in continuous exposure tests, depending on the age of the treated surface. In repellency tests, the termites tended to visit treated surfaces, causing an overall lower survival of the termites. The synergized pyrethrin-containing aerosol remained insufficiently volatile to produce the complete mortality of the termites even after 196 h when there was no contact with a treated surface. The number of termites that survived following the application of the synergized aerosol through a simulated wood gallery or silicon tubing with fecal pellets was also negligible, demonstrating the ability of the aerosol to penetrate through pellets and ultimately resulting in a distribution that is ideal for treatment in the termite galleries.

Item Type:Article
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Horticulture and Forestry Science
Keywords:drywood termites; pyrethrin; PY mist; topical bioassay; residual toxicity; spot treatment
Subjects:Science > Entomology
Science > Zoology > Invertebrates > Insects
Plant pests and diseases
Forestry > Research. Experimentation
Live Archive:22 Jun 2023 04:11
Last Modified:22 Jun 2023 04:11

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