Translator Disclaimer
1 August 2008 Toxicity of Fatty Acid Salts to German and American Cockroaches
Author Affiliations +
Abstract

The toxicity of fatty acid salts to German, Blattella germanica (L.), and American cockroaches, Periplaneta americana (L.), was evaluated. Potassium and sodium laurate caused up to 95% mortality of German cockroaches and 100% mortality of American cockroaches. Even-numbered potassium fatty acid salts, C8–C18, were assessed for toxicity at 0.125, 0.25, 0.5, 1, and 2% concentrations by a 30-s immersion of cockroaches. The more soluble of the fatty acid salts at 2% concentration caused 65–95% mortality of German cockroaches and 100% mortality of American cockroaches. Potassium oleate, C18, was most toxic to both German (LC50 = 0.36%) and American (LC50 = 0.17%) cockroaches. Fatty acid salt solutions on a substrate were tested by placing cockroaches in contact with treated floor tiles immediately after application (wet) or after the solutions had dried. Sodium laurate and potassium caprate caused mortality of German (62 ± 17.4 and 58 ± 12.6%, respectively) and American cockroaches (52 ± 18.5 and 28 ± 4.9%, respectively) on wet tiles, whereas potassium oleate caused mortality of German cockroaches (67 ± 14.1%) only. Dry fatty acids caused no mortality among exposed cockroaches. Fatty acid salt solutions can be effective in killing German and American cockroaches but only when insects are thoroughly wetted with 1–2% fatty acid salt solutions.

R. W. Baldwin, P. G. Koehler, and R. M. Pereira "Toxicity of Fatty Acid Salts to German and American Cockroaches," Journal of Economic Entomology 101(4), 1384-1388, (1 August 2008). https://doi.org/10.1603/0022-0493(2008)101[1384:TOFAST]2.0.CO;2
Received: 10 April 2007; Accepted: 6 April 2008; Published: 1 August 2008
JOURNAL ARTICLE
5 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top