Comparison of insecticidal paint and deltamethrin againstTriatoma infestans(Hemiptera: Reduviidae) feeding and mortality in simulated natural conditions

Abstract

The Chagas disease vector Triatoma infestans is largely controlled by the household application of pyrethroid insecticides. Because effective, large-scale insecticide application is costly and necessitates numerous trained personnel, alternative control techniques are badly needed. We compared the residual effect of organophosphate-based insecticidal paint (Inesfly 5A IGR™ (I5A)) to standard deltamethrin, and a negative control, against T. infestans in a simulated natural environment. We evaluated mortality, knockdown, and ability to take a blood meal among fifth instar nymphs. I5A paint caused significantly greater mortality at time points up to 9 months compared to deltamethrin (Fisher's Exact Test, p < 0.01 in all instances). A year following application mortality among nymphs in the I5A was similar to those in the deltamethrin (χ2 = 0.76, df=1, p < 0.76). At months 0 and 1 after application, fewer nymphs exposed to deltamethrin took a blood meal compared to insects exposed to paint (Fisher's Exact Tests, p < 0.01 and p < 0.01 respectively). Insecticidal paint may provide an easily-applied means of protection against Chagas disease vectors.

Insecticide-treated durable wall lining (ITWL): future prospects for control of malaria and other vector-borne diseases

“…Despite achieving substantial reductions in disease incidence through historic large-scale trans-national IRS campaigns, active transmission persists, particularly in the Gran Chaco, where rapid domestic re-infestation abounds and insecticide resistance is increasing; both of which are exacerbated by decentralized regional control efforts in areas of recurrent political, social and economic instability [ 72 ]. While ITWL has yet to be directly evaluated against Chagas disease, organophosphate and juvenile growth hormone containing insecticidal vinyl paints (Inesfly 5A IGR ® ), based on similar principles to ITWL, have thus far reported encouraging experimental results [ 73 , 74 ] and long-term reductions in levels of household triatomine infestation [ 75 , 76 ].…”

Pilot study on the combination of an organophosphate-based insecticide paint and pyrethroid-treated long lasting nets against pyrethroid resistant malaria vectors in Burkina Faso

“…Toxicology studies performed so far support the paint's safety (Spanish Ministry of Health and Consumer Affairs (SMHCA), 1996;International Center of Training and Medical Investigations (ICTM), 2003;National Center of Tropical Diseases, 2004). Inesfly 5A IGR TM has been evaluated previously under experimental conditions in South America against the Chagas disease vector Triatoma infestans (Dias and Jemmio, 2008;Amelotti et al, 2009;Maloney et al, 2013).…”

Pesticidal Paints: An Integral Approach to Colour your Imagination

“…The organophosphateand pyrethroid-based insecticidal paints showed a very long residual activity, compared with the traditional spraying technique used for the application of pyrethroid insecticides in peridomestic structures of rural houses. 12 The application of the paints by trained personnel of the vector control programmes could be considered as an alternative control tool in areas where the traditional methods have failed or showed low efficacy. 13−15 …”