Barrier Strip and Pre-Flood Treatments with DDT to Control Anopheles quadrimaculatus

Ludvik, G. F.

doi:10.1093/jee/43.4.516

Cited by 14 publications

(11 citation statements)

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“…Several published studies have assessed the duration and magnitude of the residual insecticidal effects of insecticide mists applied to outdoor vegetation, and the subsequent impact on wild mosquito populations. Outcome measures included mosquito biting rate or abundance (assessed with human-landing catch and light traps respectively), oviposition [ 20 , 21 ], recapture rate in mark-released experiments [ 22 ] and mortality of laboratory-adapted or wild female imagoes exposed to extemporaneously collected insecticide-treated plant material [ 21 , 23 , 24 ]. Both failure and success were reported with effects lasting from days to months.…”

Section: Introductionmentioning

confidence: 99%

“…Most studies were conducted in North America and only three were for malaria vector-control in endemic areas [ 22 , 25 , 26 ]. After the studies on DDT in the 1940s [ 22 , 25 , 27 ], synthetic pyrethroids such as permethrin, deltamethrin, lambda-cyhalothrin and bifenthrin were preferred to other insecticide classes for their rapid knockdown effect and better toxicity profile [ 21 , 23 , 24 , 28 , 29 ]. ORS was carried out in a variety of settings ranging from urban backyards to hectares of jungle bush using backpack mist blowers, truck-mounted sprayers or aircrafts.…”

Section: Introductionmentioning

confidence: 99%

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Impact of outdoor residual spraying on the biting rate of malaria vectors: A pilot study in four villages in Kayin state, Myanmar

et al. 2020

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Outdoor and early mosquito biters challenge the efficacy of bed-nets and indoor residual spraying on the Thailand-Myanmar border. Outdoor residual spraying is proposed for the control of exophilic mosquito species. The objective of this study was to assess the impact of outdoor residual spraying on the biting rate of malaria vectors in Kayin state, Myanmar. Outdoor residual spraying using lambda-cyhalothrin was carried out in two villages in December 2016 (beginning of the dry season) and two villages were used as a control. Malaria mosquitoes were captured at baseline and monthly for four months after the intervention using human-landing catch and cow-baited trap collection methods. The impact of outdoor residual spraying on human-biting rate was estimated with propensity score adjusted generalized linear mixed-effect regressions. At baseline, mean indoor and outdoor human-biting rate estimates ranged between 2.12 and 29.16 bites /person /night, and between 0.20 and 1.72 bites /person /night in the intervention and control villages respectively. Using model output, we estimated that human-biting rate was reduced by 91% (95%CI = 88–96, P <0.0001) immediately after outdoor residual spraying. Human-biting rate remained low in all sprayed villages for 3 months after the intervention. Malaria vector populations rose at month 4 in the intervention villages but not in the controls. This coincided with the expected end of insecticide mist residual effects, thereby suggesting that residual effects are important determinants of intervention outcome. We conclude that outdoor residual spraying with a capsule suspension of lambda-cyhalothrin rapidly reduced the biting rate malaria vectors in this area where pyrethroid resistance has been documented.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of outdoor residual spraying on the biting rate of malaria vectors: A pilot study in four villages in Kayin state, Myanmar

et al. 2020

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“…Examples of treated artificial perimeter substrates include interior and exterior walls (Huehne 1971, Lee et al 1997, suspended or spread sheets (Elnaiem et al 1999, Graham et al 2002, bed nets (Hill et al 2006), and livestock fencing (Bauer et al 2006a(Bauer et al , 2006b. A range of insecticides has been used, from DDT in early studies (Lindquist and McDuffie 1945, Trapido 1947, Ludvik 1950, Nair 1951 to various pyrethroids and other toxicants in more recent work (Sathantriphop 2006, Xue 2008. Experimental barrier treatments have mainly targeted mosquitoes, especially vectors of malaria (Yadav 2003, Diabate et al 2006) but have also been assayed against sand flies (Jacusiel 1947, Kelly et al 1997) and biting midges (Kettle 1949, Royal 2004.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Barrier Treatments on Native Vegetation in A Southern California Desert Habitat

Britch

Linthicum²,

Wynn³

et al. 2009

Journal of the American Mosquito Control Association

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Treating perimeters with residual insecticides for protection from mosquito vectors has shown promise. These barrier treatments are typically evaluated in temperate or tropical areas using abundant vegetation as a substrate. However, there is an emerging interest to develop this technology to protect deployed US troops in extreme desert environments with sparse vegetation. We used a remote desert area in the Coachella Valley, California, to 1) evaluate bifenthrin barrier treatments on native xeric vegetation and 2) compare treatments applied with electrostatic and conventional spray technologies. Through a combination of laboratory bioassays on treated and control vegetation sampled at specific intervals over 63 days, synchronized with field surveillance of mosquitoes, we measured the temporal pattern of bioactivity of bifenthrin barriers under natural hot, dry, and dusty desert conditions. Regardless of spray technology, mosquito catch in treated plots was about 80% lower than the catch in control plots 1 day after treatment. This reduction in mosquito numbers in treated plots declined each week after treatment but remained at about 40% lower than control plots after 28 days. Field data were corroborated by results from bioassays that showed significantly higher mosquito mortality on treated vegetation over controls out to 28 days postspray. We concluded that barrier treatments in desert environments, when implemented as part of a suite of integrated control measures, may offer a significant level of protection from mosquitoes for deployed troops. Given the comparable performance of the tested spray technologies, we discuss considerations for choosing a barrier treatment sprayer for military scenarios.

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“…Only 0.12% of these mosquitoes were recaptured within 8 weeks post treatment, leading investigators to conclude that the barrier treatment was successful. 10 A separate study 11 2 DDT resulted in 6 weeks of control and 4.5 kg/4047 m 2 DDT resulted in 9 weeks of control of Ae sollicitans and Ae taeniorhynchus. 13 In concurrent tests of BHC, lindane, and dieldrin in these residential settings, control lasted only from 0 to 2 weeks.…”

Section: Pyrethrum Dichlorodiphenyltrichloroethane and Organochlorinesmentioning

confidence: 97%

“…7 Dichlorodiphenyltrichloroethane barrier treatments indicated that the flight range of the targeted mosquito species must be considered to help determine the appropriate height and depth of barrier treatments. 10 To test this, Ludvik 10 carried out a study in Alabama, where the formulation included 25% DDT, 63% xylene, 2% emulsifier, and 10% rosin (1:4 ratio; formulation: Stoops et al 3 Table 1. Summary of active ingredients and products evaluated in laboratory, semi-field, field barrier spray studies.…”

Section: Pyrethrum Dichlorodiphenyltrichloroethane and Organochlorinesmentioning

confidence: 99%

A Review of Studies Evaluating Insecticide Barrier Treatments for Mosquito Control From 1944 to 2018

Stoops¹,

Qualls

Nguyen

et al. 2019

Environ�Health�Insights

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Background and Purpose: Barrier insecticide treatments have a long history in mosquito control programs but have been used more frequently in the United States in recent years for control of invasive “backyard” species (eg, Aedes albopictus) and increases in incidence of vector-borne diseases (eg, Zika). Methods: We reviewed the published literature for studies investigating barrier treatments for mosquito control during the last 74 years (1944-2018). We searched databases such as PubMed, Web of Science, and Google Scholar to retrieve worldwide literature on barrier treatments. Results: Forty-four studies that evaluated 20 active ingredients (AIs) and 21 formulated products against multiple mosquito species are included. Insecticides investigated for efficacy included organochlorines (dichlorodiphenyltrichloroethane [DDT], β-hexachlorocyclohexane [BHC]), organophosphates (malathion), and pyrethroids (bifenthrin, deltamethrin, permethrin, lambda-cyhalothrin) as AIs. Study design varied with multiple methods used to evaluate effectiveness of barrier treatments. Barrier treatments were effective at lowering mosquito populations although there was variation between studies and for different mosquito species. Factors other than AI, such as exposure to rainfall and application equipment used, also influenced control efficacy. Conclusions: Many of the basic questions on the effectiveness of barrier insecticide applications have been answered, but several important details still must be investigated to improve precision and impact on vector-borne pathogen transmission. Recommendations are made to assist future evaluations of barrier treatments for mosquito control and to limit the potential development of insecticide resistance.

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Barrier Strip and Pre-Flood Treatments with DDT to Control Anopheles quadrimaculatus

Cited by 14 publications

References 0 publications

Impact of outdoor residual spraying on the biting rate of malaria vectors: A pilot study in four villages in Kayin state, Myanmar

Impact of outdoor residual spraying on the biting rate of malaria vectors: A pilot study in four villages in Kayin state, Myanmar

Evaluation of Barrier Treatments on Native Vegetation in A Southern California Desert Habitat

A Review of Studies Evaluating Insecticide Barrier Treatments for Mosquito Control From 1944 to 2018

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