Initial and Residual Activity of VectoBac® 12 AS, VectoBac® WDG, and VectoLex® WDG for Control of Mosquitoes in Ararat Valley, Turkey

Aldemır, Adnan

doi:10.2987/08-5836.1

Cited by 14 publications

(11 citation statements)

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“…Several studies demonstrated that mosquito larvae reduce foraging behavior, resulting in lower feeding rates when cues of predators were present (Juliano and Reminger , Juliano and Gravel , Kesavaraju and Juliano ). The additive stress caused by predators and competitors results in higher vulnerability of mosquito larvae to toxicant exposure (Beketov and Liess ). In addition, inhibition of recolonization by Cx.…”

Section: Discussionmentioning

confidence: 99%

“…This insecticide is considered to target larval mosquitoes (Culicidae) and non‐biting midges (Chironomidae) specifically, and thus avoids adverse effects on other species (Boisvert and Boisvert , Becker , Russell et al ). However, a disadvantage of the use of Bti is that it remains effective for only a few days owing to sedimentation and natural degradation (Becker et al , Aldemir ). This necessitates the repeated application of Bti during each mosquito breeding season, which is expensive and promotes the emergence of resistance (Boyer et al ).…”

Section: Introductionmentioning

confidence: 99%

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Crustacean biodiversity as an important factor for mosquito larval control

Kroeger

Duquesne

Liess

2013

Journal of Vector Ecology

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Newly established ponds, which are highly dynamic systems with changing levels of biological interactions among species, are common larval mosquito habitats. We investigated the impact of crustacean abundance and taxa diversity on mosquito oviposition and larval development. The effects of the biological larvicide Bacillus thuringiensis israelensis (Bti) on mosquito larvae were monitored according to fluctuations in crustacean communities. Populations of the mosquito Culex pipiens colonized artificial ponds that contained crustacean communities at different time points of colonization by crustaceans: 1) 'no colonization' (no crustaceans), 2) 'simultaneous colonization' by crustaceans and mosquitoes, and 3) 'head-start colonization' by crustaceans (preceding colonization by mosquitoes). All types of ponds were treated with three concentrations of Bti (10, 100, or 1,000 µg/liter). Colonization of all ponds by Cx. pipiens (in terms of oviposition, larval abundance, and larval development) decreased significantly with increasing diversity of crustacean taxa. The total abundance of crustaceans had a minor effect on colonization by Cx. pipiens. The presence of crustaceans increased the sensitivity of Cx. pipiens larvae to Bti treatment by a factor of 10 and delayed the time of recolonization. This effect of Bti was relevant in the short term. In the long term, the presence of Cx. pipiens was determined by crustacean biodiversity.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Crustacean biodiversity as an important factor for mosquito larval control

Kroeger

Duquesne

Liess

2013

Journal of Vector Ecology

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“…It has been observed that slow release formulations based on B. thuringiensis subsp. israelensis persist for a longer period of time (Gunasekaran et al 2002;Mulla et al 2004;Aldemir 2009). It is known that the persistence of a product depends on the characteristics of its formulation.…”

Section: Discussionmentioning

confidence: 97%

“…israelensis and have been produced in many countries such as USA, UK, India, Peru, Brazil, Egypt, Russia, China, and Israel (Becker and Margalit 1993;Pontes et al 2010). Few formulations of B. sphaericus are available and tested under field conditions and found to be effective (Karch et al 1991;Skovmand and Sanogo 1999;Medeiros et al 2005;Su 2008;Rydzanicz et al 2009;Aldemir 2009). However, inactivation of the insecticidal toxins by UV radiation and rapid settling, prevent sustained availability to larval feeding zone (Mulligan et al 1980;Lacey et al 1984;Melo-Santos et al 2001;Gunasekaran et al 2002).…”

Section: Introductionmentioning

confidence: 97%

Sustained-release biopolymer based formulations for Bacillus sphaericus Neide ISPC-8

et al. 2011

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Sustained-release biopolymer based formulations for an indigenous Bacillus sphaericus Neide ISPC-8 strain were developed and evaluated under laboratory conditions. These formulations were assessed for residual activity, response to UV-B radiation and shelf-life. The mosquitocidal activity of tested formulations showed a varied residual activity pattern against Culex quinquefasciatus Say larvae. The residual activity of unformulated spore-crystal suspension drastically decreased after 4 days whereas the formulated preparations persisted until 28 days. All the formulations except sodium alginate-based formulation showed more than 95% mortality within 48 h. Although the sodium alginate-based formulation showed delayed initial mortality, it persisted for a longer period of time (42 days). Based on the persistence studies, promising formulations based on sodium alginate, gelatin and acacia gum were selected for further evaluation. The respective LC 50 values of these three formulations were 0.085, 0.117, and 0.196 mg/l against C. quinquefasciatus after 48 h. The biopolymers combined with Congo red protected the sporecrystal moiety from UV-B radiation. These formulations were found to be stable up to 18 months when stored at room temperature. Thus, these biopolymers could serve as suitable ingredients for development of biopesticide based on B. sphaericus ISPC-8.

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“…Silva et al (2014) observed that the persistence of both Bti formulations was affected by exposure to sun. Although the susceptibility of Bti to the sun is well documented (Myasnik et al 2001, Vilarinhos and Monnerat 2004, Lima et al 2005, Delgado Puchi 2007, Aldemir 2009), there is little information on the mechanism involved in the inactivation of Bti by solar radiation (Delgado Puchi 2007). Pusztai et al (1991) observed in a detailed study that solar radiation destroyed the tryptophan of the crystals and under these conditions almost total loss of pathogenic activity occurs.…”

Section: Type Of Larvicidementioning

confidence: 99%

Evaluation of the Persistence of Three Larvicides Used To Control Aedes aegypti In Arapiraca, Northeastern Brazil

Amorim

Bauzer

Braga

et al. 2019

Journal of the American Mosquito Control Association

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The chemical control of the mosquito Aedes aegypti is a great challenge worldwide, since several populations of this species are already resistant to traditional insecticides, such as temephos. In Brazil, alternative larvicides, such as Bacillus thuringiensis israelensis ( Bti) and pyriproxyfen, have been used more recently. In this study we evaluated the persistence of pyriproxyfen (Sumilarv 0.5%G), 2 commercial formulations of Bti (Vectobac WDG and Vectobac G), and temephos (Fersol 1G) under field and simulated field conditions with treatments exposed to sun and shadow. In the field tests, the 2 formulations of Bti presented less persistence in the 8th wk of evaluation (46% and 37% positivity) compared with temephos (3.6% and 6.8% positivity) and Sumilarv (6.6% and 3.8% positivity) in containers exposed to the sun and shadow, respectively. In the simulated field trial, temephos and the 2 formulations of Bti presented high persistence (100% mortality at 8th wk) when applied in the water box and in deposits placed in the shade. In containers exposed to the sun, the persistence of these products was lower (>80% mortality by temephos after 4 wk, Bti formulations for 3 wk, and Sumilarv for 6 wk). Based on these data, however, Sumilarv presented better performance in the containers exposed to the sun than the 2 formulations of Bti (Vectobac G and Vectobac WDG), which were affected by the sun.

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Initial and Residual Activity of VectoBac® 12 AS, VectoBac® WDG, and VectoLex® WDG for Control of Mosquitoes in Ararat Valley, Turkey

Cited by 14 publications

References 0 publications

Crustacean biodiversity as an important factor for mosquito larval control

Crustacean biodiversity as an important factor for mosquito larval control

Sustained-release biopolymer based formulations for Bacillus sphaericus Neide ISPC-8

Evaluation of the Persistence of Three Larvicides Used To Control Aedes aegypti In Arapiraca, Northeastern Brazil

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