Development and Survival of Anopheline Immatures (Diptera: Culicidae) in Rice Fields in Northern Thailand1

Mogi, Motoyoshi; Okazawa, Takao; Miyagi, Ichiro; Sucharit, S; Tumrasvin, Watanasak; Deesin, T; Khamboonruang, Chirasak

doi:10.1093/jmedent/23.3.244

Cited by 32 publications

(21 citation statements)

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“…gambiae s.l. in borrowpits in Kenya (Service, 1971), 1-5 % for anophelines in Philippine rice fields , 0-6 % in Thailand rice fields (Mogi et al, 1986). In our study the high survival rate is possibly related to the absence of main predators such as larvivorous fishes, ordinary abundant in the market-garden wells of the Dakar area and very efficient in the control of immature mosquito populations (Robert et al, 1998).…”

Section: Discussionsupporting

confidence: 47%

Survival and emergence of immatureanopheles Arabiensismosquitoes in market-gardener wells in Dakar, Senegal

Awono-Ambene

Robert

1999

Parasite

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Summary :Anopheles arabiensis is the unique species of the An. gambiae complex observed in the wells dug by market-gardeners in the Dakar area. In order to relate the numbers of immature stages and emerging adults mosquitoes, population measurements were performed in eight wells in which An. arabiensis was the only mosquito species. Mean density of immature stages was measured using two sampling methods, the dipping with a tray by giving 50 dips in each well, and the quadrat with a frame on 2 or 3 m 2 in each well. The absolute number of emergent adults was obtained by collecting mosquitoes under net-trap covering entirely each wells.The dipping method was quicker and more operational than quadrat method. Density estimations of larvae at stage I to IV did not significantly differed using dipping or quadrat methods. On the contrary, pupal density was underestimated when measured by dipping. Mosquito nets placed over wells increased significantly emergence rale of adults, thus measurement of emerging mosquitoes was possible only the first day following the net putting up. The total number of immature stages in each well was significantly correlated with the number of emergent mosquitoes. The mean number of mosquitoes emerging daily from one well corresponded to 5 % of the total number of immature stages. Stage distribution for larvae I to IV and pupae, estimated by quadrat, was respectively 29 %, 28 %, 22 %, 16 % et 5 % (total = 100 %). Taking account the mean duration of various immature stages and the number of emerging mosquitoes by day, the equation of the survivorship curve from larval hatch (excluded) to emergence included was : y = 427.2 -136.8 log x. Therefore the mean mortality at immature stages was 80% i.e. an emerging rate of 20 %.The results of this study, associated with those of previous ones, permit to evaluate the average productivity of malaria vectors in market-gardener wells in the Dakar area.

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Section: Discussionsupporting

confidence: 47%

Survival and emergence of immatureanopheles Arabiensismosquitoes in market-gardener wells in Dakar, Senegal

Awono-Ambene

Robert

1999

Parasite

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“…These were found in the furrows and dug-out wells but not in the footprints. These insects have all been implicated as predators in larval breeding habitats [18,21,22]. Spiders were frequently encountered in the mud and vegetation at the edges of the larval habitats and on the water surface.…”

Section: Resultsmentioning

confidence: 99%

The ecology of mosquitoes in an irrigated vegetable farm in Kumasi, Ghana: abundance, productivity and survivorship

et al. 2012

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BackgroundIrrigated vegetable farms within the city of Kumasi, Ghana, create hotspots for the breeding of malaria vectors, which could lead to high transmission of malaria. This study investigated the abundance and productivity of mosquitoes in an irrigated vegetable farm in Kumasi, Ghana.MethodsAdult mosquito productivity was estimated five days in a week in different irrigated scheme types (dug-out wells, furrows and footprints) for 12 weeks using emergence traps. Larval sampling was done five days a week to estimate the abundance of larvae from the different irrigated schemes types.ResultsMosquito breeding in the irrigated vegetable field was confined to dug-out wells, furrows and human footprints. Mosquito productivity (m2/week) was highest in the dugout wells followed by the human footprints and the least was in the furrows (11.23, 5.07 and 4.34 An. gambiae/m2/week). Larval abundance for the late instars (3rd, 4th and pupae) also followed the same trend, with the dug-out wells having the highest larval abundance followed by the human footprints and then the furrows (13.24, 6.81, 5.87 larvae/week). Mosquito productivity and abundance was negatively correlated with rainfall (R2 = 0.209; P< 0.01).ConclusionThis study showed that adult and larval mosquito abundance and larval survival were high in the irrigated fields in the irrigated vegetable farm. This therefore, contributed significantly to adult mosquito populations and hence malaria transmission in the city.

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“…This plant is known to reduce oviposition and adult emergence of malaria mosquitoes (Mogi et al, 1986;Rejendraan & Reuben, 1988). However, the communities lacked such information.…”

Section: Discussionmentioning

confidence: 99%

Participatory involvement of farming communities and public sectors in determining malaria control strategies in Mvomero District, Tanzania

Mlozi

Shayo²,

Senkoro³

et al. 2009

Tanzania J Hlth Res

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Addressing the malaria-agriculture linkages requires a broad inter-disciplinary and integrated approach that involves farming communities and key public sectors. In this paper, we report results of participatory involvement of farming communities in determining malaria control strategies in Mvomero District, Tanzania. A seminar involving local government leaders, health and agricultural officials comprising of a total of 27 participants was held. Public meetings in villages of Komtonga, Mbogo, Mkindo, Dihombo and Luhindo followed this. Findings from a research on the impact of agricultural practices on malaria burden in the district were shared with local communities, public sector officials and other key stakeholders as a basis for a participatory discussion. The community and key stakeholders had an opportunity to critically examine the linkages between agricultural practices and malaria in their villages and to identify problems and propose practical solutions. Several factors were identified as bottlenecks in the implementation of malaria control in the area. Lack of community participation and decision making in malaria interventions was expressed as among the major constraints. This denied the community the opportunities of determining their health priorities and accessing knowledge needed to effectively implement malaria interventions. In conclusion, this paper emphasizes the importance of participatory approach that involves community and other key stakeholders in malaria control using an ecosystem approach. An interdisciplinary and integrated approach is needed to involve farmers and more than one sector in malaria control effort.

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Development and Survival of Anopheline Immatures (Diptera: Culicidae) in Rice Fields in Northern Thailand1

Cited by 32 publications

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Survival and emergence of immatureanopheles Arabiensismosquitoes in market-gardener wells in Dakar, Senegal

Survival and emergence of immatureanopheles Arabiensismosquitoes in market-gardener wells in Dakar, Senegal

The ecology of mosquitoes in an irrigated vegetable farm in Kumasi, Ghana: abundance, productivity and survivorship

Participatory involvement of farming communities and public sectors in determining malaria control strategies in Mvomero District, Tanzania

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