Diel biting activity of Culex (Melanoconion) caudelli in Trinidad, West Indies

Chadee, Dave D.; Tikasingh, Elisha S.

doi:10.1111/j.1365-2915.1989.tb00221.x

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…hut we have no data on the flight paths of Cx cmdelli. Chadee & Tikasingh (1989) reported nocturnal foraging behaviour of Cx caudelli during both moonless and moonlit nights. This suggests that vision may not play a signiflcant role in the host-seeking behaviour (Gillett, 197Y: ('harlwood et a/., 1986) and therefore, by inference, neither in oviposition nor dispersal.…”

Section: Resultsmentioning

confidence: 99%

“…This $-week interval represents the time required from oviposition to adult emergence, i.e. 2 4 + 9 days at 28°C (Chadee & Tikasingh, 1985).…”

Section: Resultsmentioning

confidence: 99%

“…Six strains of virus, including Caraparu and Ilheus, have been isolated from this mosquito in Brazil and Trinidad (Jonkers et al, 1968;Theiler & Downs, 1973). Because very little is known of the biology of this important vector in Trinidad, studies on Cx caudelli were initiated during 1977 (Chadee, 1982), resulting in description of the eggs (Chadee, 1986), laboratory observation on the life cycle (Chadee & Tikasingh, 1985) and the die1 activity (Chadee & Tikasingh, 1989) of Cx caudelli.…”

Section: Introductionmentioning

confidence: 99%

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Distribution and seasonality of Culex (Melanoconion) caudelli, a vector of arboviruses in Trinidad

Chadee¹,

Tikasingh²

1992

Medical Vet Entomology

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Seasonal and spatial distributions of the arbovirus vector mosquito Culex (Melanoconion) caudelli Dyar and Knab (Diptera: Culicidae) in the Aripo-Wallerfield forest, Trinidad, were studied by collecting mosquitoes attracted to mouse-baited traps in forest, ecotone and savannah, one day per week throughout the year, 98% of the Cx caudelli mosquitoes were collected during the wet season, with a significant positive correlation between rainfall and mosquito catch. The reverse occurred during the dry season. Cx caudelli displayed a preference for the ecotone where 67% were collected, while 32% and 1% were collected in the forest and savannah respectively.

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Section: Resultsmentioning

confidence: 99%

“…This $-week interval represents the time required from oviposition to adult emergence, i.e. 2 4 + 9 days at 28°C (Chadee & Tikasingh, 1985).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Distribution and seasonality of Culex (Melanoconion) caudelli, a vector of arboviruses in Trinidad

Chadee¹,

Tikasingh²

1992

Medical Vet Entomology

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Tidal and Lunar Rhythms

Introducing Biological Rhythms

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Temperature and time of host-seeking activity impact the efficacy of chemical control interventions targeting the West Nile virus vector, Culex tarsalis

Kalmouni,

Will,

Townsend

et al. 2024

PLoS Negl Trop Dis

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West Nile virus (WNV) is the leading mosquito-borne disease causing-pathogen in the United States. Concerningly, there are no prophylactics or drug treatments for WNV and public health programs rely heavily on vector control efforts to lessen disease incidence. Insecticides can be effective in reducing vector numbers if implemented strategically, but can diminish in efficacy and promote insecticide resistance otherwise. Vector control programs which employ mass-fogging applications of insecticides, often conduct these methods during the late-night hours, when diel temperatures are coldest, and without a-priori knowledge on daily mosquito activity patterns. This study’s aims were to 1) quantify the effect of temperature on the toxicity of two conventional insecticides used in fogging applications (malathion and deltamethrin) to Culex tarsalis, an important WNV vector, and 2) quantify the time of host-seeking of Cx. tarsalis and other local mosquito species in Maricopa County, Arizona. The temperature-toxicity relationship of insecticides was assessed using the WHO tube bioassay, and adult Cx. tarsalis, collected as larvae, were exposed to three different insecticide doses at three temperature regimes (15, 25, and 35°C; 80% RH). Time of host-seeking was assessed using collection bottle rotators with encephalitis vector survey traps baited with dry ice, first at 3h intervals during a full day, followed by 1h intervals during the night-time. Malathion became less toxic at cooler temperatures at all doses, while deltamethrin was less toxic at cooler temperatures at the low dose. Regarding time of host-seeking, Cx. tarsalis, Aedes vexans, and Culex quinquefasciatus were the most abundant vectors captured. During the 3-hour interval surveillance over a full day, Cx. tarsalis were most-active during post-midnight biting (00:00–06:00), accounting for 69.0% of all Cx. tarsalis, while pre-midnight biting (18:00–24:00) accounted for 30.0% of Cx. tarsalis. During the 1-hour interval surveillance overnight, Cx. tarsalis were most-active during pre-midnight hours (18:00–24:00), accounting for 50.2% of Cx. tarsalis captures, while post-midnight biting (00:00–06:00) accounted for 49.8% of Cx. tarsalis. Our results suggest that programs employing large-scale applications of insecticidal fogging should consider temperature-toxicity relationships coupled with time of host-seeking data to maximize the efficacy of vector control interventions in reducing mosquito-borne disease burden.

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Diel biting activity of Culex (Melanoconion) caudelli in Trinidad, West Indies

Cited by 5 publications

References 12 publications

Distribution and seasonality of Culex (Melanoconion) caudelli, a vector of arboviruses in Trinidad

Distribution and seasonality of Culex (Melanoconion) caudelli, a vector of arboviruses in Trinidad

Tidal and Lunar Rhythms

Temperature and time of host-seeking activity impact the efficacy of chemical control interventions targeting the West Nile virus vector, Culex tarsalis

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