Sampling Gravid<i>Culex quinquefasciatus</i>(Diptera: Culicidae) in Tanzania with Traps Baited with Synthetic Oviposition Pheromone and Grass Infusions

Mboera, Leonard E. G.; Takken, Willem; Mdira, K. Y.; Pickett, John A.

doi:10.1603/0022-2585-37.1.172

Cited by 69 publications

(51 citation statements)

References 6 publications

(10 reference statements)

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“…Furthermore, knowledge of the semiochemicals mediating mosquito–plant interaction can be utilized in luring mosquitoes into traps baited with highly selective insecticides or entomopathogenic agents such as fungi and viruses. The potential of this approach in integrated vector management is exemplified in Culex quinquefasciatus oviposition pheromone (( 5R , 6S )-acetoxy-5-hexadecanolide) which when combined with the insect growth regulator pyriproxifen resulted in increased oviposition accompanied by killing of the emerging larvae (Agelopoulos et al, 1999; Mboera et al, 2000). …”

Section: Potential Application Of Phytochemicals In Mosquito Vectomentioning

confidence: 99%

Volatile phytochemicals as mosquito semiochemicals

Nyasembe

Torto

2014

Phytochemistry Letters

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Plant biochemical processes result in the release of an array of volatile chemical substances into the environment, some of which are known to play important plant fitness enhancing functions, such as attracting pollinators, thermal tolerance of photosynthesis, and defense against herbivores. Cunningly, phytophagous insects have evolved mechanisms to utilize these volatiles to their own advantage, either to colonize a suitable host for feeding, reproduction and oviposition or avoid an unsuitable one. The volatile compounds involved in plant–insect chemical interactions have been widely exploited in the management of agricultural pests. On the other hand, use of plant volatiles in the management of medically important insects is limited, mainly due to paucity of information on their role in disease vector–plant interactions. To date, a total of 29 plant volatile compounds from various chemical classes, including phenols, aldehydes, alcohols, ketones and terpenes, have been identified as mosquito semiochemicals. In this review, we present highlights of mosquito–plant interactions, the available evidence of nectar feeding, with particular emphasis on sources of plant attractants, methods of plant volatile collection and the candidate plant volatile compounds that attract mosquitoes to nectar sources. We also highlight the potential application of these phytochemical attractants in integrated mosquito management.

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Section: Potential Application Of Phytochemicals In Mosquito Vectomentioning

confidence: 99%

Volatile phytochemicals as mosquito semiochemicals

Nyasembe

Torto

2014

Phytochemistry Letters

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“…Skatole, (3-methylindole) a naturally occurring compound in faeces, was prepared from fermented Bermuda grass and has strongly induced oviposition at concentrations ranging from 10 −5 to 10 −3 ppm in water for Culex quinquefasciatus 20–23 . Skatole has also been successfully used in the field with oviposition bait trap sites in Tanzania for this mosquito species 24,25 , however, higher concentration of the compound has shown a repulsive effect 21 . Culex quinquefasciatus mosquitoes, initially repulsed by high concentrations of skatole, were shown to reverse their preference for oviposition sites when reared in skatole at the same concentration 18 .…”

Section: Introductionmentioning

confidence: 99%

Dengue virus infection changes Aedes aegypti oviposition olfactory preferences

Gaburro

Paradkar

Klein

et al. 2018

Sci Rep

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Aedes aegypti mosquitoes, main vectors for numerous flaviviruses, have olfactory preferences and are capable of olfactory learning especially when seeking their required environmental conditions to lay their eggs. In this study, we showed that semiochemical conditions during Aedes aegypti larval rearing affected future female choice for oviposition: water-reared mosquitoes preferred to lay eggs in water or p-cresol containers, while skatole reared mosquitoes preferred skatole sites. Using two independent behavioural assays, we showed that this skatole preference was lost in mosquitoes infected with dengue virus. Viral RNA was extracted from infected female mosquito heads, and an increase of virus load was detected from 3 to 10 days post infection, indicating replication in the insect head and possibly in the central nervous system. Expression of selected genes, potentially implied in olfactory learning processes, were also altered during dengue infection. Based on these results, we hypothesise that dengue virus infection alters gene expression in the mosquito’s head and is associated with a loss of olfactory preferences, possibly modifying oviposition site choice of female mosquitoes.

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“…Gravid females of other mosquitoes, such as Culex nigripalpus (Theobald) (Ritchie 1984), Cx. quinquefasciatus (Say) (Isoe et al 1995b; Mboera et al 2000), and Cx. tarsalis Coq.…”

Section: Introductionmentioning

confidence: 99%

Oviposition Responses of the Mosquitoes Aedes aegypti and Aedes albopictus to Experimental Plant Infusions in Laboratory Bioassays

Ponnusamy

Böröczky

et al. 2010

J Chem Ecol

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Attraction of the mosquitoes Aedes aegypti and Ae. albopictus to plant infusions was evaluated by using a modified sticky-screen bioassay that improved the resolution of mosquito responses to odorants. Under bioassay conditions, solid-phase microextraction-gas chromatographic analyses of the volatile marker chemical indole showed that odorants diffused from bioassay cups, forming a concentration gradient. Infusions were prepared by separately fermenting senescent leaves of eight plant species in well water. Plant infusions were evaluated over an 8-fold range of leaf biomass and/or a 28d fermentation period. The responses of gravid females of both mosquito species varied with the plant species and biomass of plant materials used to make infusions, and with the length of the fermentation period. Infusions made from senescent bamboo (Arundinaria gigantea) and white oak (Quercus alba) leaves were significantly attractive to both mosquitoes. In general, infusions prepared by using low biomass of plant material over a 7–14d fermentation period were most attractive to Ae. aegypti. In contrast, Ae. albopictus was attracted to infusions made using a wider range of plant biomass and over a longer fermentation period. Both mosquito species were more attracted to a non-sterile white oak leaf infusion than to white oak leaf infusion that was prepared using sterilized plant material and water, thus suggesting a role for microbial activity in the production of odorants that mediate the oviposition response of gravid mosquitoes.

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Sampling GravidCulex quinquefasciatus(Diptera: Culicidae) in Tanzania with Traps Baited with Synthetic Oviposition Pheromone and Grass Infusions

Cited by 69 publications

References 6 publications

Volatile phytochemicals as mosquito semiochemicals

Volatile phytochemicals as mosquito semiochemicals

Dengue virus infection changes Aedes aegypti oviposition olfactory preferences

Oviposition Responses of the Mosquitoes Aedes aegypti and Aedes albopictus to Experimental Plant Infusions in Laboratory Bioassays

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