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Open AccessArticle

Size of Openings in Water-Holding Containers: Impact on Oviposition by Culex (Culex) Mosquitoes

Florida Medical Entomology Laboratory, Department of Entomology and Nematology, University of Florida-IFAS, 200 9th St. S.E., Vero Beach, FL 32962, USA
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Insects 2019, 10(9), 257; https://doi.org/10.3390/insects10090257
Received: 30 July 2019 / Revised: 12 August 2019 / Accepted: 16 August 2019 / Published: 21 August 2019
(This article belongs to the Special Issue Vector Biology and Ecology)
To assess how a grate covering a catch basin impacts oviposition by Culex mosquitoes, a field study was conducted in south Florida using containers with two types of covers, with openings of equal area, but different configurations. One opening mimicked a catch basin grate with 16 small openings, while the other cover had just one large opening. The number and presence of egg rafts in six of each container and cover combination was recorded over 18 nights at two field sites, consisting of a wastewater management facility area and residential subdivision. Three mosquito species, all belonging to the subgenus Culex accounted for more than 99% of total egg rafts collected: Culex nigripalpus (n = 1766), Culex quinquefasciatus (n = 754) and Culex coronator (n = 526). Approximately 90% of Cx. nigripalpus and Cx. coronator egg rafts were deposited in the containers with the large opening cover; whereas more Cx. quinquefasciatus egg rafts were laid in the containers with small opening covers than those of Culex nigripalpus and Culex coronator combined. Similar patterns of egg laying activity were noted at each sampling stations. These results suggest that for locating oviposition sites Culex quinquefasciatus may rely more on olfactory clues, while other Culex species depend more on visual clues. View Full-Text
Keywords: Culex nigripalpus 1; Culex quinquefasciatus 2; Culex coronator 3; oviposition 4; oviposition site selection 5 Culex nigripalpus 1; Culex quinquefasciatus 2; Culex coronator 3; oviposition 4; oviposition site selection 5
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Shin, D.; O’Meara, G.F.; Civana, A. Size of Openings in Water-Holding Containers: Impact on Oviposition by Culex (Culex) Mosquitoes. Insects 2019, 10, 257.

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