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Research: Mosquito control via inbuilt net hoisting windows: the inverted S/O channel/grip device option

December 9, 2015 - 20:22 -- Bart G.J. Knols
Francis S.O. Ugwu
MWJ2015, 6, 14
Article type: 
Effective control of in-house mosquitoes, due to entry prevention, takes advantage of the behavioural preferences of endophagy and endophily of mosquitoes. Insecticide-treated nets (ITN) adopt this, but is burdened with challenges, which result in dwindling adoption of the methodology in the tropics. An alternative is prevention of vector-human contact through house modifications, which adopts S/O channel/grip devices that form attachments to existing windows. Inverted S/O channel/grip frame (ISOWF) was therefore devised as an integrated window frame, which could be used for direct net attachment and housing shutters. The ISOWF is a lightweight material weighing 1/6 of the equivalent size of wood. Appropriate dies were employed to form channels from thin iron sheets in the preferred shape and size of a laterally inverted letter ‘S’ (ƨ). The upper half was minimised to form and facilitate the ‘O’ griping of nets, while the remaining half was bloated to house window shutters. Net hoisting or de-hoisting periods were determined by timing. A room screened with a net was attached to the device and situated next to a mosquito breeding room. This was used to evaluate the effectiveness of the method. The time taken to hoist the net was measured. The frame was constructed like a metal/ wooden frame, except that the anterior view had two steps. The average time taken to hoist or de-hoist a net across a 60 cm x 120 cm window, formed by the frame, was 5.96 and 1.68 minutes, respectively. The nets retained their integrity. Mixed mosquito populations numbering 1,341 in total could not gain access to a room with carbon dioxide attractant, and the ISOWF screen prevented passage.
 The ISOWF acts as a potential mosquito entry-prevention device, which further provides reinforcement to house screening. It forms an effective mosquito control device, which brands house screening as a sustainable environment for mosquito control, and subsequently, malaria control. This will also control the overall indoor densities of nuisance mosquitoes and other insect vectors.

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Bart G.J. Knols's picture
Submitted by Bart G.J. Knols on
Dear Ole, Please log in, so that you can access the pdf of the article. It has drawings and pictures in it. Best wishes, Bart

Submitted by Peter Okechukwu on
This is a master-piece. I have used the technology since 1997 to reduce cost and achieve goals better. It enhances regular washing of window nets and replacement of an old net at a cheaper cost. I recommend it to all. I am glad that someone has published what I have been waiting to publish. May be, one day, I will display varied models in my own work after many years of research through prolonged use and results from friends who will like to share their experiences through my survey.