The effect of sublethal concentration of abate on aedes aegypti (linnaeus) and culex quinquefasciatus (says)

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dc.contributor.authorLim, Chia Shian
dc.date.accessioned2016-11-01T03:22:43Z
dc.date.available2016-11-01T03:22:43Z
dc.date.issued2007-04
dc.description.abstractA laboratory study on the effectiveness and the sublethal effects of Abate on several biological parameters of Aedes aegypti and Culex quinquefasciatus was conducted using standard WHO bioassay technique. Late third instar larvae were exposed to larvacide for twenty four hours. The LC50 and LCg5 obtained using Probit analysis for Aedes aegypti were 0.0006 mgll and 0.001 mgll, respectively, with a regression slope of 7.30 ± 0.60, whereas for Culex quinquefasciafus were 0.00088 mgt! and 0.00249 mgll, respectively with a regression slope of 3.64 ± 0.22. Treated parent population (P) of Aedes aegypti, treated parent population (P) and F1 of Culex quinquefasciatus larvae at sublethal concentration of Abate showed prolonged larval duration. Treated F2 Aedes aegypti and F1 Culex quinquefasciatu~ larvae showed significant increase in the total eggs deposited. Significant differences were observed in the mean number of eggs deposited by treated F2. F3 Aedes aegypti and treated F1 Culex quinquefasciatus (P<0.05). Significant reductions of egg hatching percentage were found in treated F1 and F2 Aedes aegypti and treated F1 and F3 of Culex quinquefascaitus (P<O.05). Significant differences were observed in the mean adult emergence time of treated F3 female and male of Aedes aegypti and treated F1 and F2 female of Culex quinquefasciatus (P<0.05). Percentage mortality of F1. F2 and F3 Culex quinquefasciatus larvae were reduced significantly (P<0.05). No mortality was observed in F1 Culex quinquefasciatus pupae; F2 pupae showed significant increased in mortality (P<O.05). Blood engorgement of F1 and F2 of Culex quinquefasciatus were reduced by 7.3% and 4% respectively. Longevity of sucrose-fed population (P) of treated Culex quinquefasciatus females and males and F2 females were reduced significantly (P<O.05). Longevity of blood-fed treated F1 Aedes aegypti females, treated F2 and F3 Culex quinquefasciatus females were reduced significantly (P<O.05). The proportion of Aedes aegypti males of the treated population (P), F1, F2 and F3 were reduced, while the proportion of F3 females increased. The female proportion of treated population (P) of Culex quinquefasciatus increased; the F1 male proportion was reduced. Abate did not affect blood engorgement, mean pupation time, percentage mortality of larva and pupa and longevity of sucrose fed female and male of Aedes aegypti; and the mean Culex quinquefasciatus male emergence time. The percentage mortality of treated F1, F2 and F3 Aedes aegypti and Culex quinquefasciatus larvae after second exposure to LCso decreased.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/2940
dc.subjectEffectiveness and the sublethal effects of Abate onen_US
dc.subjectseveral biological parameters of Aedes aegypti and Culex quinquefasciatusen_US
dc.titleThe effect of sublethal concentration of abate on aedes aegypti (linnaeus) and culex quinquefasciatus (says)en_US
dc.typeThesisen_US
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