The larvicidal activity of hexane, chloroform and ethyl acetate leaf extracts of Strychnos nuxvomica against the third instar larvae of Culex quinquefasciatus was studied. The ethyl acetate leaf extract was found to be the effective larvicide with LC value of 222.28 and 146.99 ppm after 24 and 48 hours. The results indicate 50 promising larvicidal activity against Culex quinquefasciatus. Furthe...

Because it is often logistically impossible to monitor all catch basins within an operational area, local mosquito control programs will preemptively treat catch basins with larvicides each season. However, these larvicides can, ostensibly, be considered water quality pollutants. To experimentally reduce the use of larvicides toward improving water quality, 30 basins within a small 0.7-km(2) re...

Preparations of the larvicidal crystal from 46-h cultures of Bacillus sphaericus 2362 contain 125-, 110-, 63-, and 43-kilodalton (kDa) proteins (P. Baumann, B. M. Unterman, L. Baumann, A.H. Broadwell, S.J. Abbene, and R.D. Bowditch, J. Bacteriol. 163:738-747, 1985). The 63- and 43-kDa proteins, which have been purified, are not immunologically cross-reactive, and only the 43-kDa protein is toxi...

BACKGROUND: Acalypha indica Linn. has been used as traditional medicine, it contains flavonoids, alkaloids, tannins, saponins, steroids, triterpenoids, and essential oils. AIM: This study aimed to determine the bio-larvicide effects of A. leaf stew silver nanoparticles against Anopheles sp. larvae. METHODS: The fresh leaves extracted using distilled water at 100°C for 30 min. were made by mixin...

A model with six mutually-exclusive compartments related to dengue is studied. Three vector control tools are considered: insecticides (larvicide and adulticide) and mechanical control. The basic reproduction number associated to the model is presented. The problem is studied using an optimal control approach. The human data is based on the dengue outbreak that occurred in Cape Verde. Control m...

Exposure of spring Aedes larvae to Altosid Liquid Larvicide formulated on the granular carrier Biodac under field conditions was evaluated. Both aerial and hand-applied treatments were monitored. Mosquitoes collected from aerially treated sites (9 kg/ha) showed an average 80% mortality. In hand-treated sites excellent control was achieved at label rates of 11.3-14.7 kg/ha (10-13 lb/acre); at do...

Highlights Jackfruit leaf extraction was performed by percolation method using 96% ethanol solvent with flavonoid, saponin, tannin, alkaloid, and steroid terpenoid test. extract effective as a larvicide against larvae of Aedes aegypti. Abstract Background: Dengue Hemorrhagic Fever (DHF) is disease caused the dengue virus, which enters human bloodstream through bite mosquito genus. The DHF contr...

OBJECTIVE To evaluate the larvicidal activity of Azadirachta indica, Melaleuca alternifolia, carapa guianensis essential oils and fermented extract of Carica papaya against Aedes aegypti (Linnaeus, 1762) (Diptera: Culicidae). METHODS The larvicide test was performed in triplicate with 300 larvae for each experimental group using the third larval stage, which were exposed for 24h. The groups wer...