| culex mosquitoes (diptera: culicidae) egg laying in traps loaded with bacillus thuringiensis variety israelensis and baited with skatole. | the southern house mosquito, culex quinquefasciatus, is an important human health pest as a vector of several pathogens, including agents of lymphatic filariasis and arboviruses like west nile virus. we conducted preliminary experiments in recife, brazil, to explore applications of culex oviposition attractants in combination with bacillus thuringiensis variety israelensis (bti) in an attract-and-kill approach. simple, cost-effective oviposition traps, br-ovt, loaded with bti and baited with or ... | 2010 | 20496581 |
| integrated control measures against culex quinquefasciatus, the vector of filariasis in recife. | integrated control measures against culex quinquefasciastus have been implemented in a pilot urban area in recife, brazil. about 3,000 breeding sites found within the operational area were responsible for very high mosquito densities recorded during the pretrial period. physical control measures have been applied to cess pits before starting a series of 37 treatments of the other sites with bacillus sphaericus strain 2362, over 27 months. in spite of the difficulties due to environmental conditi ... | 1995 | 8524072 |
| impact of a 26-month bacillus sphaericus trial on the preimaginal density of culex quinquefasciatus in an urban area of recife, brazil. | a field trial using the entomopathogen bacillus sphaericus against culex quinquefasciatus was conducted in a district of recife, brazil, an area with a high prevalence of lymphatic filariasis. in this urban area more than 2,500 cx. quinquefasciatus breeding sites within a 1.2-km2 area were found and subsequently submitted to a long-term treatment with b. sphaericus. to evaluate the impact of treatment on the densities of cx. quinquefasciatus preimaginal forms, 26 breeding sites, representative o ... | 2001 | 11345418 |
| reversal of low-level resistance to bacillus sphaericus in a field population of the southern house mosquito (diptera:culicidae) from an urban area of recife, brazil. | a larval population of culex quinquefasciatus say from an urban area (coque) of recife, brazil, submitted to selection with bacillus sphaericus neide for a 26-mo trial, was 10 times less susceptible to b. sphaericus and slightly more susceptible to bacillus thuringiensis israelensis, compared with untreated populations. the low-level resistance to b. sphaericus was unstable in the absence of selection pressure. the lc50 of b. sphaericus to the coque population declined gradually and attained a s ... | 1997 | 9145030 |
| efficacy of bacillus sphaericus in control of the filariasis vector culex quinquefasciatus in an urban area of olinda, brazil. | the efficacy of bacillus sphaericus 2362 against culex quinquefasciatus was tested in 1991-94 in a major brazilian endemic zone for bancroftian filariasis. continuous selection pressure against the mosquito population was sustained for 18 months through treatment of 2500 potential breeding sites occurring within a 5.7-km2 urban area in the metropolitan region of recife. the impact of this control intervention was evaluated by comparing entomological indices with those from an untreated area. app ... | 2000 | 11132372 |