Variations of the External Male Genitalia in Three Populations of Triatoma infestans Klug, 1834

Pires, Herton Helder Rocha; Barbosa, Silvia Ermelinda; Margonari, Carina; Jurberg, José; Diotaiuti, Liléia

doi:10.1590/s0074-02761998000400011

Cited by 22 publications

(18 citation statements)

References 3 publications

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“…However, this observation needs to be confirmed by the analysis of domestic insects from both the Bolivian Chaco and Paraguay. The differentiation between T. infestans from Bolivia and Argentina/Brazil (or Andean/nonAndean) reported here has also been detected by cytogenetic methods (F Panzera, manuscript in preparation), and agrees with morphological differences observed in the male genitalia of insects from Bahia, Brazil and Cochabamba, Bolivia (Pires et al 1998). Although the efficiency of allozyme markers in detecting such geographical structuring is controversial (Garcia et al 1995), our present results appear to support it (Table IV).…”

Section: T Infestans T Infestans T Melanosomasupporting

confidence: 88%

Mitochondrial DNA variation of Triatoma infestans populations and its implication on the specific status of T. melanosoma

Monteiro

Pérez²,

Panzera³

et al. 1999

Mem. Inst. Oswaldo Cruz

106

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Section: T Infestans T Infestans T Melanosomasupporting

confidence: 88%

Mitochondrial DNA variation of Triatoma infestans populations and its implication on the specific status of T. melanosoma

Monteiro

Pérez²,

Panzera³

et al. 1999

Mem. Inst. Oswaldo Cruz

106

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“…Dujardin et al (1998) used enzymatic comparisons to demonstrate the limited genetic differences between neighbouring populations of T. infestans, suggesting a recent and relatively rapid dispersal of this species from its presumed Bolivian origin. We have previously found morphological differences between T. infestans from Bolivia and Brazil (Pires et al 1998) and we present here evidence for biological differences between T. infestans populations from the two regions.…”

supporting

confidence: 70%

Comparative developmental and susceptibility to insecticide of Bolivian and Brazilian populations of Triatoma infestans

Pires

Barbosa

Diotaiuti

2000

Mem. Inst. Oswaldo Cruz

Self Cite

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“…Sorokin. Pires et al (1998Pires et al ( , 2000 also found morphological and biological differences between Bolivian and Brazilian populations of T. infestans.…”

Section: Mortality Of T Infestans Under Constant and Fluctuatingmentioning

confidence: 83%

“…Sorokin. Pires et al (1998Pires et al ( , 2000 also found morphological and biological differences between Bolivian and Brazilian There were no significant differences in the assay with daily fluctuation cycles (12:12h) and two temperatures: 18/26ºC and 26/18ºC, or 34/26ºC and 26/34ºC (Table 1). These data indicate that mortality is not affected by the order in which extreme temperatures (18ºC or 34ºC) occur, before or after the optimal temperature (26ºC).…”

Section: Mortality Of T Infestans Under Constant and Fluctuatingmentioning

confidence: 85%

Effect of constant and cyclical temperatures on the mortality of Triatoma infestans (Klug) (Hemiptera: Reduviidae) treated with Beauvaria bassiana (Bals.) Vuill. (Hyphomycetes)

Lecuona¹,

Rodriguez²,

Rossa³

2005

Neotrop. Entomol.

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Neotropical Entomology 34(4): 675-679 (2005) Efecto de Temperaturas Constantes y Cíclicas sobre la Mortalidad de Triatoma infestans (Klug) (Hemiptera:Reduviidae) Tratada con Beauveria bassiana (Bals.) Vuill. (Hyphomycetes) RESUMEN -En el presente trabajo se analizó la mortalidad de Triatoma infestans (Klug) tratada con Beauveria bassiana (Bals.) Vuill. bajo diferentes régimenes de temperatura. Los porcentajes de mortalidad a 26ºC y a 22ºC fueron más altos mientras que los más bajos se registraron a 34ºC constantes. Las combinaciones 26/34ºC o 34/26ºC (12:12h) fueron significativamente diferentes a las de 18/26ºC o 26/ 18ºC mostrando que es mayor el efecto de altas temperaturas (34ºC) sobre la mortalidad e indicando también que con una temperatura extrema alta unida a una óptima de 26ºC, decrece la susceptibilidad de T. infestans a la infección por parte de B. bassiana. Se observó que la exposición a temperaturas extremas (18ºC o 34ºC) junto a la óptima de 26ºC en ciclos de 8:8:8h reduce la mortalidad de T. infestans. Con alternancia de 6h (6:6:6:6h) se observó que sólo la mortalidad de la combinación 34/30/26/22°C fue similar a las de 22ºC y 26ºC constantes. La ocurrencia de temperaturas extremas durante el primer tramo afectan menos la mortalidad si el período en que ocurren no es tan largo (p.ej. 6h). Sin embargo, si a una temperatura extrema inicial le sigue una caída abrupta (34/22/26/30ºC), la mortalidad se ve significativamente reducida. Los resultados indicarían que es preferible realizar las aplicaciones en el campo al atardecer, para evitar la influencia negativa de cambios bruscos de temperaturas o temperaturas elevadas durante las primeras etapas críticas del ciclo infeccioso de los hongos entomopatógenos.PALABRAS CLAVE: Regímen fluctuante, germinación, hongo entomopatógeno ABSTRACT -The mortality of Triatoma infestans (Klug) treated with Beauvaria bassiana (Bals.) Vuill. under several temperature regimes was analyzed. Mortality rates were highest at 26ºC and 22ºC and lowest at constant 34ºC. The combinations 26/34ºC or 34/26ºC (12:12h cycles) were significantly different from the combinations 18/26ºC and 26/18ºC, showing that high temperatures (34ºC) affect mortality most significantly. The combinations also indicate that when an extreme high temperature is associated with an optimal temperature of 26ºC, the susceptibility of T. infestans to B. bassiana infection decreases. Exposure to extreme temperature (18ºC or 34ºC) associated with an optimal temperature of 26ºC in 8:8:8h cycles, reduces the mortality of T. infestans. In cycles of 6:6:6:6h, only the mortality associated with the 34/30/26/22ºC combination was similar to the combinations at constant 22ºC and 26ºC. Extreme temperatures during the first stage affect mortality less than when this period is not longer than 6h. Mortality decreases significantly when an extreme high initial temperature is followed by an abrupt fall (34/22/26/30ºC). Our results indicate that Beauvaria bassiana should be applied to the field in the late afternoon to avo...

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Variations of the External Male Genitalia in Three Populations of Triatoma infestans Klug, 1834

Cited by 22 publications

References 3 publications

Mitochondrial DNA variation of Triatoma infestans populations and its implication on the specific status of T. melanosoma

Mitochondrial DNA variation of Triatoma infestans populations and its implication on the specific status of T. melanosoma

Comparative developmental and susceptibility to insecticide of Bolivian and Brazilian populations of Triatoma infestans

Effect of constant and cyclical temperatures on the mortality of Triatoma infestans (Klug) (Hemiptera: Reduviidae) treated with Beauvaria bassiana (Bals.) Vuill. (Hyphomycetes)

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