Effect of aqueous extracts of Baccharis trimera on development and hatching of Rhipicephalus microplus (Acaridae) eggs.
This study evaluated the effects of aqueous extracts of Baccharis trimera (Less.) DC (Asteraceae), colloquially known as carqueja, on egg production, and hatching rate of larvae of Rhipicephalus microplus. Plant samples were collected in Montes Claros, north of Minas Gerais, Brazil. Adult female ticks were distributed into 24 homogeneous groups of 10. The in vitro test was performed by immersing each group in 10 ml solutions of aqueous extracts at 50, 100, 150, or 200mg of fresh leaves ml(-1). These concentrations were compared with distilled water as negative control and a commercial product as positive control and the tests were repeated four times. The carqueja extract at concentrations of 150 and 200mg of fresh leaves ml(-1) showed 100% efficacy in inhibiting egg hatching and therefore could have potential as an acaricide.
Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, Av Universitária 1000, Universitário, Montes Claros MG 39400-006, Brazil.
Sirlene Fernandes
SF
Lázaro
Leydiana Duarte
LD
Fonseca
Ernane Ronie
ER
Martins
Neide Judith Faria
NJ
de Oliveira
Eduardo Robson
ER
Duarte
D056810:Acaricides / Q000494:pharmacology*; D000818:Animals; D031175:Baccharis / Q000737:chemistry*; D001938:Brazil; D005260:Female; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D010063:Ovum / Q000187:drug effects / Q000254:growth & development; D010936:Plant Extracts / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry; D048494:Rhipicephalus / Q000187:drug effects* / Q000254:growth & development
D056810:Acaricides; D010936:Plant Extracts