More about the role of 2,6-dichlorophenol in tick courtship: identification and olfactometer bioassay in Amblyomma cajennense and Rhipicephalus sanguineus.
This study aimed to identify 2,6-dichlorophenol (2,6-DCP) in Amblyomma cajennense and to evaluate its role in A. cajennense and Rhipicephalus sanguineus courtship. Hexanic extract from attractive females was purified by solid phase extraction and the phenol was identified by the single ion monitoring method using GC/MS. In an olfactometer, the responses of A. cajennense and R. sanguineus males to females, control rubber septa or rubber septa impregnated with 2,6-DCP at 50, 500, and 5000 ng, respectively, were studied. 2,6-DCP was identified in A. cajennense extract and the males oriented themselves toward the concentration of 500 ng. These septa and the females were recognized as copula partners. The septa treated with 2,6-DCP did not attract and were not even recognized by the R. sanguineus males, whereas the females were recognized. Due to the presence of 2,6-DCP in A. cajennense and the results of biological bioassays, it was concluded that this compound acts as an attractant and mounting sex pheromone in this tick, but it does not play any role in R. sanguineus courtship.
Louly
Carla Cristina Braz
CC
Escola de Veterinária, Universidade Federal de Goiás.
Silveira
Diana da Nóbrega
Dda N
Soares
Sara Fernandes
SF
Ferri
Pedro Henrique
PH
Melo
Ariane Carla Campos de
AC
Borges
Lígia Miranda Ferreira
LM
D000818:Animals; D001681:Biological Assay; D002733:Chlorophenols / Q000302:isolation & purification / Q000494:pharmacology*; D003380:Courtship; D004305:Dose-Response Relationship, Drug; D005260:Female; D026863:Ixodidae / Q000187:drug effects* / Q000502:physiology; D008297:Male; D048508:Rhipicephalus sanguineus / Q000187:drug effects / Q000502:physiology; D012724:Sex Attractants / Q000302:isolation & purification / Q000494:pharmacology* / Q000502:physiology; D012726:Sexual Behavior, Animal / Q000187:drug effects* / Q000502:physiology
D002733:Chlorophenols; D012724:Sex Attractants; C032729:2,6-dichlorophenol