[Ovicidal and larvicidal activity in vitro of Eucalyptus globulus essential oils on Haemonchus contortus].
The objective of this work was to evaluate ovicidal and larvicidal effects of Eucalyptus globulus essential oil (EGEO) on Haemonchus contortus. The chemical composition determination of EGEO was through gas chromatography and mass spectrometry. Egg hatch test (EHT) was performed in concentrations 21.75; 17.4; 8.7; 5.43 e 2.71 mg x mL(-1). In larval development test (LDT) were used the concentrations 43.5; 21.75; 10.87; 5.43 e 2.71 mg x mL(-1). Each trial was conducted by negative control with Tween 80 (3%) and positive control, 0.02 mg x mL(-1) of thiabendazole in EHT and 0.008 mg x mL(-1) of ivermectin in LDT. The maximum effectiveness of EGEO on eggs was 99.3% in concentration of 21.75 mg x mL(-1) and on larvae was 98.7% in concentration 43.5 mg x mL(-1). The concentration of EGEO that inhibits 50% of the eggs and larvae was 8.3 and 6.92 mg x mL(-1), respectively. The oil chemical analysis identified as main component the monoterpen 1,8-cineol. EGEO presented ovicidal and larvicidal activities in vitro, revealing a good potential for use in the control of sheep and goat gastrointestinal nematodes.
Macedo
Iara T F
IT
Programa de Pós-graduação em Ciências Veterinárias, Faculdade de Veterinária, Universidade Estadual do Ceará, UECE.
Bevilaqua
Claudia M L
CM
de Oliveira
Lorena M B
LM
Camurça-Vasconcelos
Ana L F
AL
Vieira
Luiz da S
Lda S
Oliveira
Fabrício R
FR
Queiroz-Junior
Eudson M
EM
Portela
Bruno G
BG
Barros
Renata S
RS
Chagas
Ana C S
AC
D000818:Animals; D005052:Eucalyptus; D006189:Haemonchus / Q000187:drug effects* / Q000502:physiology; D007814:Larva / Q000187:drug effects; D009822:Oils, Volatile / Q000494:pharmacology*
D009822:Oils, Volatile