ATIVIDADE CARRAPATICIDA DO LÁTEX DA PLANTA Hura crepitans L. E DO EXTRATO ETANÓLICO DA PLANTA Rinorea pubiflora (Benth.) Sprague & Sandwith EM LARVAS DE Boophilus microplus E Rhipicephalus sanguineus
The control of the ticks Rhipicephalus sanguineus and Boophilus micropulus is of public and veterinary health importance. These species are vectors of very important diseases such as ehrlichosis, babesiosis, anaplasmosis as well as producing dermatitis and anemia.The indiscriminate use of chemical acaricides for tick control facilitates the induction of parasite resistance and the need for the application of higher doses to achieve effectiveness with the consequent deleterious impact on the environment.The acaricidal activity of the latex obtained from Hura crepitans and the ethanolic extract of Rinoria pubiflora (Canela de macaco) leaves against ?infectious? larvae of R. sanguineus and B. micropulus was evaluated by filter paper contact toxicity bioassays. The biotoxicity of the latex and the extract against the larvae was assessed separately and in duplicate. The larvae were incubated in filter paper envelopes impregnated with the compounds in 5 different concentrations as for 24 hours. For the latex H. Crepitans was utilized differents concentration as: 25.5; 51.2; 76.8; 102.5 e 128.1 mg/mL of destilate water and for the ethanolic extract was utilized 26.7; 53.4; 80.0, 106.7 e 133.4mg/mL of destilate water. The larvae were observed at 6, 12 and 24 hours and their mortality rate was recorded. The H. crepitans L latex demonstrated a significant acaricidal activity (over 95 The chemical analyses of these compounds revealed that the latex of H. crepitans L and that the ethanolic extract of R. pubiflora contained alkaloids and steroids respectively.The control of the ticks Rhipicephalus sanguineus and Boophilus micropulus is of public and veterinary health importance. These species are vectors of very important diseases such as ehrlichosis, babesiosis, anaplasmosis as well as producing dermatitis and anemia.The use of natural products obtained from our diverse native flora as acaricidal agents will greatly contribute to the preservation of the environment and the sustainable development of the region.
Advisor:Luis Marcelo Aranha Camargo
School:Fundação Universidade Federal de Rondônia
Source Type:Master's Thesis
Date of Publication:03/01/2006