| acaricide susceptibility of amblyomma variegatum (acari:ixodidae) from puerto rico and guadeloupe. | base-line data on acaricide susceptibility of larvae and of larvae and nymphs of the tropical bont tick, amblyomma variegatum (fabricius), from puerto rico and guadeloupe were collected on 14 and six compounds, respectively. nymphs 7-8 weeks old from puerto rico and guadeloupe, and larvae 3-4 weeks old from guadeloupe, were exposed for 24 or 48 h to residues of acetone dilutions of technical-grade or commercial formulations of acaricides on disposable glass pipettes. effectiveness of the acarici ... | 1991 | 1773678 |
| eradication of a new focus of amblyomma variegatum in puerto rico. | in may 1992 an infestation with the tropical bont tick appeared in a small dairy heifer replacement herd in camuy, puerto rico, a completely new site located near puerto rico's northwest coast. this finding occurred after some three years of no infestation in either puerto rico or the u.s. virgin islands and is not suspected of being associated with any previous infestations. the methods used to eradicate this tick include spray treatment at a two-week interval of all domestic livestock, with am ... | 1993 | 8134653 |
| past and present national tick control programs. why they succeed or fail. | the historical reasons for the introduction of tick control during the nineteenth century are reviewed. background and concepts for the choice between long-term tick control and tick eradication are compared. case studies of large-scale tick control or eradication programs in africa, australia, the united states, and the caribbean are used to highlight successes and failures. the main reasons for lack of sustainability, or failure, of programs are discussed. these include the economic constraint ... | 2000 | 11193670 |