Tick Control Methods for <i>Amblyomma americanum</i> in Virginia: Applications and Modeling

<p>Tick-borne diseases continue to increase in the United States, and yet no comprehensive method of tick control currently exists. The lone star tick, <em>Amblyomma americanum</em>, is an aggressive human-biting tick and vector of several pathogens which effect both humans and other animals. Standard control methods do not work as well for<em> A. americanum</em> as they do for the more commonly studied blacklegged tick,<em> Ixodes scapularis</em>. TickBot, a tick-killing robot, is a potential method to control <em>A. americanum</em> that lures ticks to its path with carbon dioxide and the ticks die from contact with a permethrin-treated cloth that is dragged behind. Another method proposed as a biological control of ticks are helmeted guinea fowl,<em> Numida meleagris</em>. However, <em>N. meleagris</em> are also potential hosts of <em>A. americanum</em>. To better understand the ecological dynamics underlying tick control methods, mathematical models can be used to replicate field studies. The purpose of this dissertation was to study the effect of two control methods, the TickBot and <em>N. meleagris</em>, and their effect on<em> A. americanum</em> both in the field and through agent-based modeling. A review of previous studies found that no control method works well for all species and all life stages. Few methods exist that are effective in controlling <em>A. americanum</em> without broadcasting acaricide, which can have negative effects on the environment. This suggested that integrated tick management (ITM) systems are the best option for controlling ticks. The first study of <em>N. meleagris</em> and <em>A. americanum</em> found that <em>N. meleagris</em> provided some reduction in nymph densities, but <em>N. meleagris</em> were also found to be hosts of <em>A. americanum</em> nymphs. An agent-based model was developed to assess the use of the TickBot and extended to also include <em>N. meleagris</em> as an ITM. The TickBot model found the best treatment scenario was running the TickBot three times a week with carbon dioxide.The ITM model that included both TickBot and <em>N. meleagris</em> had unclear efficacy with addition of the biological control that can also be a host. Overall, more research is needed to find an effective ITM of <em>A. americanum</em>, as well as other tick species.</p>

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Biological Sciences

Year dc:date.available

2019

Author dc:creator

• White, Alexis Lynn

Contributors dc:contributor

• Holly D. Gaff
• Wayne L. Hynes
• R. Jory Brinkerhoff

• Agent-based modeling
• Amblyomma americanum
• Modeling
• Numida meleagris
• Tick control
• Ticks
• Ecology and Evolutionary Biology
• Mathematics

Statement dc:rights

• <p>In Copyright. URI: <a href="http://rightsstatements.org/vocab/InC/1.0/">http://rightsstatements.org/vocab/InC/1.0/</a> This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).</p>

Identifier

9781392863107

OAI identifier oai:identifier

oai:digitalcommons.odu.edu:biology_etds-1108