Inability of the lone star tick,Amblyomma Americanum(L.), to resist desiccation and maintain water balance following application of the entomopathogenic fungusMetarhizium anisopliaevar.anisopliae(Deuteromycota)
| Autor: | Eric J. Rellinger, Jay A. Yoder, Joshua B. Benoit, Jacob T. Ark, Justin L. Tank |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | International Journal of Acarology. 32:211-218 |
| ISSN: | 1945-3892 0164-7954 |
| DOI: | 10.1080/01647950608684463 |
| Popis: | We report that female lone star ticks (Amblyomma americanum) experience a rapid change in water permeability when treated with the entomopathogenic fungus Metarhizium anisopliae. The amount of water loss is nearly double the rate of control ticks not exposed to this fungus. As a result, ticks are prevented from stabilizing body water levels (water gain ≠ water loss) at hydrating atmospheres greater than the critical equilibrium activity (CEA) of 0.85a v-0.93av (a v = % RH/100) and reach their dehydration tolerance limit in less time. Thus, disruption of water balance is a pathogenic consequence of fungus infection. This served as a benchmark for evaluating effects on ticks of frequently encountered soil molds in nature (wild tick isolates), Aspergillus niger, Cladosporium cladosporioides, Penicillium glabrum and Scopulariopsis brevicaulis. In contrast to M. anisopliae treatment, no effect on tick water balance was noted with topical application of C. cladosporioides, but water loss rates of ticks... |
| Databáze: | OpenAIRE |
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