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Seasonal activity and spatial distribution of long star tick amblyomma americanum populations in east central texas usa



Seasonal activity and spatial distribution of long star tick amblyomma americanum populations in east central texas usa



Southwestern Entomologist 9(1): 109-116



Spacial distribution of the A. americanum (L.) was closely associated with microhabitat vapor pressure deficits. Open pasture areas consistently produced significantly (P < 0.01) higher vapor pressure deficits than the canopied (inner ecotone or interior thicket) pasture areas. Correspondingly, the inner ecotone areas yielded significantly (P < 0.05) higher numbers of nymphal and adult lone star ticks than were collected from the outer ecotone for both the 1979 and 1980-1981 study periods. Collections of nymphs indicate a population gradient from the outer, to inner ecotone, to interior thicket, while collections of adult ticks show no significant diversity in population between the inner ecotone and interior thicket. Larval populations were observed to have no significant difference (P > 0.05) between habitats; peak activity occurred 1 mo. earlier in the inner than outer ecotone. Adult and nymphal activity peaks were notably earlier (4-8 wk) than peaks previously reported for more northern latitudes.

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Accession: 006370938

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