The Experts below are selected from a list of 5910 Experts worldwide ranked by ideXlab platform
Terry L Schulze - One of the best experts on this subject based on the ideXlab platform.
-
Early Season Applications of Bifenthrin Suppress Host-seeking Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) Nymphs.
Journal of medical entomology, 2019Co-Authors: Terry L Schulze, Robert A. JordanAbstract:We assessed the efficacy of bifenthrin to suppress Ixodes scapularis Say and Amblyomma americanum (L.) nymphs when applied prior to the initiation of spring host-seeking activity versus when nymphs were already active. Treatment and control plots were sampled for host-seeking ticks every week from mid-April through June, and single occasion bifenthrin applications were done in different sets of treatment plots on 15 April, 29 April, 13 May, and 27 May. Ixodes scapularis nymphs and A. americanum nymphs and adults were effectively suppressed after each application, with at or near 100% suppression of all ticks being observed for up to 8-wk postapplication. Irrespective of the bifenthrin application date, the level of suppression of I. scapularis nymphs never declined below 70% during the study period. However, with the exception of the last application, the suppression of A. americanum nymphs decreased dramatically to below 25% by the conclusion of the trial. The results of this study demonstrated that preseason applications of bifenthrin can mitigate acarological risk of exposure to ticks throughout much of their spring peak activity period.
-
Precipitation and Temperature as Predictors of the Local Abundance of Ixodes scapularis (Acari: Ixodidae) Nymphs
Journal of medical entomology, 2009Co-Authors: Terry L Schulze, Robert A. Jordan, Christopher J. Schulze, Robert W HungAbstract:Populations of Ixodes scapularis Say nymphs were surveyed at a Lyme disease- endemic area for 8 consecutive yr (1998-2005) to characterize annual changes in abundance. Precipitation and temperature were also monitored over the period 1998-2004 to determine their potential value as predictors of tick abundance. Although both parameters showed annual variation, no statistical differences in the annual abundance of I. scapularis nymphs were observed over the 8-yr period. Our results suggest that precipitation and temperature were not predictive of the abundance of I. scapularis nymphs.
-
prevalence of borrelia burgdorferi spirochaetales spirochaetaceae in Ixodes scapularis acari ixodidae adults in new jersey 2000 2001
Journal of Medical Entomology, 2003Co-Authors: Terry L Schulze, Robert W Hung, Rose S Puelle, Daniel Markowski, Robert Jordan, Martin S ChomskyAbstract:Abstract Using polymerase chain reaction, we analyzed 529 Ixodes scapularis Say adults collected from 16 of New Jersey’s 21 counties for the presence of Borrelia burgdorferi, the etiological agent of Lyme disease. Overall, 261 (49.3%) were positive. B. burgdorferi was detected in ticks obtained from each county and from 53 of the 58 (93.1%) municipalities surveyed. The observed statewide prevalence in New Jersey is similar to those reported from other northeastern and mid-Atlantic states.
-
Efficacy of Granular Deltamethrin Against Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) Nymphs
Journal of medical entomology, 2001Co-Authors: Terry L Schulze, Robert W Hung, Daniel Markowski, Robert A. Jordan, R. Chadwick Taylor, Martin S ChomskyAbstract:A single barrier application of granular deltamethrin to the woodland edges of a forested residential community in late spring significantly reduced the abundance of Ixodes scapularis Say nymphs. The application also suppressed the population of Amblyomma americanum (L.) nymphs, which recently became established in the study area. The efficacy of deltamethrin is compared with other commonly used acaricides.
-
Effects of granular carbaryl application on sympatric populations of Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) nymphs.
Journal of medical entomology, 2000Co-Authors: Terry L Schulze, Robert A. Jordan, Robert W HungAbstract:A single application of granular carbaryl approaching the lowest recommended rate to the shrub layer of a forested area in late spring significantly reduced the abundance of Ixodes scapularis Say nymphs throughout their peak activity period, but had little effect on Amblyomma americanum L. nymphs. Factors influencing the efficacy of the application are discussed. The possible explanations for the lack of efficacy of granular carbaryl against A. americanum, including behavior, formulation, and application rate, are discussed.
Robert A. Jordan - One of the best experts on this subject based on the ideXlab platform.
-
Early Season Applications of Bifenthrin Suppress Host-seeking Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) Nymphs.
Journal of medical entomology, 2019Co-Authors: Terry L Schulze, Robert A. JordanAbstract:We assessed the efficacy of bifenthrin to suppress Ixodes scapularis Say and Amblyomma americanum (L.) nymphs when applied prior to the initiation of spring host-seeking activity versus when nymphs were already active. Treatment and control plots were sampled for host-seeking ticks every week from mid-April through June, and single occasion bifenthrin applications were done in different sets of treatment plots on 15 April, 29 April, 13 May, and 27 May. Ixodes scapularis nymphs and A. americanum nymphs and adults were effectively suppressed after each application, with at or near 100% suppression of all ticks being observed for up to 8-wk postapplication. Irrespective of the bifenthrin application date, the level of suppression of I. scapularis nymphs never declined below 70% during the study period. However, with the exception of the last application, the suppression of A. americanum nymphs decreased dramatically to below 25% by the conclusion of the trial. The results of this study demonstrated that preseason applications of bifenthrin can mitigate acarological risk of exposure to ticks throughout much of their spring peak activity period.
-
Precipitation and Temperature as Predictors of the Local Abundance of Ixodes scapularis (Acari: Ixodidae) Nymphs
Journal of medical entomology, 2009Co-Authors: Terry L Schulze, Robert A. Jordan, Christopher J. Schulze, Robert W HungAbstract:Populations of Ixodes scapularis Say nymphs were surveyed at a Lyme disease- endemic area for 8 consecutive yr (1998-2005) to characterize annual changes in abundance. Precipitation and temperature were also monitored over the period 1998-2004 to determine their potential value as predictors of tick abundance. Although both parameters showed annual variation, no statistical differences in the annual abundance of I. scapularis nymphs were observed over the 8-yr period. Our results suggest that precipitation and temperature were not predictive of the abundance of I. scapularis nymphs.
-
Efficacy of Granular Deltamethrin Against Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) Nymphs
Journal of medical entomology, 2001Co-Authors: Terry L Schulze, Robert W Hung, Daniel Markowski, Robert A. Jordan, R. Chadwick Taylor, Martin S ChomskyAbstract:A single barrier application of granular deltamethrin to the woodland edges of a forested residential community in late spring significantly reduced the abundance of Ixodes scapularis Say nymphs. The application also suppressed the population of Amblyomma americanum (L.) nymphs, which recently became established in the study area. The efficacy of deltamethrin is compared with other commonly used acaricides.
-
Effects of granular carbaryl application on sympatric populations of Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) nymphs.
Journal of medical entomology, 2000Co-Authors: Terry L Schulze, Robert A. Jordan, Robert W HungAbstract:A single application of granular carbaryl approaching the lowest recommended rate to the shrub layer of a forested area in late spring significantly reduced the abundance of Ixodes scapularis Say nymphs throughout their peak activity period, but had little effect on Amblyomma americanum L. nymphs. Factors influencing the efficacy of the application are discussed. The possible explanations for the lack of efficacy of granular carbaryl against A. americanum, including behavior, formulation, and application rate, are discussed.
-
suppression of subadult Ixodes scapularis acari ixodidae following removal of leaf litter
Journal of Medical Entomology, 1995Co-Authors: Terry L Schulze, Robert A. Jordan, Robert W HungAbstract:Removal of leaf litter in wooded areas of a forested residential community significantly reduced the abundance of questing blacklegged tick, Ixodes scapularis Say, nymphs throughout their peak activity period. Removal of leaf litter, using hand rakes and leaf blowers during the early spring (March) and early summer (June) resulted in reductions in nymphal tick density ranging from 72.7 to 100%. Subsequent sampling of the I. scapularis population during the summer revealed similar rates of suppression of larvae. Although leaf removal provides levels of suppression similar to more traditional methods, including chemical acaricides, it is labor intensive and not free of possible nontarget effects. The potential role of leaf litter removal in an integrated program to control I. scapularis is discussed.
Robert W Hung - One of the best experts on this subject based on the ideXlab platform.
-
Precipitation and Temperature as Predictors of the Local Abundance of Ixodes scapularis (Acari: Ixodidae) Nymphs
Journal of medical entomology, 2009Co-Authors: Terry L Schulze, Robert A. Jordan, Christopher J. Schulze, Robert W HungAbstract:Populations of Ixodes scapularis Say nymphs were surveyed at a Lyme disease- endemic area for 8 consecutive yr (1998-2005) to characterize annual changes in abundance. Precipitation and temperature were also monitored over the period 1998-2004 to determine their potential value as predictors of tick abundance. Although both parameters showed annual variation, no statistical differences in the annual abundance of I. scapularis nymphs were observed over the 8-yr period. Our results suggest that precipitation and temperature were not predictive of the abundance of I. scapularis nymphs.
-
prevalence of borrelia burgdorferi spirochaetales spirochaetaceae in Ixodes scapularis acari ixodidae adults in new jersey 2000 2001
Journal of Medical Entomology, 2003Co-Authors: Terry L Schulze, Robert W Hung, Rose S Puelle, Daniel Markowski, Robert Jordan, Martin S ChomskyAbstract:Abstract Using polymerase chain reaction, we analyzed 529 Ixodes scapularis Say adults collected from 16 of New Jersey’s 21 counties for the presence of Borrelia burgdorferi, the etiological agent of Lyme disease. Overall, 261 (49.3%) were positive. B. burgdorferi was detected in ticks obtained from each county and from 53 of the 58 (93.1%) municipalities surveyed. The observed statewide prevalence in New Jersey is similar to those reported from other northeastern and mid-Atlantic states.
-
Efficacy of Granular Deltamethrin Against Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) Nymphs
Journal of medical entomology, 2001Co-Authors: Terry L Schulze, Robert W Hung, Daniel Markowski, Robert A. Jordan, R. Chadwick Taylor, Martin S ChomskyAbstract:A single barrier application of granular deltamethrin to the woodland edges of a forested residential community in late spring significantly reduced the abundance of Ixodes scapularis Say nymphs. The application also suppressed the population of Amblyomma americanum (L.) nymphs, which recently became established in the study area. The efficacy of deltamethrin is compared with other commonly used acaricides.
-
Effects of granular carbaryl application on sympatric populations of Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) nymphs.
Journal of medical entomology, 2000Co-Authors: Terry L Schulze, Robert A. Jordan, Robert W HungAbstract:A single application of granular carbaryl approaching the lowest recommended rate to the shrub layer of a forested area in late spring significantly reduced the abundance of Ixodes scapularis Say nymphs throughout their peak activity period, but had little effect on Amblyomma americanum L. nymphs. Factors influencing the efficacy of the application are discussed. The possible explanations for the lack of efficacy of granular carbaryl against A. americanum, including behavior, formulation, and application rate, are discussed.
-
suppression of subadult Ixodes scapularis acari ixodidae following removal of leaf litter
Journal of Medical Entomology, 1995Co-Authors: Terry L Schulze, Robert A. Jordan, Robert W HungAbstract:Removal of leaf litter in wooded areas of a forested residential community significantly reduced the abundance of questing blacklegged tick, Ixodes scapularis Say, nymphs throughout their peak activity period. Removal of leaf litter, using hand rakes and leaf blowers during the early spring (March) and early summer (June) resulted in reductions in nymphal tick density ranging from 72.7 to 100%. Subsequent sampling of the I. scapularis population during the summer revealed similar rates of suppression of larvae. Although leaf removal provides levels of suppression similar to more traditional methods, including chemical acaricides, it is labor intensive and not free of possible nontarget effects. The potential role of leaf litter removal in an integrated program to control I. scapularis is discussed.
J. F. Carroll - One of the best experts on this subject based on the ideXlab platform.
-
Amblyomma americanum and Ixodes scapularis (Acari: Ixodidae) within the Capital Beltway and Associated Human Pathogens in Greenbelt National Park, Maryland (USA)
Journal of Entomological Science, 2020Co-Authors: J. F. Carroll, Myrna M. Miller, M KramerAbstract:Abstract Populations of host-seeking blacklegged tick, Ixodes scapularis (Say) and lone star tick, Amblyomma americanum (L.), nymphs were monitored at selected sites for 4 yr and at additional rand...
-
Elemol and amyris oil repel the ticks Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) in laboratory bioassays
Experimental and Applied Acarology, 2010Co-Authors: J. F. Carroll, G. Paluch, J. Coats, M KramerAbstract:The essential oil from Amyris balsamifera (Rutaceae) and elemol, a principal constituent of the essential oil of Osage orange, Maclura pomifera (Moraceae) were evaluated in in vitro and in vivo laboratory bioassays for repellent activity against host-seeking nymphs of the blacklegged tick, Ixodes scapularis , and the lone star tick, Amblyomma americanum . Both bioassays took advantage of the tendency of these host-seeking ticks to climb slender vertical surfaces. In one bioassay, the central portion of a vertical strip of filter paper was treated with test solution and ticks placed or allowed to crawl onto the untreated lower portion. In the other bioassay, a strip of organdy cloth treated with test solution was doubly wrapped (treatment on outer layer) around the middle phalanx of a forefinger and ticks released on the fingertip. Both amyris oil and elemol were repellent to both species of ticks. Elemol did not differ significantly in effectiveness against A. americanum from the widely used repellent deet. At 2 and 4 h after application to filter paper, 827 μg amyris oil/cm^2 paper repelled 80 and 55%, respectively, of A. americanum nymphs. Ixodes scapularis was repelled by lower concentrations of amyris oil and elemol than A. americanum .
-
Kairomonal activity of white-tailed deer metatarsal gland substances: a more sensitive behavioral bioassay using Ixodes scapularis (Acari: Ixodidae).
Journal of medical entomology, 1998Co-Authors: J. F. CarrollAbstract:A behavioral bioassay is described that detected kairomonal activity in substances associated with the metatarsal glands of white-tailed deer, Odocoileus virginianus (Zimmermann). Dry and aqueous wipes or rubs of glandular areas elicited an arrestant response in adult blacklegged ticks, Ixodes scapularis Say.
-
Occurrence of larval Ixodes scapularis (Acari:Ixodidae) on tree trunks.
Journal of medical entomology, 1996Co-Authors: J. F. CarrollAbstract:Host-seeking larvae of blacklegged ticks, Ixodes scapularis Say, were found on the trunks of 7 species of trees in a mixed deciduous woodland in Maryland. Where larvae were present around the bases of trees, larvae were found on 45.8% of the tree trucks. Almost 15% of the larvae found on tree trunks were approximately 1-2 m above the ground. Larger trees harbored larvae more often than smaller trees. Trees having a circumference at breast height of greater than or equal to 1 m (0.96 m diameter) averaged 3.19 larvae. Because white-footed mice, Peromyscus leucopus (Rafinesque), the principal hosts of I. scapularis larvae, frequently nest in trees, it may not be detrimental to host-seeking larvae to ascend and remain on tree trunks.
Robert F. Massung - One of the best experts on this subject based on the ideXlab platform.
-
Inoculation of white-tailed deer (Odocoileus virginianus) with Ap-V1 Or NY-18 strains of Anaplasma phagocytophilum and microscopic demonstration of Ap-V1 In Ixodes scapularis adults that acquired infection from deer as nymphs.
Vector borne and zoonotic diseases (Larchmont N.Y.), 2009Co-Authors: Mason V. Reichard, Jose De La Fuente, Raul Manzano Roman, Katherine M. Kocan, Edmour F. Blouin, Timothy A. Snider, Rebecca E. Heinz, Misti D. West, Susan E. Little, Robert F. MassungAbstract:Four white-tailed deer were inoculated with either the Ap-V1 or NY-18 strain of Anaplasma phagocytophilum. Ixodes scapularis nymphs were then allowed to acquistion feed on the inoculated deer and molt to adults. Only an Ap-V1 infected deer was infected persistently and able to infect nymphal Ixodes scapularis. Molted adult ticks maintained Ap-V1 infection as demonstrated by PCR and microscopy. We report, for the first time, a morphologic description of A. phagocytophilum in I. scapularis.
