東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Interaction of an entomopathogenic f...

Flor, Lina Buscano.

Linked to FindBook

Google Book

Amazon

博客來

Interaction of an entomopathogenic fungus and black-legged ticks, Ixodes scapularis (Say) (Acari: Ixodidae).

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Interaction of an entomopathogenic fungus and black-legged ticks, Ixodes scapularis (Say) (Acari: Ixodidae)./
Author:	Flor, Lina Buscano.
Description:	182 p.
Notes:	Adviser: Timothy J. Kurtti.
Contained By:	Dissertation Abstracts International67-07B.
Subject:	Biology, Entomology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3225733
ISBN:	9780542793615

Interaction of an entomopathogenic fungus and black-legged ticks, Ixodes scapularis (Say) (Acari: Ixodidae).
Flor, Lina Buscano.

Interaction of an entomopathogenic fungus and black-legged ticks, Ixodes scapularis (Say) (Acari: Ixodidae). - 182 p.

Adviser: Timothy J. Kurtti.

Thesis (Ph.D.)--University of Minnesota, 2006.

I isolated a fungus from a female black-legged tick, Ixodes scapularis , from a white tailed deer. The isolate (SCIs3-2) was a Beauveria species that formed white colonies and turned creamy when mature. The fungus bore clustered flask-shaped conidiophores. The optimum temperature was 25°C with a maximum mean radial growth rate of 3.3 +/- 0.05 mm/day and a 97% germination rate. Phylogenetic analyses of the ITS and EF1-alpha sequences showed SCIs3-2 as Beauveria cf. bassiana, a species closely related to, but distinct from, B. bassiana sensu stricto.

ISBN: 9780542793615Subjects--Topical Terms:

1018619
Biology, Entomology.

Interaction of an entomopathogenic fungus and black-legged ticks, Ixodes scapularis (Say) (Acari: Ixodidae).
LDR:03042nam 2200277 a 45 001 964055
005 20110901
008 110901s2006 eng d
020 $a 9780542793615
035 $a (UMI)AAI3225733
035 $a AAI3225733
040 $a UMI $c UMI
100 1 $a Flor, Lina Buscano. $3 1287126
245 1 0 $a Interaction of an entomopathogenic fungus and black-legged ticks, Ixodes scapularis (Say) (Acari: Ixodidae).
300 $a 182 p.
500 $a Adviser: Timothy J. Kurtti.
500 $a Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 3561.
502 $a Thesis (Ph.D.)--University of Minnesota, 2006.
520 $a I isolated a fungus from a female black-legged tick, Ixodes scapularis , from a white tailed deer. The isolate (SCIs3-2) was a Beauveria species that formed white colonies and turned creamy when mature. The fungus bore clustered flask-shaped conidiophores. The optimum temperature was 25°C with a maximum mean radial growth rate of 3.3 +/- 0.05 mm/day and a 97% germination rate. Phylogenetic analyses of the ITS and EF1-alpha sequences showed SCIs3-2 as Beauveria cf. bassiana, a species closely related to, but distinct from, B. bassiana sensu stricto.
520 $a SCIs3-2 conidia adhered immediately to tick cuticle and germinated 24 to 48 hours post challenge. Conidia had low germination rates, ranging from 2% to 12% germination on different areas of the tick's body. Development of the germ tube was slow but penetration of the fungus into the tick's hard cuticle, intersegmental membrane of legs and natural openings was observed. Internal infection was evident 10 to 14 days post challenge. The fungus grew out of the tick's cuticle, producing conidia on surface of the cadaver. The cuticle proved to be the main barrier for fungal infection delaying disease initiation and mortality of I. scapularis ticks. The susceptibility of larvae and nymphs was dependent on age, instar and whether ticks were engorged or unfed. Survival of 6-7 week old unfed larvae four weeks after treatment was 20% (SEM +/- 10.4%) and when larvae were older (15-16 weeks post eclosion) survival after four weeks was 80% (+/- 8.0%). Engorged larvae treated 2-3 days post repletion (PR) were more susceptible (20% +/- 2.9% survival) to infection by conidia than engorged larvae treated 23 days PR. Development of SCIs3-2 in unfed nymphs was slow and there was an apparent delay in mortality. Old unfed nymphs were more susceptible to infection than middle-aged and young unfed nymphs. The isolate caused a significant decline in survival of larvae and nymphs over time. The developmental stage, timing of treatment, molting cycle and a blood meal will be critical factors to consider in the use of B. cf. bassiana to control I. scapularis in the field.
590 $a School code: 0130.
650 4 $a Biology, Entomology. $3 1018619
690 $a 0353
710 2 0 $a University of Minnesota. $3 676231
773 0 $t Dissertation Abstracts International $g 67-07B.
790 $a 0130
790 1 0 $a Kurtti, Timothy J., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3225733