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Dispersal and population dynamics of Amblyseius womersleyi Schicha(Acari:Phytoseiidae) and Tetranychus urticae Koch(Acari:Tetranychidae) in apple orchards
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- Authors
- Advisor
- 이준호
- Issue Date
- 2004
- Publisher
- 서울대학교 대학원
- Keywords
- 점박이응애 ; Tetranychus urticae ; 긴털이리응애 ; Amblyseius womersleyi ; 분산 ; Dispersal ; 휴면 ; Diapause ; 월동처 ; Overwintering sites
- Description
- Thesis (master`s)--서울대학교 대학원 :농생명공학부,2004.
- Abstract
- Study was conducted to determine dispersal pattern of Tetranychus urticae Koch and Amblyseius
womersleyi Schicha in the orchard in early, mid-, and late season, and determine diapause
induction conditions for A. womersleyi, and elucidate the overwintering sites of various mites
including T. urticae and A. womersleyi in apple and pear orchards in 2002 and 2003.
Overwintered adult T. urticae movement from the tree trunk to the ground mostly occurred from
late March to mid-April with a daily peak activity from noon to 4 p.m. Movement of overwintered
A. womersleyi was not found from the tree trunk to the ground. T. urticae began to move from
the ground vegetation to the tree canopy via trunk from early May, and A. womersleyi began to
move to the tree canopy via trunk from early June. In 2002 when populations of T. urticae and A.
womersleyi were high in the tree canopy, downward ambulatory movement of T. urticae from the
canopy began to occur from late May while that of A. womersleyi occurred from late June. In
2003 when populations of T. urticae and A. womersleyi were low in the tree canopy, significant
downward movements occurred much later (early July and late July, respectively). On the tree
canopy peak densities of T. urticae and A. womersleyi occurred in mid-late July and late July,
respectively in 2002, and in early July and late July, respectively in 2003. Thus, A.
womersleyi population followed the T. urticae population 1-3 weeks behind. Since the times of
peak populations of T. urticae and A. womersleyi significant aerial movement as well as downward
movement of both species were detected.
- Language
- English
- URI
- http://dcollection.snu.ac.kr:80/jsp/common/DcLoOrgPer.jsp?sItemId=000000055636
https://hdl.handle.net/10371/67585
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