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Optimizing Fire Blight (Erwinia amylovora) Management with New Technologies and an Integrated Approach
Optimizing Fire Blight (Erwinia amylovora) Management with New Technologies and an Integra...
Optimizing Fire Blight (Erwinia amylovora) Management with New Technologies and an Integrated Approach

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자료유형  
 학위논문 서양
최종처리일시  
20260202103208
ISBN  
9798283141909
DDC  
581
저자명  
Yannuzzi, Isabella Magna.
서명/저자  
Optimizing Fire Blight (Erwinia amylovora) Management with New Technologies and an Integrated Approach
발행사항  
[Sl] : Cornell University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
239 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Advisor: Cox, Kerik.
학위논문주기  
Thesis (Ph.D.)--Cornell University, 2025.
초록/해제  
요약In the United States, New York is the second largest apple producing state, generating an average of 29.5 million bushels each year. However, New York is also home to fire blight, a bacterial disease caused by the bacterium Erwinia amylovora. This disease can cause economic devastation and destroy entire plantings in a single growing season when environmental conditions favor disease development. The estimated annual losses due to fire blight, including management costs, have been estimated at over $100M USD. Fire blight management is further complicated by the presence of antibiotic-resistant populations of E. amylovora. As a graduate student, I conducted in vitro and field trials to determine the ways in which fire blight management can be optimized, and how new technologies incorporating UV-C can be implemented to best serve management efforts. We found field applications of UV-C at 200 J/m2 to be as effective at managing shoot blight as streptomycin, the leading antibiotic for fire blight management, and Aureobasidium pullulans, the leading biological for fire blight management. This finding is incredibly relevant as it provides an additional management practice for E. amylovora, capable of effectively managing bacterial populations with antibiotic resistance. We also determined the potential of UV-C applications to manage apple pests through in vitro studies with Aphis spiraecola where we found that UV-C exposure of 400 J/m2 significantly increased mortality and significantly decreased life stage advancement and fecundity across life stages. By evaluating 10 pruning programs in two orchards across two years, it was found that though pruning can be effective at managing disease in both high-density, and vertical-axis orchards, it has the greatest impact on disease management in larger trees grown in vertical-axis plantings. This finding is important as most modern orchards being planted are high-density. Given these results, it may be most efficient, in terms of time, labor, and cost, for the grower to remove and replant infected trees in high-density plantings. The research described in this dissertation contributes to our understanding of fire blight and sustainable disease management through the evaluation of new and existing management practices.
일반주제명  
Plant pathology
일반주제명  
Microbiology
일반주제명  
Plant sciences
키워드  
Apple
키워드  
Bacterial disease management
키워드  
Erwinia amylovora
키워드  
Integrated pest management
키워드  
Ultraviolet germicidal light
기타저자  
Cornell University Plant Pathology and Plant-Microbe Biology
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aYannuzzi,  Isabella  Magna.▼0(orcid)0009-0005-6886-3798
■24510▼aOptimizing  Fire  Blight  (Erwinia  amylovora)  Management  with  New  Technologies  and  an  Integrated  Approach
■260    ▼a[Sl]▼bCornell  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a239  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aAdvisor:  Cox,  Kerik.
■5021  ▼aThesis  (Ph.D.)--Cornell  University,  2025.
■520    ▼aIn  the  United  States,  New  York  is  the  second  largest  apple  producing  state,  generating  an  average  of  29.5  million  bushels  each  year.  However,  New  York  is  also  home  to  fire  blight,  a  bacterial  disease  caused  by  the  bacterium  Erwinia  amylovora.  This  disease  can  cause  economic  devastation  and  destroy  entire  plantings  in  a  single  growing  season  when  environmental  conditions  favor  disease  development.  The  estimated  annual  losses  due  to  fire  blight,  including  management  costs,  have  been  estimated  at  over  $100M  USD.  Fire  blight  management  is  further  complicated  by  the  presence  of  antibiotic-resistant  populations  of  E.  amylovora.  As  a  graduate  student,  I  conducted  in  vitro  and  field  trials  to  determine  the  ways  in  which  fire  blight  management  can  be  optimized,  and  how  new  technologies  incorporating  UV-C  can  be  implemented  to  best  serve  management  efforts.  We  found  field  applications  of  UV-C  at  200  J/m2  to  be  as  effective  at  managing  shoot  blight  as  streptomycin,  the  leading  antibiotic  for  fire  blight  management,  and  Aureobasidium  pullulans,  the  leading  biological  for  fire  blight  management.  This  finding  is  incredibly  relevant  as  it  provides  an  additional  management  practice  for  E.  amylovora,  capable  of  effectively  managing  bacterial  populations  with  antibiotic  resistance.  We  also  determined  the  potential  of  UV-C  applications  to  manage  apple  pests  through  in  vitro  studies  with  Aphis  spiraecola  where  we  found  that  UV-C  exposure  of  400  J/m2  significantly  increased  mortality  and  significantly  decreased  life  stage  advancement  and  fecundity  across  life  stages.  By  evaluating  10  pruning  programs  in  two  orchards  across  two  years,  it  was  found  that  though  pruning  can  be  effective  at  managing  disease  in  both  high-density,  and  vertical-axis  orchards,  it  has  the  greatest  impact  on  disease  management  in  larger  trees  grown  in  vertical-axis  plantings.  This  finding  is  important  as  most  modern  orchards  being  planted  are  high-density.  Given  these  results,  it  may  be  most  efficient,  in  terms  of  time,  labor,  and  cost,  for  the  grower  to  remove  and  replant  infected  trees  in  high-density  plantings.  The  research  described  in  this  dissertation  contributes  to  our  understanding  of  fire  blight  and  sustainable  disease  management  through  the  evaluation  of  new  and  existing  management  practices.
■590    ▼aSchool  code:  0058.
■650  4▼aPlant  pathology
■650  4▼aMicrobiology
■650  4▼aPlant  sciences
■653    ▼aApple
■653    ▼aBacterial  disease  management
■653    ▼aErwinia  amylovora
■653    ▼aIntegrated  pest  management
■653    ▼aUltraviolet  germicidal  light
■690    ▼a0480
■690    ▼a0410
■690    ▼a0479
■71020▼aCornell  University▼bPlant  Pathology  and  Plant-Microbe  Biology.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0058
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357327▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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