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A Systems Approach to Soilborne Pathogen Management of Hemp and Tomato
A Systems Approach to Soilborne Pathogen Management of Hemp and Tomato
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105638
- ISBN
- 9798273307971
- DDC
- 581
- 서명/저자
- A Systems Approach to Soilborne Pathogen Management of Hemp and Tomato
- 발행사항
- [Sl] : Cornell University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 163 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-07, Section: B.
- 주기사항
- Advisor: Smart, Christine.
- 학위논문주기
- Thesis (Ph.D.)--Cornell University, 2025.
- 초록/해제
- 요약Fungal and oomycete soilborne pathogens cause crown rot, root rot, vascular wilt, damping-off, and fruit rot on many crops. Here, I study multiple angles of soilborne pathogens on hemp and tomato in an effort to enhance management strategies for growers and to better understand host characteristics leading to infection. Fusarium spp. and Pythium spp. can cause damping-off, leading to poor stand establishment in direct seeded hemp and reduced germination in the greenhouse. Fungicide seed treatments were evaluated in an inoculated greenhouse experiment and on direct-seeded fiber hemp in field experiments to determine whether they prevent damping-off, increase stand count, and impact yield. Seed treated with copper hydroxide products Ultim-ST and Americop, as well as phosphite-based Prudent 44 / Nutrol had greater stand counts three- and sixweeks post-planting, but no significant differences were observed at harvest. The seed treatments did not significantly increase the percentage of healthy seedlings when inoculated with Pythium myriotylum or Pythium ultimum. I additionally evaluated whether biostimulants can enhance hemp growth under reduced nitrogen (N) fertigation. First, a gradient of N fertility rates was first evaluated. Hemp displayed N deficiency symptoms when fertigated with 53 ppm N and maximum growth was observed at 263 ppm N. Hemp treated with Double Nickel LC or RootShield Plus WP had no significant differences in height, biomass, or leaf SPAD values compared to nontreated hemp when fertigated with either 53 or 263 ppm N. In a separate set of experiments, the impact of disrupting expression of cutin related genes CUTIN SYNTHASE 1 (CUS1) and CUTICLE DESTRUCTING FACTOR 1 (CDEF1) in tomato was studied on the host's susceptibility to Phytophthora fruit rot. Significantly larger lesion sizes were recorded on cus1 and cus1xcdef1 mutant fruit inoculated with Phytophthora capsici than inoculated 'M82' WT and cdef1 mutant fruit. Microscopy provided evidence of faster cuticle penetration by P. capsici in cus1 fruit. The results of these studies are intended to inform disease management and direct future studies in understanding pathogen colonization in relation to cuticle formation.
- 일반주제명
- Plant pathology
- 일반주제명
- Horticulture
- 일반주제명
- Microbiology
- 키워드
- Biostimulants
- 키워드
- Seed treatment
- 키워드
- Tomato
- 기타저자
- Cornell University Plant Pathology and Plant-Microbe Biology
- 기본자료저록
- Dissertations Abstracts International. 87-07B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105638
■006m o d
■007cr#unu||||||||
■020 ▼a9798273307971
■035 ▼a(MiAaPQ)AAI32395731
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a581
■1001 ▼aMcMullen, Patrick William.
■24512▼aA Systems Approach to Soilborne Pathogen Management of Hemp and Tomato
■260 ▼a[Sl]▼bCornell University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a163 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-07, Section: B.
■500 ▼aAdvisor: Smart, Christine.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2025.
■520 ▼aFungal and oomycete soilborne pathogens cause crown rot, root rot, vascular wilt, damping-off, and fruit rot on many crops. Here, I study multiple angles of soilborne pathogens on hemp and tomato in an effort to enhance management strategies for growers and to better understand host characteristics leading to infection. Fusarium spp. and Pythium spp. can cause damping-off, leading to poor stand establishment in direct seeded hemp and reduced germination in the greenhouse. Fungicide seed treatments were evaluated in an inoculated greenhouse experiment and on direct-seeded fiber hemp in field experiments to determine whether they prevent damping-off, increase stand count, and impact yield. Seed treated with copper hydroxide products Ultim-ST and Americop, as well as phosphite-based Prudent 44 / Nutrol had greater stand counts three- and sixweeks post-planting, but no significant differences were observed at harvest. The seed treatments did not significantly increase the percentage of healthy seedlings when inoculated with Pythium myriotylum or Pythium ultimum. I additionally evaluated whether biostimulants can enhance hemp growth under reduced nitrogen (N) fertigation. First, a gradient of N fertility rates was first evaluated. Hemp displayed N deficiency symptoms when fertigated with 53 ppm N and maximum growth was observed at 263 ppm N. Hemp treated with Double Nickel LC or RootShield Plus WP had no significant differences in height, biomass, or leaf SPAD values compared to nontreated hemp when fertigated with either 53 or 263 ppm N. In a separate set of experiments, the impact of disrupting expression of cutin related genes CUTIN SYNTHASE 1 (CUS1) and CUTICLE DESTRUCTING FACTOR 1 (CDEF1) in tomato was studied on the host's susceptibility to Phytophthora fruit rot. Significantly larger lesion sizes were recorded on cus1 and cus1xcdef1 mutant fruit inoculated with Phytophthora capsici than inoculated 'M82' WT and cdef1 mutant fruit. Microscopy provided evidence of faster cuticle penetration by P. capsici in cus1 fruit. The results of these studies are intended to inform disease management and direct future studies in understanding pathogen colonization in relation to cuticle formation.
■590 ▼aSchool code: 0058.
■650 4▼aPlant pathology
■650 4▼aHorticulture
■650 4▼aMicrobiology
■653 ▼aBiostimulants
■653 ▼aPhytophthora capsici
■653 ▼aPythium myriotylum
■653 ▼aSeed treatment
■653 ▼aTomato
■690 ▼a0480
■690 ▼a0471
■690 ▼a0410
■71020▼aCornell University▼bPlant Pathology and Plant-Microbe Biology.
■7730 ▼tDissertations Abstracts International▼g87-07B.
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360920▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


