Plant Health Progress最新文献_第9页

First Report of Phytophthora nicotianae causing leaf necrosis on Magnolia ‘Butterflies’ in a Virginia ornamental plant nursery 弗吉尼亚观赏植物苗圃中引起白玉兰“蝴蝶”叶片坏死的烟草疫霉初报

IF 2.3

Plant Health Progress Pub Date : 2022-12-19 DOI: 10.1094/php-10-22-0114-br

Devin Bily, Beth McClelland

引用次数: 0

A survey of soybean cyst nematode population densities and phenotypes in Illinois: 2018 and 2020 2018年和2020年伊利诺伊州大豆囊线虫种群密度和表型调查

IF 2.3

Plant Health Progress Pub Date : 2022-12-08 DOI: 10.1094/php-09-22-0092-s

N. Kleczewski, A. L. Colgrove, C. Harbach, N. D. Bowman, D. Plewa

{"title":"A survey of soybean cyst nematode population densities and phenotypes in Illinois: 2018 and 2020","authors":"N. Kleczewski, A. L. Colgrove, C. Harbach, N. D. Bowman, D. Plewa","doi":"10.1094/php-09-22-0092-s","DOIUrl":"https://doi.org/10.1094/php-09-22-0092-s","url":null,"abstract":"In Illinois, Soybean cyst nematode (SCN: Heterodera glycines), was estimated to cause over 15 million $U.S. in losses as recently as 2021. In addition, populations of SCN insensitive to PI88788 derived resistance, the most commonly used SCN resistance source in commercially available soybeans, continues to increase. Despite this, awareness of this pathogen and its current status in the state are relatively lacking. A survey was conducted in 2018 and 2020 to assess the presence, abundance, and virulence phenotypes of SCN in Illinois soybean fields. Soil samples were collected and processed for SCN eggs after harvest each year and samples exceeding threshold values of SCN eggs were virulence tested using the Hg type test. A total of 95 samples were collected, representing 46 counties. Eighty seven percent of fields sampled contained SCN eggs, with 38% containing population densities over 2,000 eggs /100 cm3. All samples included in the Hg type test had a female index >10 on indicator line PI88788, indicating insensitivity to this resistance source. Extrapolated across soybean production acres, these data indicate that approximately 4.4 million acres of soybeans contain levels of SCN requiring SCN management and over 54% of acres using cultivars derived from PI88788 are not fully protected from this pathogen.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47920735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eggplant Fruit Periderm Firmness Correlated with Resistance to Phytophthora nicotianae 茄子果实表皮硬度与烟草疫病抗性的相关性研究

IF 2.3

Plant Health Progress Pub Date : 2022-12-05 DOI: 10.1094/php-07-22-0067-rs

A. Keinath

{"title":"Eggplant Fruit Periderm Firmness Correlated with Resistance to Phytophthora nicotianae","authors":"A. Keinath","doi":"10.1094/php-07-22-0067-rs","DOIUrl":"https://doi.org/10.1094/php-07-22-0067-rs","url":null,"abstract":"Based on worldwide reports, Phytophthora nicotianae and Pythium aphanidermatum are the Phytophthora and Pythium species most frequently reported on eggplant (Solanum melongena). Both species were identified on fruit of several eggplant cultivars grown in Charleston, SC, in spring 2018. The objective of this study was to determine if seven cultivars, each representing a different fruit type, differed in susceptibility to Phytophthora nicotianae and if periderm or flesh firmness or fruit density was associated with differences. Eggplant fruit were inoculated with colonized agar plugs and incubated 4 days at high relative humidity. Japanese eggplant cv. Millionaire had a greater incidence of fruit infection, wider lesion diameter, and a greater percentage of lesion area with pathogen growth than six other cultivars. Patio Baby, an Indian type, and Fairy Tale, a graffiti type, had the lowest incidence compared to the other five cultivars and no pathogen growth in lesions. Periderm firmness was negatively correlated with incidence, lesion diameter, and diameter of pathogen growth within lesions (P ≤ 0.01). The significant correlations of lesion size with the size of pathogen growth suggest that the same characteristics that limit lesion expansion, e. g., some aspect of periderm firmness, also may limit mycelial growth and sporangial production. Growers may need to apply oomycete-specific fungicides registered on eggplant more frequently to Japanese cultivars than to cultivars that produce graffiti or Indian type fruit.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46769799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A diagnostic guide for myrtle rust 桃金娘锈病诊断指南

IF 2.3

Plant Health Progress Pub Date : 2022-11-30 DOI: 10.1094/php-06-22-0057-dg

T. Boufleur, João Vitor Pelizzaro Morales, Túlio V. Martins, Manoel Penachio Gonçalves, N. S. Massola, L. Amorim

引用次数: 2

Foliar phosphate applications influence organic acid composition in the citrus phloem and could reduce HLB disease by limiting CLas titers 叶面施磷肥影响柑橘韧皮部有机酸组成，并可通过限制CLas滴度来减少HLB病

IF 2.3

Plant Health Progress Pub Date : 2022-11-30 DOI: 10.1094/php-05-22-0044-rs

Paula Rios Glusberger, Joseph R. Petrone, Alam Muñoz-Beristain, A. Guha, C. Vincent, Jinyun Li, Nian Wang, N. Killiny, E. Triplett

{"title":"Foliar phosphate applications influence organic acid composition in the citrus phloem and could reduce HLB disease by limiting CLas titers","authors":"Paula Rios Glusberger, Joseph R. Petrone, Alam Muñoz-Beristain, A. Guha, C. Vincent, Jinyun Li, Nian Wang, N. Killiny, E. Triplett","doi":"10.1094/php-05-22-0044-rs","DOIUrl":"https://doi.org/10.1094/php-05-22-0044-rs","url":null,"abstract":"Citrus greening disease is now completely endemic to Florida citrus trees, having spread rapidly across all counties in the past 20 years and causing devastating economic losses. The disease’s etiological agent is the phloem-restricted bacterium, Candidatus Liberibacter asiaticus (CLas). Liberibacter crescens, the closest culturable relative, was discovered to prefer citrate as its most effective carbon and energy source. Citrus plants load free-citrate in response to phosphorus deficiency. In Florida’s calcareous soils, supplemental phosphate fertilization is very low due to the assumption that it is readily available for plants through the soil. It is likely that citrus trees are loading citrate to mine phosphorus from the soil, which could inadvertently exacerbate CLas infection. In greenhouse experiments, foliar sprayed phosphate is taken up by the plants, resulting in decreased free-citrate levels and changes in fumaric and succinic acids in the phloem, in addition to delaying titer detection of CLas. Our field experiments - where mature trees have a well-established HLB infection that’s maintained by infected psyllids – exhibited lower CLas titer for some of the phosphate treatments across time.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49177755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First report of smoketree rust, caused by Pileolaria cotini-coggygriae, in the Midwest USA 美国中西部首次报道由烟树锈病引起的烟树锈病

IF 2.3

Plant Health Progress Pub Date : 2022-11-28 DOI: 10.1094/php-08-22-0080-br

Patricia Kaishian, T. Creswell, J. Bonkowski, C. Aimé

引用次数: 0

In vitro fungicide sensitivity and effect of organic matter concentration on fungicide bioavailability in take-all root rot pathogens isolated from North Carolina 北卡罗来纳州全根腐病病原菌对杀菌剂的体外敏感性及有机物浓度对杀菌剂生物利用度的影响

IF 2.3

Plant Health Progress Pub Date : 2022-11-25 DOI: 10.1094/php-08-22-0072-rs

Cameron M. Stephens, T. Gannon, L. Thiessen, M. Cubeta, J. Kerns

{"title":"In vitro fungicide sensitivity and effect of organic matter concentration on fungicide bioavailability in take-all root rot pathogens isolated from North Carolina","authors":"Cameron M. Stephens, T. Gannon, L. Thiessen, M. Cubeta, J. Kerns","doi":"10.1094/php-08-22-0072-rs","DOIUrl":"https://doi.org/10.1094/php-08-22-0072-rs","url":null,"abstract":"Take-all root rot (TARR) of ultradwarf bermudagrass is caused by Gaeumannomyces graminis (Gg), Gaeumannomyces graminicola (Ggram), Candidacolonium cynodontis (Cc), and Magnaporthiopsis cynodontis (Mc). Multiple pathogens have recently been associated with this disease and biological parameters such as fungicide sensitivity have not been explored in ultradwarf bermudagrass. While fungicides are commonly used to mitigate disease development, high organic matter present in the turfgrass system may limit the bioavailability of fungicides. Fungicide bioavailability may be influenced by organic matter concentration and physicochemical properties of fungicides may provide insight into their binding affinity. However, the influence of organic matter content on fungicide bioavailability has not been investigated. Therefore, the in vitro sensitivity of Gg, Ggram, Cc, and Mc to 14 different fungicides across three chemical classes was determined. An in vitro bioavailability assay was developed using three fungicides and three organic matter concentrations. Generally, DMI and QoI fungicides provided the greatest reduction in mycelial growth whereas the SDHIs did not reduce mycelial growth. These data can serve as a foundation for TARR pathogen sensitivity to inform in vitro fungicide sensitivity studies and field efficacy trials. Pyraclostrobin and propiconazole have a high affinity to bind to organic matter which was evident as more fungicide was required to inhibit Gg growth as organic matter concentration increased. This was not observed when evaluating azoxystrobin, which has a lower binding affinity. Understanding how TARR pathogens respond to fungicide in vitro and how organic matter concentration affects in vitro sensitivity will improve fungicide selection for management of TARR.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42093104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of elemental sulfur products as tank mix partners with azoxystrobin for management of late leaf spot (Nothopassalora personata) of peanut 元素硫产品与嘧菌酯复配治理花生晚叶斑病的比较

IF 2.3

Plant Health Progress Pub Date : 2022-11-21 DOI: 10.1094/php-08-22-0077-rs

A. Culbreath, T. Brenneman, R. Kemerait, E. Cantonwine

{"title":"Comparison of elemental sulfur products as tank mix partners with azoxystrobin for management of late leaf spot (Nothopassalora personata) of peanut","authors":"A. Culbreath, T. Brenneman, R. Kemerait, E. Cantonwine","doi":"10.1094/php-08-22-0077-rs","DOIUrl":"https://doi.org/10.1094/php-08-22-0077-rs","url":null,"abstract":"Management of fungicide resistance in Nothopassalora personata, the cause of late leaf spot of peanut (Arachis hypogaea), is a challenge in peanut production areas of the southeastern United States. Field experiments were conducted in Tifton, GA in 2020 and 2021, and in Plains, GA in 2021 to determine the effects of mixtures of seven elemental sulfur fungicide products with the QoI fungicide azoxystrobin on late leaf spot in fields where QoI-resistant populations of N. personata are suspected. Application of azoxystrobin or sulfur alone had little reduction in on standardized area under the disease progress curve (SAUDPC) or final disease intensity ratings compared to the nontreated control. However, mixtures of azoxystrobin with all micronized sulfur products evaluated had SAUDPC values and final disease intensity ratings lower less than those in the azoxystrobin alone or Microthiol Disperss 80W sulfur alone. One non-micronized sulfur formulation had SAUDPC values and final intensity ratings similar to those of azoxystrobin or Microthiol Disperss 80W sulfur alone. The results suggest multiple micronized elemental sulfur products have potential for use as mixing partners with azoxystrobin leaf spot control in fields where the efficacy of azoxystrobin alone is not adequate.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46718011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Emerging Fusarium spp. causing Head Blight on Hemp in Kentucky 肯塔基州新出现的镰刀菌引起大麻枯萎病

IF 2.3

Plant Health Progress Pub Date : 2022-11-19 DOI: 10.1094/php-09-22-0089-sc

Henry S. Smith, D. Szarka, E. Dixon, Oluwatoni Adedokun, M. Munir, Magdalena Ricciardi, Rebecca Schroer, N. Gauthier

引用次数: 1

Alternative management strategies and impact of the northern root-knot nematode in daylily production 北方根结线虫在日光浴生产中的替代管理策略及影响

IF 2.3

Plant Health Progress Pub Date : 2022-11-10 DOI: 10.1094/php-08-22-0076-rs

Amanda D. Howland, E. Cole, K. Poley, M. Quintanilla

{"title":"Alternative management strategies and impact of the northern root-knot nematode in daylily production","authors":"Amanda D. Howland, E. Cole, K. Poley, M. Quintanilla","doi":"10.1094/php-08-22-0076-rs","DOIUrl":"https://doi.org/10.1094/php-08-22-0076-rs","url":null,"abstract":"Bare-root production of Hemerocallis spp., daylily, is of major economic importance to Michigan’s ornamental industry but production of clean nursery material is challenging due to plant-parasitic nematodes. The northern root-knot nematode, Meloidogyne hapla, is the most important perennial ornamental pathogen in northern North America; it causes over 20% yield loss in Hemerocallis spp. production and reduces marketability and distribution. A field trial was established in 2018-2020 at a Michigan commercial nursery to determine effective and long-term management strategies to reduce nematode population levels. Eleven treatments were tested: a control, four bio-nematicides, two nematicides, a nematicide root dip, and three compost blends. Soil samples were taken three times/year along with annual root samples and plant height measurements. Results indicated that TerraClean 5.0 (hydrogen peroxide) and Majestene 304 (Chromobacterium subtsugae) nematicides best controlled M. hapla populations by 49% and 37%, respectively, compared to the control, while Indemnify (fluopyram) significantly increased plant biomass and yields by 31%. A greenhouse study was conducted to determine the impact of M. hapla on Hemerocallis spp. production by inoculating daylily with varying nematode inoculation densities. Even at low population levels, plant biomass reductions were observed and M. hapla was able to readily reproduce on Hemerocallis spp. These experiments highlight the importance of managing M. hapla and provides effective, alternative management methods that can reduce the application of fumigants and prevent yield losses to increase profitability for ornamentals.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49402871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0