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Fusarium species recovered from postharvest hemp materials from Kentucky fields 从肯塔基州收获后的大麻材料中发现镰刀菌
IF 2.3
Plant Health Progress Pub Date : 2023-07-10 DOI: 10.1094/php-06-23-0054-rs
D. Szarka, Henry S. Smith, E. Dixon, M. Munir, M. Rahnama, N. Gauthier
{"title":"Fusarium species recovered from postharvest hemp materials from Kentucky fields","authors":"D. Szarka, Henry S. Smith, E. Dixon, M. Munir, M. Rahnama, N. Gauthier","doi":"10.1094/php-06-23-0054-rs","DOIUrl":"https://doi.org/10.1094/php-06-23-0054-rs","url":null,"abstract":"As hemp becomes established as a commodity in the U.S., continued cultivation demands a greater understanding of the pathogens that affect the consumable portions such as flowers and grain. Four Fusarium spp. have been confirmed to cause Fusarium head blight on hemp in Kentucky. Several Fusarium species, including F. graminearum, that are known to produce mycotoxins have been confirmed pathogenic on hemp. Fusarium mycotoxins are regulated in grains used for human and animal consumption. Determining which Fusarium species infect hemp is the first step to producing safe material. While field disease is under investigation, there have been no studies regarding stored hemp. Harvested and stored floral material for production of cannabidiol (CBD) were collected from seven Kentucky producers from 2019 and 2020 harvests. Material was screened using a Fusarium-selective medium and DNA sequencing. At least 12 different species were isolated, most from the Incarnatum-equiseti species complex (75.6%). Species from the Sambucinum (16.3%), Oxysporum (0.8%), Fujikuroi (5.7%), and Solani (1.6%) species complexes were also identified. Additional research is essential to determine whether these Fusarium species are pathogenic or saprophytic, and if they can produce toxins dangerous for humans and animals. Such information is crucial to determine how to store hemp, manage infected material, and promote successful production of hemp products.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48282102","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
Impact of fungicides on dual-purpose and brown midrib Zea mays hybrids used for silage in Wisconsin 杀菌剂对威斯康星州用于青贮饲料的玉米-玉米两用和褐色杂交种的影响
IF 2.3
Plant Health Progress Pub Date : 2023-07-10 DOI: 10.1094/php-04-23-0036-rs
M. Chibuogwu, B. Mueller, C. Groves, Damon L. Smith
{"title":"Impact of fungicides on dual-purpose and brown midrib Zea mays hybrids used for silage in Wisconsin","authors":"M. Chibuogwu, B. Mueller, C. Groves, Damon L. Smith","doi":"10.1094/php-04-23-0036-rs","DOIUrl":"https://doi.org/10.1094/php-04-23-0036-rs","url":null,"abstract":"Decisions about hybrid choice and fungicide application when growing corn (Zea mays L.) for silage are important considerations to maximize sustainable production. The objective of the research was to evaluate how brown midrib (BMR) hybrids compare to dual-purpose hybrids and how fungicides interact with these two classes of corn hybrids. To explore this, field research trials were conducted in Arlington, Wisconsin, in 2020 and 2021. In both years, the trials were arranged in a randomized complete block design and included one brown midrib hybrid, one dual-purpose hybrid, and seven fungicide application regimes. In-field disease rating was done for tar spot (caused by Phyllachora maydis), ear rot and stalk rot (caused by Gibberella zeae). Harvested silage was analyzed for yield, quality, and deoxynivalenol (DON) concentration. The selection of hybrid significantly (P < 0.01) influenced the silage quality parameters like starch and total tract neutral detergent fiber digestibility (TTNDFD), a measure of fiber digested throughout the tract of a cow. Fungicide use influenced dry matter yield (P < 0.05), tar spot severity (P < 0.01), and deoxynivalenol concentration (P = 0.05). Our findings suggest that using appropriate fungicides improves yield and reduces disease severity and DON contamination. Better quality silage could be obtained from BMR hybrids at the expense of yield. Therefore, Wisconsin farmers are encouraged to primarily utilize a dual-purpose class of corn hybrids to ensure optimal milk production and secondarily apply fungicides to reduce DON levels in corn chopped for silage.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46857141","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 Cockscomb Root Rot Caused by Fusarium solani in Iraq 伊拉克鸡冠根部腐病枯萎病初报
IF 2.3
Plant Health Progress Pub Date : 2023-07-03 DOI: 10.1094/php-05-23-0048-br
Safa J. Shehan, R. G. Abdalmoohsin, Z. M. A. Jeddoa, A. Lahuf
{"title":"First Report of Cockscomb Root Rot Caused by Fusarium solani in Iraq","authors":"Safa J. Shehan, R. G. Abdalmoohsin, Z. M. A. Jeddoa, A. Lahuf","doi":"10.1094/php-05-23-0048-br","DOIUrl":"https://doi.org/10.1094/php-05-23-0048-br","url":null,"abstract":"Cockscomb (Celosia argentea L.) is one of the most important ornamental plants in Iraq. In August 2021, severe root rot of cockscomb plants was observed with an incidence of 30% in all of the nurseries surveyed in Karbala and Babylon Provinces, Iraq. The symptoms appeared as severe leaf chlorosis and wilting with brown discoloration of the stem vascular bundle associated with dark brown lesions on the root that extended to the root collar and became extensive rot. Morphological features of 50% of the fungal colonies were identical and similar to Fusarium spp. The internal transcribed spacer, translation elongation factor, RNA polymerase I, and II, beta-tubulin 1, and the mitochondrial small-subunit ribosomal RNA genes were amplified, and sequenced. BLASTn analysis of these genetic marker’s sequences exhibited 99.84 to 100 % similarity with the corresponding global sequences of the Fusarium solani (Mart.). This identification was confirmed by the phylogenetic analysis of the concatenated sequences of the genetic markers. Although F. solani has caused economic damage to a broad range of commercially important plants in Iraq, to our knowledge, this is the first report of F. solani causing root rot of Cockscomb (C. argentea) in Iraq.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61309964","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
Distribution and incidence of watermelon crinkle leaf-associated virus 1, watermelon crinkle leaf-associated virus 2, and other viruses in cucurbits in South Florida 西瓜皱叶病毒1、西瓜皱叶病毒2和其他病毒在南佛罗里达葫芦中的分布和发病率
IF 2.3
Plant Health Progress Pub Date : 2023-06-22 DOI: 10.1094/php-02-23-0014-s
K. Hendricks, P. Roberts
{"title":"Distribution and incidence of watermelon crinkle leaf-associated virus 1, watermelon crinkle leaf-associated virus 2, and other viruses in cucurbits in South Florida","authors":"K. Hendricks, P. Roberts","doi":"10.1094/php-02-23-0014-s","DOIUrl":"https://doi.org/10.1094/php-02-23-0014-s","url":null,"abstract":"A survey of cucurbits grown in South Florida was conducted from 2020-2022 for viruses. A total of 481 plant samples (470 cucurbit and 11 non-cucurbit) included watermelon, squash, cantaloupe, cucumber, zucchini, five weeds commonly found in cucurbit fields, cowpea, and two vegetable volunteer plants growing in a watermelon field. Samples were tested for cucurbit chlorotic yellows virus (CCYV), squash vein yellowing virus (SqVYV), papaya ringspot virus-W (PRSV-W), watermelon crinkle leaf-associated virus 1 (WCLaV-1), watermelon crinkle leaf-associated virus 2 (WCLaV-2), cucurbit yellow stunting disorder virus (CYSDV), and cucurbit leaf crumple virus (CuLCrV). All seven viruses were detected with WCLaV-1 as the predominant virus found in cucurbits, followed by CYSDV and WCLaV-2. The majority of samples were mixed infections containing two or more viruses. Host tissue testing found the peduncle was a good source for testing for all viruses. Host symptoms were variable on leaves for WCLaV-1 and WCLaV-2 and in mixed infections with the other five viruses. More studies are required to ascertain the role of WCLaV-1 and WCLaV-2 in mixed infections and their effect on plant health, fruit quality, and yield.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47433949","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 to Phytopythium helicoides and Phytopythium vexans causing Root and Crown Rot Diseases 引起根腐病和冠腐病的螺旋藻和涡旋藻诊断指南
IF 2.3
Plant Health Progress Pub Date : 2023-06-21 DOI: 10.1094/php-01-23-0003-dg
Bhawana Ghimire, F. Baysal-Gurel
{"title":"A Diagnostic Guide to Phytopythium helicoides and Phytopythium vexans causing Root and Crown Rot Diseases","authors":"Bhawana Ghimire, F. Baysal-Gurel","doi":"10.1094/php-01-23-0003-dg","DOIUrl":"https://doi.org/10.1094/php-01-23-0003-dg","url":null,"abstract":"Phytopythium was initially grouped with closely related species of the Pythium group, which German botanist Nathanael Pringsheium first described in 1858. Later with the progress in studies of this group, the clade K (Ovatisporagnium) of the genus Pythium was concluded to be more closely related to the genus Phytophthora than Pythium. Ovatisporangium in the Pythium group was then replaced by the term Phytopythium. Hence, the genus Phytopythium is relatively new and is different from Pythium (Bala et al. 2010; Lodhi et al. 2020; Tkaczyk 2020). It exhibits intermediate morphological features between Phytophthora and Pythium but is unique in having internally proliferating papillate sporangia and cylindrical or lobate antheridia (De Cock et al. 2015). Phytopythium helicoides (Abad, De Cock, Bala, Robideau, Lodhi & Levesque) and Phytopythium vexans (Abad, De Cock, Bala, Robideau, Lodhi & Levesque) are two closely related emerging oomycete plant pathogens in the Phytopythium group. Several other names have been provided to P. helicoides in the past such as Pythium helicoides (Drechsler 1930) and Ovatisporangium helicoides (Azizi et al. 2013) whereas P. vexans (Ivors et al. 2008) was called Pythium vexans and Ovatisporangium vexans (Uzuhashi et al. 2010).","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45921371","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
Effects of seed treatments and yield potential on infected soybean seed 种子处理和产量潜力对侵染大豆种子的影响
IF 2.3
Plant Health Progress Pub Date : 2023-06-19 DOI: 10.1094/php-03-23-0019-rs
Alexandria Jade Haafke, Y. Kandel, J. Batzer, N. K. Dangal, D. Mueller
{"title":"Effects of seed treatments and yield potential on infected soybean seed","authors":"Alexandria Jade Haafke, Y. Kandel, J. Batzer, N. K. Dangal, D. Mueller","doi":"10.1094/php-03-23-0019-rs","DOIUrl":"https://doi.org/10.1094/php-03-23-0019-rs","url":null,"abstract":"Diaporthe seed decay (DSD) is an endemic disease throughout most soybean growing regions. A major outbreak of DSD occurred in 2018 in Iowa and other parts of the U.S. The most prevalent fungi associated with this outbreak in Iowa were Diaporthe longicolla and D. caulivora. We established field experiments in 2019 and 2020 in two central Iowa locations to evaluate the effects of seed treatments and yield potential of Diaporthe-infected seed lots. Seed of the same variety but originating from different sources were categorized as “good” or “bad” seed and depending on percent of Diaporthe-infected seed. Four seed treatments were tested, and results indicated that there were differences in plant stand, plant health (normalized difference vegetation index and canopy coverage) (both years), and yield (2019) between both seed lots. The good seed lot had about 9% greater yield than the bad seed lot (P < 0.001), while seed lots had similar yield in 2020 (P = 0.822). Seed treatments improved stand, canopy greenness, and canopy coverage, but did not affect yield in either year. For the yield potential experiment, there were minimal differences in plant health and no differences in yield between good and bad seed lots thinned to the same plant population in both years. These results suggest Diaporthe-infected seed lots with lower germination and plant stand resulted in less yield, and seed treatments can improve soybean stand, canopy greenness, and coverage. Also, Diaporthe-infected seed did not affect soybean growth and development or yield once plant stand was established.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44368466","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
Summarized distribution of the southern root-knot nematode, Meloidogyne incognita, in field crops in the United States 综述了南方根结线虫(Meloidogyne incognita)在美国大田作物中的分布
IF 2.3
Plant Health Progress Pub Date : 2023-06-05 DOI: 10.1094/php-04-23-0031-br
T. Faske, J. Mueller, J. O. Becker, E. Bernard, C. Bradley, J. Bond, J. Desaeger, J. Eisenback, Z. Grabau, Jiahuai Hu, R. Kemerait, A. Koehler, K. Lawrence, H. Mehl, R. Rudolph, E. Sikora, Steve Thomas, N. Walker, T. Wheeler, J. A. Wrather, W. Ye, Lei Zhang
{"title":"Summarized distribution of the southern root-knot nematode, Meloidogyne incognita, in field crops in the United States","authors":"T. Faske, J. Mueller, J. O. Becker, E. Bernard, C. Bradley, J. Bond, J. Desaeger, J. Eisenback, Z. Grabau, Jiahuai Hu, R. Kemerait, A. Koehler, K. Lawrence, H. Mehl, R. Rudolph, E. Sikora, Steve Thomas, N. Walker, T. Wheeler, J. A. Wrather, W. Ye, Lei Zhang","doi":"10.1094/php-04-23-0031-br","DOIUrl":"https://doi.org/10.1094/php-04-23-0031-br","url":null,"abstract":"The southern root-knot nematode, Meloidogyne incognita is one the most important, yield-limiting pathogens of agronomic and vegetable crops in the United States and worldwide. M. incognita was first reported on cotton (Gossypium hirsutum L.) in Alabama in the United States in 1889. Since then, M. incognita has been reported in many states across the United States. These reports include detections in greenhouses, nurseries, or home gardens, but do not provide information on where this species persists from year to year in field soils. Furthermore, these reports do not provide distribution information within each state in individual counties. The objective of this report was to summarize the distribution of M. incognita on field crops (e.g., agronomic and vegetable crops) by county for each state across the continental United States.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41659264","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
Integration of host resistance, seed treatment, and seeding rate for management of sudden death syndrome, a disease of soybean caused by Fusarium virguliforme 寄主抗性、种子处理和播种率的整合用于处理由镰刀菌引起的大豆猝死综合征
IF 2.3
Plant Health Progress Pub Date : 2023-05-17 DOI: 10.1094/php-04-22-0036-rs
Y. Kandel, Mariama T. Brown, A. Byrne, J. Jacobs, M. Chilvers, Edward M. Ernat, N. Kleczewski, B. Mueller, D. Telenko, A. Tenuta, Damon L. Smith, D. Mueller
{"title":"Integration of host resistance, seed treatment, and seeding rate for management of sudden death syndrome, a disease of soybean caused by Fusarium virguliforme","authors":"Y. Kandel, Mariama T. Brown, A. Byrne, J. Jacobs, M. Chilvers, Edward M. Ernat, N. Kleczewski, B. Mueller, D. Telenko, A. Tenuta, Damon L. Smith, D. Mueller","doi":"10.1094/php-04-22-0036-rs","DOIUrl":"https://doi.org/10.1094/php-04-22-0036-rs","url":null,"abstract":"Field experiments were conducted in Illinois, Indiana, Iowa, Michigan, Wisconsin and Ontario Canada in 2019 and 2020 to evaluate the integrated effects of host resistance, seed treatment, and seeding rates on root rot (RR) and foliar symptoms of sudden death syndrome (FDX) and soybean yield. Seed treatments included a nontreated control and fluopyram in 2019. In 2020, commercial base treatment, base + fluopyram, and base + pydiflumetofen were tested. Base treatment included metalaxyl + pyraclostrobin + fluxapyroxad + clothianidin. Seed treatments were tested on susceptible and moderately resistant (MR) cultivars, which were planted at 272,277, 346,535 and 420,792 seeds/ha. Seed treatment with fluopyram or pydiflumetofen both reduced FDX and protected yield. Fluopyram reduced RR by about 10%, but RR was not different between pydiflumetofen and the base treatment in 2020. Both seed treatments reduced FDX, but reduction was greater for fluopyram (43.2%) than for pydiflumetofen (24.3%) based on 2020 results. Seeding rate had no effect on foliar symptoms, but the highest seeding rate showed increased RR in 2019, and greater yield both years. Performance of MR cultivars was inconsistent across both years. In 2019, MR cultivars reduced RR by 8.9%, however, in 2020, MR cultivar had more RR than the susceptible cultivar. Also, FDX was only reduced by the MR cultivar in 2020. Integrating seed treatment, host resistance, and adequate seeding rates helped maximize yield in fields with SDS.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47101864","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: 1
Bacteria disinfection of rice seeds by ultraviolet light irradiation in a biosafe flow cabinet 生物安全流动柜中紫外线对水稻种子的细菌消毒
IF 2.3
Plant Health Progress Pub Date : 2023-05-15 DOI: 10.1094/php-02-23-0017-rs
Yulin Jia, Q. Read
{"title":"Bacteria disinfection of rice seeds by ultraviolet light irradiation in a biosafe flow cabinet","authors":"Yulin Jia, Q. Read","doi":"10.1094/php-02-23-0017-rs","DOIUrl":"https://doi.org/10.1094/php-02-23-0017-rs","url":null,"abstract":"Easy-to-use methods to disinfect microbes on seeds are not available. In the present study, rice 30 seeds were irradiated by 274 nanometer germicidal ultraviolet proton in a biosafe flow cabinet. Seeds (10) without any barrier, in a sterilized mesh bag, or in a sterilized coin envelope were removed each day with sterilized forceps for seven days after UV irradiation and then were placed in nutrient agar media in a dark incubator at 29°C for three days, after which the number of seeds contaminated with bacteria and/or fungi were counted. At the same time, 10 seeds each time were removed from each UV treatment, and kept in a dark incubator at 40 °C for five days to determine the germination rate. Both bacterial and fungal infection rates declined significantly over time. The germination rate with an average of (90% ±7.1) did not change significantly over time. There was no significant difference among treatments for germination rate or fungal infection rate. The UV irradiation of seeds in mesh bags had the strongest effect on reducing bacterial infection rates over time, whereas the direct UV irradiation had a weaker effect on bacterial infection rates than the UV irradiation of seeds in mesh bags. We suggest that UV irradiation of seeds in mesh bags be used to reduce seed bacterial contamination.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48895208","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
Integration of disease tolerance and fungicide application for management of tar spot on hybrid corn in North Central United States 美国中北部杂交玉米焦油斑病防治中抗病性与杀菌剂应用的结合
IF 2.3
Plant Health Progress Pub Date : 2023-05-10 DOI: 10.1094/php-10-22-0103-rs
T. J. Ross, M. Chilvers, A. Byrne, Damon L. Smith, B. Mueller, S. Shim, D. Telenko
{"title":"Integration of disease tolerance and fungicide application for management of tar spot on hybrid corn in North Central United States","authors":"T. J. Ross, M. Chilvers, A. Byrne, Damon L. Smith, B. Mueller, S. Shim, D. Telenko","doi":"10.1094/php-10-22-0103-rs","DOIUrl":"https://doi.org/10.1094/php-10-22-0103-rs","url":null,"abstract":"Tar spot, caused by Phyllachora maydis, is the most significant disease of corn in the north central United States. Elucidating an integrated management approach to protect grain yield is a high priority. The integration of tillage, hybrid, and fungicide application on tar spot severity, canopy greenness, and grain yield was assessed in Indiana in 2019, 2020, and 2021. A split-plot arrangement of two tillage treatments as main plots with factorial arrangement of subplots with three hybrids (tar spot susceptible and two partially resistant) and fungicide application (propiconazole +benzovindiflupyr +azoxystrobin) were evaluated. Further, a multistate study comparing two hybrids (susceptible and partially resistant) and fungicide application (propiconazole +benzovindiflupyr +azoxystrobin) was conducted in Indiana, Michigan, and Wisconsin in 2020. This research demonstrates that partially resistant hybrids with a sAUDPC of 2.5 and 3.0 had significantly less tar spot than a susceptible hybrid with a sAUDPC of 10.1 and increased canopy greenness rating of 48.1 and 51.5% which were significantly higher than the susceptible hybrid at 13.0% at maturity. Tar spot severity was further reduced and canopy greenness increased with a fungicide application in the susceptible hybrid. These results suggest that partial resistance alone may be used to manage tar spot. Yields did not differ significantly across hybrids with or without a fungicide application. However, a general trend of preserved yield potential was observed in the treatments with fungicide, indicating that knowledge of genetics and yield potential will be necessary to achieve the most benefit from partially resistant hybrids and judicious fungicide applications.","PeriodicalId":20251,"journal":{"name":"Plant Health Progress","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41973211","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
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