Canadian Journal of Plant Pathology最新文献_第10页

A strategy for controlling Cercospora leaf spot, caused by Cercospora beticola, by combining induced host resistance and chemical pathogen control and its implications for sugar beet yield 诱变抗性与化学防治相结合防治甜菜斑孢叶斑病的对策及其对甜菜产量的影响

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2022-01-10 DOI: 10.1080/07060661.2021.2024262

S. Morsy, M. F. Shady, M. Gouda, Bahnasy A. Kamereldawla, M. Abdelrazek

{"title":"A strategy for controlling Cercospora leaf spot, caused by Cercospora beticola, by combining induced host resistance and chemical pathogen control and its implications for sugar beet yield","authors":"S. Morsy, M. F. Shady, M. Gouda, Bahnasy A. Kamereldawla, M. Abdelrazek","doi":"10.1080/07060661.2021.2024262","DOIUrl":"https://doi.org/10.1080/07060661.2021.2024262","url":null,"abstract":"Abstract Cercospora beticola populations resistant to methyl benzimidazole carbamate (MBC), quinone outside inhibitor (QoI), and demethylation inhibitor (DMI) fungicides have been reported in Egypt. This pathogen causes a difficult to control variant of Cercospora leaf spot (CLS) on sugar beet. We conducted field experiments over two years to investigate treatment efficacies on MBC- and QoI-resistant, but partially DMI-sensitive, C. beticola from a research farm in Sakha, Egypt. DMI fungicides showed moderate efficacy with half the maximal effective concentration (EC50). Efficacy was 67.2–69.1% and 63.4–63.6% for epoxiconazole (EPO) and propiconazole (PRO), respectively. When each fungicide was mixed with salicylic acid (SA) at EC50 (EPO + SA) and EC50 (PRO +SA), efficacy was 77.5–79.1% and 77.0–78.2%, respectively. The QoI fungicide, azoxystrobin, showed lower efficacy (46.4–49.5%) when applied alone, but enhanced efficacy when combined with SA at EC50/EC50 (77.0–78.2%). Carbendazim alone was only 47.5–45.1% effective, but when mixed with SA, had a 67.1% co-toxicity factor in vitro, indicating antagonism between components. An Artemisia cina aqueous extract (WEA) combined with SA (WEA/SA) showed 76.0–78.2% efficacy, compared with 69.0–71.0% and 49.0–52.7% for WEA and SA, respectively. Single treatments were classified into five sensitivity classes from sensitive (<1) to resistant (>100) based on their EC50 values. Significant increases in insensitivity were observed from 2015/16 to 2017/18. All treatments increased total yield, sucrose percentage, and recoverable white sugar compared with the untreated control. A combination of control strategies could allow for effective disease and fungicide resistance management.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"44 1","pages":"518 - 533"},"PeriodicalIF":2.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45950098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Elevated expression of ribosome-inactivating protein (RIP) genes in potyvirus-resistant watermelon in response to viral infection 抗痘病毒西瓜中核糖体失活蛋白(RIP)基因表达升高对病毒感染的响应

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2021-12-23 DOI: 10.1080/07060661.2021.2021450

Bidisha Chanda, Shan Wu, Z. Fei, K. Ling, A. Levi

{"title":"Elevated expression of ribosome-inactivating protein (RIP) genes in potyvirus-resistant watermelon in response to viral infection","authors":"Bidisha Chanda, Shan Wu, Z. Fei, K. Ling, A. Levi","doi":"10.1080/07060661.2021.2021450","DOIUrl":"https://doi.org/10.1080/07060661.2021.2021450","url":null,"abstract":"Abstract Watermelon (Citrullus lanatus) is an important vegetable fruit crop, widely grown in many countries in the tropical and subtropical regions around the world. The narrow genetic base of cultivated watermelon makes it susceptible to many pests and diseases, especially viruses. However, genetic sources of resistance are available in wild relatives that could potentially be used to incorporate the resistance genes into watermelon cultivars. Ribosome-inactivating proteins (RIPs) are prevalent in many plant species and are known to have an important role in defence against bacteria, fungi, and viruses. The objective of this study was to identify RIP-like sequences in the watermelon genome and to conduct comparative measurement of RIP gene expression between the potyvirus-resistant Citrullus amarus ‘PI 244019ʹ versus the susceptible watermelon (C. lanatus) ‘Charleston Gray’ in response to infection by papaya ringspot virus (PRSV). Taking advantage of the recently available genome sequences of ‘PI 244019ʹ and ‘Charleston Gray’, in this study we mined out watermelon RIP genes and conducted comparative sequence and expression analyses of RIP-I and RIP-II between the genotypes. The RIP gene expression analysis revealed elevated RIP gene expression in resistant PI 244019 plants, but not in susceptible ‘Charleston Gray’ plants, in response to inoculation with PRSV, indicating a potential association of RIP gene expression and resistance to potyviruses in watermelon. This elevated expression of RIP genes in association with potyvirus resistance opens a new avenue to investigate the underlying mechanism of potyvirus resistance in watermelon.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"44 1","pages":"615 - 625"},"PeriodicalIF":2.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59967321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cover crop usage for the sustainable management of soilborne diseases in woody ornamental nursery production system 覆盖作物利用对木本观赏苗木生产系统土传病害可持续管理的影响

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2021-12-20 DOI: 10.1080/07060661.2021.2020336

Madhav Parajuli, M. Panth, Axel Gonzalez, K. Addesso, A. Witcher, T. Simmons, F. Baysal-Gurel

{"title":"Cover crop usage for the sustainable management of soilborne diseases in woody ornamental nursery production system","authors":"Madhav Parajuli, M. Panth, Axel Gonzalez, K. Addesso, A. Witcher, T. Simmons, F. Baysal-Gurel","doi":"10.1080/07060661.2021.2020336","DOIUrl":"https://doi.org/10.1080/07060661.2021.2020336","url":null,"abstract":"Abstract Cover crops represent a potential tool for suppression of soil borne diseases in woody ornamental nursery production, which can cause significant economic losses. Field experiments were conducted in 2019 and 2020 to explore the effects of a cover crop and the timing of cover crop disturbance on soilborne disease suppression. Soils from red maple (Acer rubrum ‘October Glory’) plantations grown with or without a cover crop [crimson clover (Trifolium incarnatum)] were sampled following senescence of the cover crop. Greenhouse bioassays were conducted using red maple cuttings on inoculated (with Rhizoctonia solani, Phytopythium vexans or Phytophthora nicotianae) and non-inoculated field soils. Plant height, total and root fresh weight were measured, and the roots were assessed for disease severity on a 0 to 100% root damage scale. Pathogen recovery was assessed by culturing root pieces (~1 cm length) on oomycetes or Rhizoctonia semi-selective media. Soil samples were analyzed for organic matter, nitrogen, phosphorus, potassium, pH and Pseudomonad population count. A minimal effect of cover crop disturbance timing (late fall or early spring) was found on disease suppression. Cover crop usage reduced disease severity and pathogen recovery in red maple field soils. Plants grown in cover cropped soil had greater total, root and aboveground fresh weight compared with those from non-cover cropped soil, but plant height was not affected. Cover crops increased soil organic matter and total nitrogen in 2020. Pseudomonad populations were higher when cover crops were used. The results suggest that cover crops can reduce soilborne disease in woody ornamentals.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"44 1","pages":"432 - 452"},"PeriodicalIF":2.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47705696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Interactions among cereal cyst nematode Heterodera filipjevi, dryland crown rot Fusarium culmorum, and drought on grain yield components and disease severity in bread wheat 禾谷孢囊线虫Heterodera filipjevi、旱地冠腐镰刀菌和干旱对面包小麦产量构成和病害严重程度的相互作用

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2021-12-10 DOI: 10.1080/07060661.2021.2013947

Mahin Ahmadi, N. Mirakhorli, G. Erginbas-Orakci, O. Ansari, H. Braun, T. Paulitz, A. Dababat

{"title":"Interactions among cereal cyst nematode Heterodera filipjevi, dryland crown rot Fusarium culmorum, and drought on grain yield components and disease severity in bread wheat","authors":"Mahin Ahmadi, N. Mirakhorli, G. Erginbas-Orakci, O. Ansari, H. Braun, T. Paulitz, A. Dababat","doi":"10.1080/07060661.2021.2013947","DOIUrl":"https://doi.org/10.1080/07060661.2021.2013947","url":null,"abstract":"Abstract The cereal cyst nematode (CCN) Heterodera and crown rot caused by Fusarium species limit cereal production and yield potential. Losses increase when CCN and crown rot occur together, especially under water stress conditions. The objective of this study was to investigate the interactions among Heterodera filipjevi, Fusarium culmorum, and drought on a set of wheat germplasm with differing levels of resistance/tolerance to CCN, crown rot and drought. Plant emergence was significantly reduced (56% seedling death) when seeds were planted in a water stress environment where F. culmorum and H. filipjevi were present. Crown rot was more severe under water stress compared with Fusarium inoculation alone. The number of cysts fell significantly when H. filipjevi was co-inoculated with F. culmorum, revealing an antagonistic interaction between the nematode and fungus. The highest number of cysts was found on the susceptible accession ‘Seri’ under water stress conditions. Water stress caused a significant reduction in plant height, while F. culmorum inoculation did not, unless combined with water stress. Yield components were significantly reduced by each of the single stresses and losses were greater when plants were exposed to double or triple stresses. Water stress and F. culmorum inoculation caused a significant reduction in spike weight and seeds per spike. The chlorophyll content of wheat leaves was negatively affected by water stress and inoculation by both nematode and fungus. In conclusion, water stress exacerbates the damage caused by CCN and crown rot, and planting drought-resistant varieties would be an ideal solution to reduce losses.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"44 1","pages":"415 - 431"},"PeriodicalIF":2.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48471842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Surveillance, breeding, and cultural practices to prevent a rust storm on crops and trees 防止农作物和树木遭受铁锈风暴的监视、育种和文化实践

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2021-12-09 DOI: 10.1080/07060661.2021.1996063

G. Brar, N. Feau, Upinder S. Gill, C. Hiebert, J. LeBoldus, R. Park

引用次数: 1

Understanding the root rot and wilting complex of raspberry: current research advances and future perspectives 了解树莓根腐和萎蔫复合物：当前研究进展和未来展望

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2021-12-08 DOI: 10.1080/07060661.2021.2011420

Sanjib Sapkota, R. Burlakoti, Z. Punja, M. Dossett, E. Gerbrandt

{"title":"Understanding the root rot and wilting complex of raspberry: current research advances and future perspectives","authors":"Sanjib Sapkota, R. Burlakoti, Z. Punja, M. Dossett, E. Gerbrandt","doi":"10.1080/07060661.2021.2011420","DOIUrl":"https://doi.org/10.1080/07060661.2021.2011420","url":null,"abstract":"Abstract Red raspberry (Rubus idaeus L.) is an important fruit crop in British Columbia, Canada, and the Pacific Northwest (PNW) region of the USA, as well as in other regions of the world. Root rot and wilting complex (RRWC), primarily caused by Phytophthora rubi, is the most important biotic constraint responsible for declining raspberry production in these regions, causing millions of dollars in losses. Other root-infecting fungal species and the root lesion nematode (Pratylenchus penetrans) may also be found associated with the disease complex. The average lifespan of raspberry plantings in the PNW is 10 to 12 years, which is reduced to 5 years by the disease complex. Phytophthora spp. play a predominant role in the RRWC complex due to the persistent nature of oospores, rapid dispersal of inoculum, and the polycyclic nature of infection, all of which increase disease severity. In this review, we discuss the current understanding of Phytophthora spp. and other pathogens associated with the RRWC, including pathogen biology and the disease cycle, the impact of infection on the plant, as well as current and potential cultural, biological, and chemical options for management. In addition, we discuss breeding efforts for disease resistance, including conventional and molecular approaches to identify sources of resistance, molecular markers linked to potential resistance genes, and their incorporation into elite breeding materials or cultivars. We also present the current gaps in knowledge, unique challenges, and future perspectives in sustainable disease management of this important disease complex.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"44 1","pages":"323 - 344"},"PeriodicalIF":2.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47900696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Outstanding Research Award The Canadian Phytopathological Society-----------Prix Excellence en rechercheLa Société canadienne de phytopathologie 加拿大植物病理学学会杰出研究奖-----------加拿大植物病理学学会卓越奖

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2021-12-07 DOI: 10.1080/07060661.2021.2002582

引用次数: 0

Career Recognition Award The Canadian Phytopathological Society-----------Prix Reconnaissance de carrièreLa Société canadienne de phytopathologie 加拿大植物病理学协会职业成就奖-----------加拿大植物病理学协会职业成就奖

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2021-12-06 DOI: 10.1080/07060661.2021.2001932

引用次数: 0

Outstanding Research Award, The Canadian Phytopathological Society / Prix Excellence en recherche, La Société canadienne de phytopathologie 获加拿大植物病理学学会杰出研究奖/ La societacemotre canadienne de phytopathology卓越研究奖

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2021-12-06 DOI: 10.1080/07060661.2021.2000121

F. Daayf

引用次数: 0

Podosphaera xanthii causing powdery mildew on Impatiens balsamina in China 在凤仙花上引起白粉病的黄氏水蛭

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2021-11-29 DOI: 10.1080/07060661.2021.2011421

Mo Zhu, Xiao Duan, Qianqian Zeng, P. Cai, Wenqi Shi, Z. Qiu

引用次数: 3