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Agronomy
Special Issues
Grass and Forage Diseases: Etiology, Epidemic and Management
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Grass and Forage Diseases: Etiology, Epidemic and Management

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Grassland and Pasture Science".

Deadline for manuscript submissions: 30 April 2025 | Viewed by 3248

Special Issue Editors

Prof. Dr. Xiangling Fang

E-Mail Website
Guest Editor
State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
Interests: forage pathology; alfalfa; root disease; fungal pathogen; grass microbiology
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Tingyu Duan

E-Mail Website
Guest Editor
State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
Interests: grass and forage pathology; arbuscular mycorrhizal fungi; plant-microbial interaction; biological control
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Grass and forage plants play important roles in developing grassland animal husbandry, promoting sustainable agricultural development and environment protection worldwide. Diseases pose serious threats to grass and forage plants, with adverse impacts on growth, yield and quality. It is important to understand the etiology and epidemiology of diseases in grass and forage plants for effective management. This Special Issue will cover the current research advances and future prospects in the etiology, epidemic and management of grass and forage diseases in China. The cutting-edge research can be summarized as follows: pathogenicity; disease resistance breeding; and green management. We are soliciting submissions relating to the etiology, epidemiology and management of grass and forage diseases in China.

Prof. Dr. Xiangling Fang
Prof. Dr. Tingyu Duan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • grass diseases
  • forage diseases
  • pathogens
  • disease resistance
  • management
  • breeding

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

12 pages, 7615 KiB  
Article
Infection Process of Alfalfa Root Rot Caused by Fusarium acuminatum
by Le Wang, Jianfeng Yang, Ruifang Jia, Zhengqiang Chen, Na Wang, Jie Wu, Fangqi Chen, Yuanyuan Zhang and Kejian Lin
Agronomy 2024, 14(9), 2157; https://doi.org/10.3390/agronomy14092157 - 21 Sep 2024
Viewed by 819
Abstract
Fusarium spp. can cause root rot in alfalfa, leading to the death of the whole plant, which seriously affects the yield and quality of alfalfa. This study used a Fusarium acuminatum strain labeled with green fluorescent protein (GFP) to observe the infection process [...] Read more.
Fusarium spp. can cause root rot in alfalfa, leading to the death of the whole plant, which seriously affects the yield and quality of alfalfa. This study used a Fusarium acuminatum strain labeled with green fluorescent protein (GFP) to observe the infection process of F. acuminatum on alfalfa by confocal fluorescence microscopy. The aim of this study was to reveal the infection mechanism of alfalfa Fusarium root rot at the cellular histological level. The results showed that conidia of F. acuminatum attached to the surface of the root and germinated at one day post-inoculation, the mycelium then entered the vascular bundle tissue of the alfalfa root at 5 days post-inoculation, reached the base of the plant stem at 14 days post-inoculation, and colonized the stem of the first and second compound leaf at 28 and 49 days post-inoculation, respectively. Moreover, the experiment, which sprayed a spore suspension, showed that the conidia of F. acuminatum could spread through the air to infect the pericarp and seed coat tissue of the pod. For the first time, we report the infection process of alfalfa Fusarium root rot caused by F. acuminatum and clarify that F. acuminatum can initially infect the root tissue of alfalfa, colonize the bottom stem of the plant through systematic infection, and eventually cause the plant to wilt and die. The results reveal the infection mechanism of F. acuminatum at the cell level via histology and provide theoretical support for the development of control strategies and key control technologies for alfalfa root rot. Full article
(This article belongs to the Special Issue Grass and Forage Diseases: Etiology, Epidemic and Management)
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12 pages, 2164 KiB  
Article
Alterations in Physiological Parameters and Secondary Metabolites of Astragalus adsurgens Infected by the Pathogen Alternaria gansuensis
by Xinyao Han, Xiaopeng Li, James F. White, Rebecca Creamer, Chunjie Li and Binhua Yu
Agronomy 2024, 14(9), 1892; https://doi.org/10.3390/agronomy14091892 - 24 Aug 2024
Viewed by 689
Abstract
Alternaria gansuensis, a seed-borne fungus of standing milkvetch (Astragalus adsurgens), is the most common pathogen of this plant species and causes yellow stunt and root rot. Although plant resistance to this disease has been identified, a better understanding of the [...] Read more.
Alternaria gansuensis, a seed-borne fungus of standing milkvetch (Astragalus adsurgens), is the most common pathogen of this plant species and causes yellow stunt and root rot. Although plant resistance to this disease has been identified, a better understanding of the nature of this resistance will help improve and optimize its implementation in standing milkvetch. The effects of A. gansuensis on the physiology of standing milkvetch were assessed in a 4-week study comparing a resistant plant variety, Shanxi, and a susceptible variety, Ningxia. In the first week, there was an obvious decrease in photosynthesis (P) in inoculated plants, especially in the susceptible variety, but there were no changes in stomatal conductance (Sc). From the second week on, P and Sc decreased progressively, and significant stem lesions were observed concomitantly. Water use efficiency (WUE) increased slightly in the second week but then decreased significantly from the third week. Physiological changes observed for the resistant variety of standing milkvetch were less dramatic than those of the susceptible variety. Hyphae were observed around inoculation lesions of the plants. Culture filtrate (CF) of A. gansuensis induced changes in extracellular pH and conductivity, especially in the susceptible variety samples. Tissue integrity changes in the plants correlated with the decrease in P. Secondary metabolite compounds were extracted from the plants and 21 types of compounds were identified. The composition and proportion of secondary metabolites were markedly altered by the pathogen, and these differences may indicate potential mechanisms of disease resistance to A. gansuensis in standing milkvetch. Full article
(This article belongs to the Special Issue Grass and Forage Diseases: Etiology, Epidemic and Management)
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14 pages, 4221 KiB  
Article
Leaf Spot Disease of Red Clover Caused by Leptosphaeria weimeri (=Longiseptatispora meliloti) in China
by Rongchun Zheng, Zhibiao Nan and Tingyu Duan
Agronomy 2024, 14(5), 1055; https://doi.org/10.3390/agronomy14051055 - 16 May 2024
Viewed by 1060
Abstract
Red clover (Trifolium pretense) is widely cultivated as an excellent forage and green manure crop. In 2021, a leaf spot disease was discovered in a red clover field in Min County, Gansu Province, China. Symptoms on T. pratense manifested as small [...] Read more.
Red clover (Trifolium pretense) is widely cultivated as an excellent forage and green manure crop. In 2021, a leaf spot disease was discovered in a red clover field in Min County, Gansu Province, China. Symptoms on T. pratense manifested as small white spots that gradually expanded into nearly oval or irregularly shaped gray-white lesions. The causal agent of this new disease was identified as Leptosphaeria weimeri (=Longiseptatispora meliloti) based on morphological identification, pathogenicity tests, and the phylogenetic identification of ITS, LSU, and SSU sequence. The optimal growth temperature was found to be 20 °C under different culture conditions, while the optimal spore-producing temperature was 25 °C. The pH for optimal growth and spore production was seven. The fungus grew and produced spores successfully on both PDA and PSA media. Additionally, the pathogen was efficiently inhibited using 450 g/L of prochloraz fungicide in vitro. To our knowledge, this is the first report of leaf spot disease on red clover caused by L. meliloti in China. Full article
(This article belongs to the Special Issue Grass and Forage Diseases: Etiology, Epidemic and Management)
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