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Agronomy
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Effects of Nematodes on Crops—2nd Edition
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Effects of Nematodes on Crops—2nd Edition

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Pest and Disease Management".

Deadline for manuscript submissions: closed (25 May 2024) | Viewed by 2394

Special Issue Editor

Dr. Koki Toyota

E-Mail Website
Guest Editor
Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan
Interests: soil science; soil; fertilizers; organic matter; carbon cycle; climate change; environmental impact assessment; nematodes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nematodes are essential components in any global soil ecosystem and have key roles in two completely contrasting functions: being beneficial and harmful to crop production. Free-living nematodes are beneficial in nutrient cycling in soil and consist of bacteriovores, fungivores, predators, and omnivores based on what they feed on. Natural nutrient supply capacity mediated by soil microbes and animals, including free-living nematodes, is important in sustainable crop production. By contrast, plant parasitic nematodes are harmful to plants and cause USD 80 billion in damages to global crop production. Thus, it is absolutely important to develop environmentally friendly control measures against plant pathogens. In this Special Issue, we expect to receive contributions of studies on any aspect of the effects of nematodes on crops. Research areas covering this Special Issue are, e.g., the ecology of free-living or plant parasitic nematodes, molecular diagnoses of important nematodes, new nematode diseases, and the novel or feasible biological, chemical, or physical control of plant parasitic nematodes.

Dr. Koki Toyota
Guest Editor

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

  • ecology
  • diagnosis
  • new control methods
  • new diseases
  • sustainable crop production
  • free-living nematodes
  • nutrient cycling

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Related Special Issue

Published Papers (2 papers)

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Research

7 pages, 3335 KiB  
Communication
Identification and Characterization of Root-Knot Nematodes Infecting Polygonatum sibiricum and Peucedanum praeruptorum in China
by Xuelan Wang, Jingjing Wang, Shanquan Duan, Xirui Yan, Yang Wang, Xiahong He and Wentao Wu
Agronomy 2024, 14(4), 782; https://doi.org/10.3390/agronomy14040782 - 10 Apr 2024
Cited by 1 | Viewed by 764
Abstract
The occurrence of root-knot nematode disease has seriously constrained the development of the Chinese herbal medicine industry. China is one of the largest producers of Polygonatum sibiricum and Peucedanum praeruptorum in the world, but the unidentified root-knot nematodes have become important pests of [...] Read more.
The occurrence of root-knot nematode disease has seriously constrained the development of the Chinese herbal medicine industry. China is one of the largest producers of Polygonatum sibiricum and Peucedanum praeruptorum in the world, but the unidentified root-knot nematodes have become important pests of these two Chinese herbal medicines in China. Both morphological characteristics and molecular identification were used to identify the nematodes. The identification results showed that Meloidogyne incognita and M. arenaria were the causal species of root-knot nematode infection in P. sibiricum, and M. hapla was the causal species of the infection in P. praeruptorum. Through investigation, this is the first report of M. incognita and M. arenaria infecting P. sibiricum, and M. hapla infecting P. praeruptorum, in China. The two Chinese herbs are being severely damaged by various root-knot nematodes, and this damage should be taken seriously. Full article
(This article belongs to the Special Issue Effects of Nematodes on Crops—2nd Edition)
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14 pages, 952 KiB  
Article
Evaluation of Soil Suppressiveness of Various Japanese Soils against the Soybean Cyst Nematode Heterodera glycines and Its Relation with the Soil Chemical and Biological Properties
by Yanyan Yang, Junnan Wu, Roland N. Perry and Koki Toyota
Agronomy 2023, 13(11), 2826; https://doi.org/10.3390/agronomy13112826 - 16 Nov 2023
Viewed by 1218
Abstract
This study aimed to evaluate the suppressive potential of different soils on soybean cyst nematodes (SCN) and to estimate the suppressive mechanism. Fifteen soils (designated as soil A to O) from different agricultural fields with varying organic inputs were added with SCN-infested soil [...] Read more.
This study aimed to evaluate the suppressive potential of different soils on soybean cyst nematodes (SCN) and to estimate the suppressive mechanism. Fifteen soils (designated as soil A to O) from different agricultural fields with varying organic inputs were added with SCN-infested soil and grown with a green soybean variety. The SCN density in the soil at 6 weeks of soybean growth was markedly different depending on the soils used, indicating a different level of disease suppressiveness. No significant correlation was observed between the SCN density and any of the soil physicochemical and biological characteristics tested. Then, to estimate a suppression mechanism, F-soil that showed the lowest density of SCN was added to the SCN-infested soil with or without streptomycin to kill bacteria and grown with soybean. SCN density was not increased by the addition of streptomycin, indicating that soil bacteria may not be involved in the suppressiveness of F-soil. In total, 128 fungal strains were isolated from the rhizosphere of F-soil and inoculated in a combination or singly in the SCN-infested soil. After repeated screenings, five strains were selected since the SCN density was consistently decreased by them. Sequence analysis showed that they were closest to Clonostachys rosea, Aspergillus niger, Aspergillus fumigatus, Fusarium oxysporum, and Cylindrodendrum alicantinum. All five strains significantly reduced the mobility of second-stage juveniles (J2). Further, C. rosea a2, A. niger a8, and F. oxysporum a25 significantly decreased hatching. Overall, the present study demonstrated that soil fungi played an important role in SCN suppression in F-soil. Full article
(This article belongs to the Special Issue Effects of Nematodes on Crops—2nd Edition)
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