Detection, Identification, and Control of Plant Pathogens

A special issue of Agriculture (ISSN 2077-0472). This special issue belongs to the section "Crop Protection, Diseases, Pests and Weeds".

Deadline for manuscript submissions: closed (31 March 2021) | Viewed by 4488

Special Issue Editors


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Guest Editor
College of Agricultural and Environmental Sciences, University of Georgia, Tifton, CAES Campus Horticulture Bldg, 2360 Rainwater Road, Tifton, GA 31793 0000, USA
Interests: plant pathology; fungal and bacterial diseases; management of plant diseases; vegetable crops

E-Mail Website
Guest Editor
1. Molecular Bacteriology, Biodiversity (Microbiology), Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON K1A 0C6, Canada
2. Department of Plant Sciences, University of Manitoba, Winnipeg, MB, Canada
Interests: phytobacterial pathogens; bacterial taxonomy; molecular detection; genome-based identification; beneficial bacteria and biological control

Special Issue Information

Dear Colleagues,

Biotic diseases of agricultural crops cause significant yield losses of up to 16% globally, with potential negative impacts on food security. Due to global warming, coupled with high rainfall, diseases of important cultivated crops are predicted to increase as a result of new emerging and old re-emerging plant pathogens. Early detection, accurate identification, and predictive modeling are essential strategies for the mitigation of these biotic threats in agricultural cropping systems. Pathogen detection systems/tools generally lead to a reduced use of chemical pesticides with benefits to the environment and public health. Additionally, accurate identification of plant pathogens provides evidence-based technical advice for farmers/stakeholders, leading to the selection of effective control methods.

This Special Issue is aimed at innovative research dealing with detection, identification/characterization, predictive modeling, and control (biological/chemical) of plant pathogens, such as bacteria, fungi, viruses, phytoplasmas, and nematodes. Manuscripts of original research and review articles are encouraged. Studies of agronomic practices, with demonstrated direct effects on the prevalence, incidence, and/or severity of plant diseases, are within the scope of this issue. Finally, first disease reports will be considered, if the pathogen(s) is/are well characterized using a combination of classical and molecular methods, and Koch’s postulate is verified.

Dr. Bhabesh Dutta
Dr. James T. Tambong
Guest Editors

Manuscript Submission Information

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Keywords

  • Molecular identification and detection
  • Classical identification
  • Plant pathogens
  • Plant diseases
  • Chemical pesticides
  • Biological control
  • Disease forecasts/modeling
  • Genome-based identification of pathogens
  • Pathogen characterization

Published Papers (1 paper)

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Research

13 pages, 2149 KiB  
Article
Volatile Organic Compounds from Rice Rhizosphere Bacteria Inhibit Growth of the Pathogen Rhizoctonia solani
by Enzhao Wang, Xiongduo Liu, Zhiyuan Si, Xu Li, Jingjing Bi, Weiling Dong, Mingshun Chen, Sai Wang, Jiayin Zhang, Alin Song and Fenliang Fan
Agriculture 2021, 11(4), 368; https://doi.org/10.3390/agriculture11040368 - 19 Apr 2021
Cited by 21 | Viewed by 4100
Abstract
Rice sheath blight, a fungal disease caused by Rhizoctonia solani, seriously threatens rice production. Some of the volatile organic compounds (VOCs) produced by microbes are inhibitory to the growth of the plant pathogen, and hence may have the potential as environmentally friendly [...] Read more.
Rice sheath blight, a fungal disease caused by Rhizoctonia solani, seriously threatens rice production. Some of the volatile organic compounds (VOCs) produced by microbes are inhibitory to the growth of the plant pathogen, and hence may have the potential as environmentally friendly antifungal substances. However, information on the inhibitory effect of VOCs released by rice rhizosphere bacteria on R. solani is scarce. In this study, bacteria from the rice rhizosphere capable of inhibiting the growth of R. solani via releasing VOCs were screened using a double Petri dish assay. Headspace solid phase microextraction and gas chromatography mass spectrometry (GC/MS) were used to identify and quantify the VOCs. The contributions of VOCs to the inhibition of the growth of R. solani were estimated by constructing a random forest model, and were verified using pure compounds. Nine strains (i.e., Pseudomonas sp. No. 3, Enterobacter sp. No. 26, Enterobacter sp. No. 34, Pseudomonas sp. No. 35, Ralstonia sp. No. 50, Bacillus sp. No. 62, Arthrobacter sp. No. 146, Brevibacillus sp. No. 2–18, and Paenisporosarcina sp. No. 2–60) showed various inhibition on R. solani growth via VOCs. The inhibitory effect ranged from 7.84% to 100%, with Ralstonia sp. No. 50 completely inhibiting the growth of R. solani. Five VOCs (i.e., benzoic acid ethyl ester, 3-methyl-butanoic acid, 2-ethyl-1-hexanol, 3-methyl-1-butanol, and 6-methyl-5-hepten-2-one) identified by random forest model were confirmed to be toxic to R. solani when applied as a pure chemical compound. In particular, benzoic acid ethyl ester, 3-methyl-butanoic acid, and 2-ethyl-1-hexanol were lethal to R. solani. In summary, the rice rhizosphere bacteria (Ralstonia sp. No. 50) and VOCs (benzoic acid ethyl ester, 3-methyl-butanoic acid, and 2-ethyl-1-hexanol) showed potential to be used as new resources for biological control of rice sheath blight. Full article
(This article belongs to the Special Issue Detection, Identification, and Control of Plant Pathogens)
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