Biocontrol Agents for Plant Pest Management

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: 25 August 2025 | Viewed by 978

Special Issue Editor


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Guest Editor
Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
Interests: biological control; plant pests; fermentation; plant pathogenic bacteria; plant immunity; plant pathology
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Special Issue Information

Dear Colleagues,

Plant diseases and pests have long been the biggest challenge in agricultural production. In the demand for sustainable agriculture, combining multiple approaches to reduce the use of chemical agents and the occurrence of pesticide resistance in pathogens and insects is an important issue. Among them, the development of various agents and technologies based on the concept of biological control has been a popular research topic in recent years. Examples of related topics that are of interest for this Special Issue include the following: 1. innovative biocontrol strategies, focusing on new methods and technologies in biocontrol; 2. greenhouse and field trails, highlighting successful applications of biocontrol agents in various crops; 3. integration with other pest management practices, examining how biocontrol can be effectively integrated into traditional pest management approaches. This Special Issue aims to collect manuscripts on the aforementioned topics to inspire more ideas for agricultural applications.

Prof. Dr. Yi-Hsien Lin
Guest Editor

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Keywords

  • agricultural management
  • plant pests
  • plant diseases
  • biocontrol agents
  • biocontrol techniques
  • integrated pest management

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Published Papers (1 paper)

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Research

17 pages, 1416 KB  
Article
Humic Substances Promote the Activity of Enzymes Related to Plant Resistance
by Rakiely M. Silva, Fábio L. Olivares, Lázaro E. P. Peres, Etelvino H. Novotny and Luciano P. Canellas
Agriculture 2025, 15(15), 1688; https://doi.org/10.3390/agriculture15151688 - 5 Aug 2025
Viewed by 341
Abstract
The extensive use of pesticides has significant implications for public health and the environment. Breeding crop plants is the most effective and environmentally friendly approach to improve the plants’ resistance. However, it is time-consuming and costly, and it is sometimes difficult to achieve [...] Read more.
The extensive use of pesticides has significant implications for public health and the environment. Breeding crop plants is the most effective and environmentally friendly approach to improve the plants’ resistance. However, it is time-consuming and costly, and it is sometimes difficult to achieve satisfactory results. Plants induce defense responses to natural elicitors by interpreting multiple genes that encode proteins, including enzymes, secondary metabolites, and pathogenesis-related (PR) proteins. These responses characterize systemic acquired resistance. Humic substances trigger positive local and systemic physiological responses through a complex network of hormone-like signaling pathways and can be used to induce biotic and abiotic stress resistance. This study aimed to assess the effect of humic substances on the activity of phenylalanine ammonia-lyase (PAL), peroxidase (POX), and β-1,3-glucanase (GLU) used as a resistance marker in various plant species, including orange, coffee, sugarcane, soybeans, maize, and tomato. Seedlings were treated with a dilute aqueous suspension of humic substances (4 mM C L−1) as a foliar spray or left untreated (control). Leaf tissues were collected for enzyme assessment two days later. Humic substances significantly promoted the systemic acquired resistance marker activities compared to the control in all independent assays. Overall, all enzymes studied in this work, PAL, GLUC, and POX, showed an increase in activity by 133%, 181%, and 149%, respectively. Among the crops studied, citrus and coffee achieved the highest activity increase in all enzymes, except for POX in coffee, which showed a decrease of 29% compared to the control. GLUC exhibited the highest response to HS treatment, the enzyme most prominently involved in increasing enzymatic activity in all crops. Plants can improve their resistance to pathogens through the exogenous application of HSs as this promotes the activity of enzymes related to plant resistance. Finally, we consider the potential use of humic substances as a natural chemical priming agent to boost plant resistance in agriculture Full article
(This article belongs to the Special Issue Biocontrol Agents for Plant Pest Management)
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