Volatile compounds as potential bio-fumigants against plant-parasitic nematodes – a mini review

Abstract

Soil fumigation remains the standard practice to manage soilborne pathogens such as plant-parasitic nematodes, bacteria, and fungi, especially in high-value crops. However, increasing regulatory pressure due to the inherent and broad-spectrum toxicity and negative environmental impact of chemical soil fumigants, its negative effect on overall soil health, and increasing demand for organic produce, has created a growing interest in biological fumigants. Many plants and microorganisms emit volatile compounds, which can potentially be used as bio-fumigants. In this mini-review, we summarize the current status of nematology studies focused on the development of volatile compounds emitted from plants and microorganisms as fumigants to control plant-parasitic nematodes. The gap of knowledge and challenges of studying volatile compounds are also addressed.

Effect of Biofumigation with selected Brassicaceae plants on the count and diversity of soil-borne fungi in Arish city, Egypt,

“…Based in our data, the biofumigation technique raised the percentage of OM and OC in soil, altering the soil structure and improving soil quality. These findings are consistent with those of Kumar (2005), Gimsing et al (2006), Hoshino and Mataverageoto (2007), Wang et al (2010), Wang et al (2013), Omirou et al (2011), Reddy (2011), Ntalli and Caboni (2017), Bui andDesaeger (2021), andSarhan et al (2020). Meanwhile, fungal-soil borne was suppressed pathogens after BFB process.…”

“…These findings can be explained by the decomposition of plant tissue, which enriches the soil with extra organic matter, enhancing the growth of some fungus while suppressing others. The rationale for the influence of BFP on the composition of soil-borne pathogens and fungi is consistent with Hanschen and Sarhan et al (2020), Hanschen and Winkelmann (2020), and Bui and Desaeger (2021). During the growth of Brassicaceae species, the fungal count, in general, increased and rarely can be inhibited.…”

Effects of Trichoderma asperellum BV10 and Bacillus amyloliquefaciens BV03 in Meloidogyne incognita Control Considering Three Different Management Systems

“…Although those mechanisms could be the key to control M. incognita, as much it is known, volatiles organic compounds (VOCs) produced by Trichoderma sp. can also present nematode control effects (Bui & Desaeger, 2021). Thus, potential VOCs production from BV10 presented significant decrease on nematode mobility after 48 h of incubation (Table 2), in both forest and conventional managed soils, when it is added to soils.…”

Application Potential of Bacterial Volatile Organic Compounds in the Control of Root-Knot Nematodes

“…The culture conditions (medium composition, oxygen level, temperature, etc.) and physiological stages of microorganisms may influence the production of VOCs in terms of chemical types and amounts [ 93 ]. For instance, Lysobacter strains grown on potato dextrose agar (PDA) and nutrient agar (NA) produced different VOCs.…”