Assessment of Commercial Fungicides against Onion (Allium cepa) Basal Rot Disease Caused by Fusarium oxysporum f. sp. cepae and Fusarium acutatum

Degani, Ofir; Kálmán, B.

doi:10.3390/jof7030235

Cited by 20 publications

(26 citation statements)

References 20 publications

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“…There are scarce methods available to control Fusarium wilt in black pepper in China. During agronomic activities, the contaminated equipment and workers may unintentionally carry the pathogens in and thus the disease is easily spread [36]. In this study, potential chemical fungicides were examined for disease control.…”

Section: Discussionmentioning

confidence: 99%

Identification and screening of fungicides against Piper nigrum basal Fusarium wilt disease in Hainan, China

Liu

Chu

et al. 2023

J Basic Microbiol

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Fusarium wilt has occurred in the main Piper nigrum cultivation regions, which seriously affects the yield and quality of P. nigrum. To identify the pathogen of this disease, the diseased roots were collected from a demonstration base in Hainan Province. The pathogen was obtained by tissue isolation method and confirmed by pathogenicity test. Based on the morphological observation, sequence analyses of TEF1‐α nuclear gene, Fusarium solani was identified as the pathogen causing P. nigrum Fusarium wilt and induced symptoms on inoculated plants, including chlorosis, necrotic spots, wilt, drying, and root rot. The experiments for the antifungal activity showed that all the 11 fungicides selected in this study showed certain inhibitory effects on the colony growth of F. solani, where 2% kasugamycin AS, 45% prochloraz EW, 25 g·L−1 fludioxonil SC and 430 g·L−1 tebuconazole SC exhibited relative higher inhibitory effects with EC50 as 0.065, 0.205, 0.395, and 0.483 mg·L−1, respectively, and were selected to perform SEM analysis and test in seeds in vitro. The SEM analysis showed that kasugamycin, prochloraz, fludioxonil, and tebuconazole might have exerted their antifungal effect by damaging F. solani mycelia or microconidia. These preparations were applied as a seed coating of P. nigrum Reyin‐1. The kasugamycin treatment was most effective in reducing the harmful impact of F. solani on the seed germination. These results presented herein provide useful guidance for the effective control of P. nigrum Fusarium wilt.

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Section: Discussionmentioning

confidence: 99%

Identification and screening of fungicides against Piper nigrum basal Fusarium wilt disease in Hainan, China

Liu

Chu

et al. 2023

J Basic Microbiol

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“…Other than a single ASV that corresponds to an unclassified species of genus Fusarium , we detected F. acutatum , F. solani , F. cuneirostrum , and F. oxysporum in these root samples. Interestingly, all of these Fusarium species are known soybean pathogens ( Daamen et al, 1991 ; Aoki et al, 2005 ; Zhang et al, 2010 ; Arias et al, 2013 ; Yan and Nelson, 2020 ; Degani and Kalman, 2021 ). We also found a greater relative abundance of the fungal species, Macrophomina phaseolina in roots from low yield sites compared to high yield sites.…”

Section: Discussionmentioning

confidence: 99%

Soybean Roots and Soil From High- and Low-Yielding Field Sites Have Different Microbiome Composition

et al. 2021

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The occurrence of high- (H) and low- (L) yielding field sites within a farm is a commonly observed phenomenon in soybean cultivation. Site topography, soil physical and chemical attributes, and soil/root-associated microbial composition can contribute to this phenomenon. In order to better understand the microbial dynamics associated with each site type (H/L), we collected bulk soil (BS), rhizosphere soil (RS), and soybean root (R) samples from historically high and low yield sites across eight Pennsylvania farms at V1 (first trifoliate) and R8 (maturity) soybean growth stages (SGS). We extracted DNA extracted from collected samples and performed high-throughput sequencing of PCR amplicons from both the fungal ITS and prokaryotic 16S rRNA gene regions. Sequences were then grouped into amplicon sequence variants (ASVs) and subjected to network analysis. Based on both ITS and 16S rRNA gene data, a greater network size and edges were observed for all sample types from H-sites compared to L-sites at both SGS. Network analysis suggested that the number of potential microbial interactions/associations were greater in samples from H-sites compared to L-sites. Diversity analyses indicated that site-type was not a main driver of alpha and beta diversity in soybean-associated microbial communities. L-sites contained a greater percentage of fungal phytopathogens (ex: Fusarium, Macrophomina, Septoria), while H-sites contained a greater percentage of mycoparasitic (ex: Trichoderma) and entomopathogenic (ex: Metarhizium) fungal genera. Furthermore, roots from H-sites possessed a greater percentage of Bradyrhizobium and genera known to contain plant growth promoting bacteria (ex: Flavobacterium, Duganella). Overall, our results revealed that there were differences in microbial composition in soil and roots from H- and L-sites across a variety of soybean farms. Based on our findings, we hypothesize that differences in microbial composition could have a causative relationship with observed within-farm variability in soybean yield.

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“…It is important to locate LWD antagonists' fungicides while evaluating their phytotoxicity and efficiency against M. maydis and other associated fungi (the stalk-rot complex) involved in LWD [90]. Together with this effort, developing rapid and efficient screening approaches to assess the potential of these fungicides is needed [10,91]. Preliminary tests on growth media plates aimed at screening many chemical preparations rapidly and indicating their efficiency can be conducted with minimal investment and can save time and effort.…”

Section: From In Vitro Evaluation To a Field Assay Of Selected Fungicidesmentioning

confidence: 99%

Control Strategies to Cope with Late Wilt of Maize

Degani

2021

Pathogens

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Control of maize late wilt disease (LWD) has been at the forefront of research efforts since the discovery of the disease in the 1960s. The disease has become a major economic restraint in highly affected areas such as Egypt and Israel, and is of constant concern in other counties. LWD causes dehydration and collapsing at a late stage of maize cultivation, starting from the male flowering phase. The disease causal agent, Magnaporthiopsis maydis, is a seed- and soil-borne phytoparasitic fungus, penetrating the roots at sprouting, colonizing the vascular system without external symptoms, and spreading upwards in the xylem, eventually blocking the water supply to the plant’s upperparts. Nowadays, the disease’s control relies mostly on identifying and developing resistant maize cultivars. Still, host resistance can be limited because M. maydis undergoes pathogenic variations, and virulent strains can eventually overcome the host immunity. This alarming status is driving researchers to continue to seek other control methods. The current review will summarize the various strategies tested over the years to minimize the disease damage. These options include agricultural (crop rotation, cover crop, no-till, flooding the land before sowing, and balanced soil fertility), physical (solar heating), allelochemical, biological, and chemical interventions. Some of these methods have shown promising success, while others have contributed to our understanding of the disease development and the environmental and host-related factors that have shaped its outcome. The most updated global knowledge about LWD control will be presented, and knowledge gaps and future aims will be discussed.

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Assessment of Commercial Fungicides against Onion (Allium cepa) Basal Rot Disease Caused by Fusarium oxysporum f. sp. cepae and Fusarium acutatum

Cited by 20 publications

References 20 publications

Identification and screening of fungicides against Piper nigrum basal Fusarium wilt disease in Hainan, China

Identification and screening of fungicides against Piper nigrum basal Fusarium wilt disease in Hainan, China

Soybean Roots and Soil From High- and Low-Yielding Field Sites Have Different Microbiome Composition

Control Strategies to Cope with Late Wilt of Maize

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