Influence of the Environment and Vegetable Cropping Systems on Plant-Parasitic Nematode Communities in Southern Georgia

Marquez, Josiah; Severns, Paul M.; Hajihassani, Abolfazl

doi:10.1094/pdis-09-20-2019-re

Cited by 15 publications

(3 citation statements)

References 34 publications

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“…Meloidogyne spp. were found to be the most important plant parasitic nematodes in vegetable fields in Georgia, USA (Marquez et al, 2021). During the spring and fall cropping periods in 2018, some 436 fields across 29 counties were surveyed and sampled for the incidence and abundance of 10 plant parasitic nematode genera in 32 different vegetable crops.…”

Section: Meloidogyne Sppmentioning

confidence: 99%

A Synoptic Review of Plant Disease Epidemics and Outbreaks Published in 2021

Jeger¹,

Fielder²,

Beale³

et al. 2022

Preprint

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A synoptic review of plant disease epidemics and outbreaks was made using two complementary approaches. The first approach involved reviewing scientific literature published in 2021, in which quantitative data related to new plant disease epidemics or outbreaks had been obtained via surveys or similar methodologies. The second approach involved retrieving new pest presence records added to the CABI Distribution Database in 2021. The literature review for the first approach had two stages. Stage 1 aimed to identify publications on plant diseases caused by pathogen taxonomic groups and led to retrieval of 99 core articles describing studies in 62 categories (pathogen species or species complexes) across more than 40 host species in 6 continents. In Stage 2, the core articles were augmented with further articles providing more context and information for the pathogen species identified in Stage 1. When both sets of articles were combined, the pathogen species with more than 5 articles were: Bursephalenchus xylophilus, Candidatus Liberibacter asiaticus, cassava mosaic viruses, citrus tristeza virus, Erwinia amylovora, Fusarium spp. complexes, Fusarium oxysporum f.sp cubense, Magnaporthe oryzae, maize lethal necrosis co-infecting viruses, Meloidogyne spp. complexes, Pseudomonas syringae pvs, Puccinia striiformis f.sp tritici, Xylella fastidiosa, and Zymoseptoria tritici. The automated search of the CABI Distribution Database led to 617 new distribution records from 283 plant pathogens in 2021 and was followed by manual review of all pathogens with more than 4 new records, to identify confirmed first reports in a new location. A total of 15 pathogens was identified: apple hammerhead viroid, apple rubbery wood viruses, Aphelenchoides besseyi, Biscogniauxia mediterranea, Ca. Liberibacter asiaticus, citrus tristeza virus, Colletotrichum siamense, cucurbit chlorotic yellows virus, Erwinia rhapontici, Erysiphe corylacearum, Fusarium oxysporum f.sp. cubense Tropical Race 4, Globodera rostochiensis, Nothophoma quercina, potato spindle tuber viroid, and tomato brown rugose fruit virus. Although 3 very important pathogens – Ca. Liberibacter asiaticus, citrus tristeza virus and Fusarium oxysporum f.sp cubense – were represented in the results of both approaches, in general the two approaches revealed distinct sets of plant disease outbreaks and new records, with little overlap in the results.

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Section: Meloidogyne Sppmentioning

confidence: 99%

A Synoptic Review of Plant Disease Epidemics and Outbreaks Published in 2021

Jeger¹,

Fielder²,

Beale³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…3,4 Rootknot nematode (RKN; Meloidogyne spp.) is the most serious PPN in vegetable fields in Georgia, 5,6 with M. incognita being the most prevalent RKN species. 7 Important vegetable soilborne fungal pathogens in Georgia include Pythium spp., Fusarium oxysporum, Rhizoctonia solani, Athelia rolfsii, and Sclerotinia sclerotiorium.…”

Section: Introductionmentioning

confidence: 99%

Successional effects of cover cropping and deep tillage on suppression of plant‐parasitic nematodes and soilborne fungal pathogens

Marquez

Hajihassani

2023

Pest Management Science

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BACKGROUND Cover crops can suppress soilborne nematodes and fungal pathogens by serving as a poor host to pathogens and producing allelopathic compounds. Yet, cultural practices can influence their effectiveness. Cover crop and weedy fallow rotations and their interactions with deep tillage were evaluated from 2019 to 2021 in a three‐season vegetable cropping system (spring tomato, fall squash, and winter cabbage) for their suppressive effects on soilborne diseases. Experimental plots were arranged in a split‐plot 2 × 4 factorial design in randomized complete blocks. Whole‐plot tillage treatments were shallow‐tilled or deep‐tilled. Subplots had two factors of crop rotations: rotation type (cover crop [spring or fall sunn hemp or winter rye] or weedy fallow) and rotation season. RESULTS Independent of tillage practice, sunn hemp and weedy fallow reduced population density and root galling severity of root‐knot nematode (Meloidogyne incognita) for the first subsequent vegetable compared to the all‐vegetable rotation (P < 0.05) but had little effect on fungal pathogens. Fall sunn hemp had higher plant biomass and reduced gall severity for the second subsequent vegetable. Spring and fall sunn hemp improved vegetable yields. Winter rye only reduced ring nematodes (Mesocriconema spp.) population density in the first subsequent vegetable. Deep tillage reduced incidence of fungal pathogens of Rhizoctonia solani and Sclerotinia sclerotiorum, and population density of stubby‐root nematode (Nanidorus minor). CONCLUSION Sunn hemp is effective in suppressing M. incognita, whereas deep tillage can be used to suppress R. solani, S. sclerotiorum, and N. minor in vegetable production systems. © 2023 Society of Chemical Industry.

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“…A study in corn found no correlation of M. xenoplax densities with EC, pH, or % silt, though densities were correlated to soils with lower organic matter and/or lower clay content (Simon et al., 2018). Similarly, M. xenoplax densities in vegetable crops were not correlated with soil physical or chemical properties (Marquez et al., 2021). As vineyard soils in western Oregon are generally acidic and those in eastern Washington are mostly alkaline, this offers an opportunity to examine the effect of soil texture and pH on reproduction of these two plant‐parasitic nematode species.…”

Section: Introductionmentioning

confidence: 99%

Vineyard soil texture and pH effects on Meloidogyne hapla and Mesocriconema xenoplax

East,

Zasada,

Lee

et al. 2023

Agrosystems Geosci & Env

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Northern root‐knot nematode (Meloidogyne hapla) and ring nematode (Mesocriconema xenoplax) are the most prevalent plant‐parasitic nematodes of wine grapes in the Pacific Northwest, but M. hapla is most important in eastern Washington and M. xenoplax in western Oregon. These regions differ edaphically where Washington soils are minimally weathered and alkaline while Oregon soils are highly weathered and acidic. To examine the effect of soil texture and pH on nematode reproduction, an alkaline, sandy loam soil (pH 7.9) from Washington and an acidic loam soil from Oregon (pH 5.4) were modified to the other pH extreme, and to a middle pH of 6.9. Tomatoes were planted into each soil/pH combination, and either 500 M. hapla second‐stage juveniles or M. xenoplax individuals were added to each pot. After 7 weeks, plants were harvested, three roots collected for analysis, remaining roots and leaves dried and weighed, and nematode population densities determined as eggs on roots (M. hapla) and nematodes in soil (M. xenoplax). Soil texture (sandy loam or loam) had no effect on either nematode, but M. hapla reproduction was greater in the lowest pH soil while M. xenoplax was unaffected by soil pH. Mesocriconema xenoplax parasitism reduced root length and root tip number, whereas M. hapla increased root mass in the highest pH Washington soil. Under these experimental conditions, it appears vineyard soil texture in the Pacific Northwest is not a determining factor in population growth of these nematodes, but M. hapla performed better at low pH.

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Influence of the Environment and Vegetable Cropping Systems on Plant-Parasitic Nematode Communities in Southern Georgia

Cited by 15 publications

References 34 publications

A Synoptic Review of Plant Disease Epidemics and Outbreaks Published in 2021

A Synoptic Review of Plant Disease Epidemics and Outbreaks Published in 2021

Successional effects of cover cropping and deep tillage on suppression of plant‐parasitic nematodes and soilborne fungal pathogens

Vineyard soil texture and pH effects on Meloidogyne hapla and Mesocriconema xenoplax

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