Plant Parasitic Nematodes in California Agriculture

Chitambar, John J.; Westerdahl, B. B.; Subbotin, Sergei A.

doi:10.1007/978-3-319-99585-4_6

Cited by 10 publications

(9 citation statements)

References 77 publications

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“…The so far most noticeable economic impact is reported from California in young almond nursery rooting (Marek et al, 2013;Seidle et, 2016). The pathogen has been hypothesised to establish primarily in nurseries with bare-root propagative almond plants predisposed to abiotic stressesincluding temperature variations in cold storage, and in almond production fields (Chitambar, 2016).…”

Section: Impactsmentioning

confidence: 99%

“…cold storage or infection by other pathogens, symptoms may become severe. F. brachygibbosum overwinters as mycelium or spores in infected plant debris (including crop residues) and seed, or as chlamydospores (thick‐walled asexual spores) and sclerotia in soil (Padwick, 1945; Chitambar, 2016; Stack et al., 2017). Asexual spores (microconidia and macroconidia) are dispersed by wind or rain‐splash.…”

Section: Pest Categorisationmentioning

confidence: 99%

“…Initially identified as member of the FIESC ( Fusarium incarnatum–Fusarium equiseti species complex) or FCSC ( Fusarium chlamydosporum species complex) based on morphology, it was later resolved as a phylogenetically distinct species nested outside these two complexes, based on comparisons of partial EF-1 and RPB2 gene sequences (O'Donnell et al., 2009). The increased frequency of F. brachygibbosum detection worldwide on different hosts during the last few years than earlier is likely due to the availability of new molecular tools able to distinguish this pathogen from other coexisting Fusarium species (Chitambar, 2016).…”

Section: Pest Categorisationmentioning

confidence: 99%

“…Spread by natural means. F. brachygibbosum overwinters as mycelium or spores in infected plant residues and in seed, or as chlamydospores and sclerotia in soil (Padwick, 1945; Chitambar, 2016; Stack et al., 2017). Asexual spores (microconidia and macroconidia) are dispersed locally by wind, water or rain‐splash.…”

Section: Pest Categorisationmentioning

confidence: 99%

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Pest categorisation of Fusarium brachygibbosum

Bragard¹,

Serio²,

Gonthier³

et al. 2021

EFS2

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The EFSA Plant Health Panel performed a pest categorisation of Fusarium brachygibbosum Padwick. F. brachygibbosum is a well-characterised fungal plant pathogen with opportunistic behaviour, mostly isolated along with other fungal pathogens in symptomatic hosts. It has been reported from Africa, America, Asia and Oceania where it is has been associated with a wide range of symptoms on approximately 25 cultivated and non-cultivated plant species. The pathogen has been reported in Italy in soil/marine sediments and in quinoa (Chenopodium quinoa) and durum wheat (Triticum turgidum subsp. durum) seeds. The pathogen is not included in the EU Commission Implementing Regulation 2019/2072. This pest categorisation focused on a selected range of host plant species on which F. brachygibbosum fulfilled Koch 0 s postulates and was formally identified by multilocus gene sequencing analysis. Host plants for planting, seed of host plants and soil and other substrates originating in infested third countries are main pathways for the entry of the pathogen into the EU. There are no reports of interceptions of F. brachygibbosum in the EU. Host availability and climate suitability factors occurring in the EU are favourable for the establishment of the pathogen in Member States (MSs). Phytosanitary measures are available to prevent the introduction of the pathogen into the EU. Additional measures are available to mitigate the risk of entry and spread of the pathogen in the EU. Despite the low aggressiveness observed in some reported hosts, it has been shown that, in the areas of its present distribution, the pathogen has a direct impact on certain hosts (e.g. almond, onion, soybean, tobacco) that are also relevant for the EU. The Panel concludes that F. brachygibbosum satisfies all the criteria to be regarded as a potential Union quarantine pest. However, high uncertainty remains regarding the distribution of the pathogen in the EU and some uncertainty exists about its potential impact in the EU. Specific surveys and re-evaluation of Fusarium isolates in culture collections could reduce these uncertainties.

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Section: Impactsmentioning

confidence: 99%

Section: Pest Categorisationmentioning

confidence: 99%

Section: Pest Categorisationmentioning

confidence: 99%

Section: Pest Categorisationmentioning

confidence: 99%

See 2 more Smart Citations

Pest categorisation of Fusarium brachygibbosum

Bragard¹,

Serio²,

Gonthier³

et al. 2021

EFS2

View full text Add to dashboard Cite

show abstract

“…Symptoms of PPN infestation on fruit plants often include weaker growth, chlorosis, with a decrease in photosynthesis, followed by wilting, and eventual plant death. All these effects lead indirectly to a reduction in yields and a deterioration in the quality of fruit [Bahadur 2021], most often reflected by lower fruit weights [Chitambar et al 2018].…”

mentioning

confidence: 99%

Effect of orchard site and climatic conditions on plant nematode density levels

Rutkowski

2022

asphc

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Phytoparasitic nematodes are commonly found in the soil and their presence can lead to plant diseases, weaker growth, reduced yields and lower fruit quality. A study conducted in 2006–2009, involving the monitoring of climatic conditions, identified the influence of precipitation and temperature on the number of nematodes, in 7 sites within a cherry orchard. Soil samples to assess nematode populations were taken from 7 sites that differed in terms of cultivation and age: 5 cherry orchards established in different years. Not all nematode taxa responded in the same way to temperature increase. Members of the families Belonolaimidae, Trichodoridae and the genus Aphelenchus increased in number with rising temperatures. The negative water balance limited the number of nematodes in the soil in the layer up to 30 cm, whereas the increase in soil moisture had a positive effect on the development of Paratylenchus spp., and mebers of the family Hoplolaimidae and Heterodera. The largest total number of nematodes was found on the strip cultivated with agricultural crops after orchard liquidation. However, parasitic nematodes accounted for were at low levels (17%). The size of fruits from trees growing on sites with a large number of nematodes decreased with a simultaneous increase in total soluble solids and fruit firmness.

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Scenarios for sustainable management of plant parasitic nematodes

Westerdahl

2021

Indian Phytopathology

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Plant parasitic nematodes cause significant yield reductions worldwide. Before development of soil fumigation, sustainable practices were developed for nematode management; but were utilized with limited success. The restricted availability of fumigants and other nematicides, has stimulated a return to research into more sustainable management scenarios. In recent years, new tools have been developed that improve the successful utilization of sustainable methods including: nematode resistant crop varieties, trap cropping, biofumigation, molecular identification techniques, databases that can be accessed online to search for crops resistant to nematodes, relatively inexpensive soil temperature dataloggers, nematode degree-day models, research on nematode biology and population cycling, development of less toxic chemicals, and development of new soil amendments and natural products. Combining these with a strong nematode control and certification program for nursery crops, have made it possible to develop promising scenarios to reduce damaging nematode populations and increase yields.

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Plant Parasitic Nematodes in California Agriculture

Cited by 10 publications

References 77 publications

Pest categorisation of Fusarium brachygibbosum

Pest categorisation of Fusarium brachygibbosum

Effect of orchard site and climatic conditions on plant nematode density levels

Scenarios for sustainable management of plant parasitic nematodes

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