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research-article | 15-April-2019

Dynamics of the impacts of Pratylenchus penetrans on Gisela® cherry rootstocks

Sweet cherry production is growing rapidly in North America, particularly in the Pacific Northwest and British Columbia. As old orchards are being renovated, growers are shifting to higher density plantings using semi-dwarfing rootstocks such as the Gisela® series (P. cerasus L. × P. canascens L.). The root-lesion nematode, Pratylenchus penetrans (Cobb) Filipjev and Schuurmans Stekhoven, is recognized as an important pest of fruit trees, including sweet cherry grown in temperate regions

Thomas Forge, Denise Neilsen, Gerry Neilsen, Suzanne Blatt

Journal of Nematology, Volume 51 , 1–10

Article | 21-July-2017

Characterization of Lilium longiflorum cv. ‘Nellie White’ Infection with Root-lesion Nematode Pratylenchus penetrans by Bright-field and Transmission Electron Microscopy

Lilium longiflorum cv. Nellie White, commonly known as Easter lily, is an important floral crop with an annual wholesale value of over $26 million in the United States. The root-lesion nematode, Pratylenchus penetrans, is a major pest of lily due to the significant root damage it causes. In this study, we investigated the cytological aspects of this plant–nematode interaction using bright-field and transmission electron microscopy. We took advantage of an in vitro culture method


Journal of Nematology, Volume 49 , ISSUE 1, 2–11

research-article | 17-March-2020

Essential oils for managing Pratylenchus penetrans on Easter lilies

alternatives to the use of pesticides for management of the crops’ major pest, the lesion nematode (Pratylenchus penetrans) (Westerdahl et al., 2003). Essential oils (EOs) are complex mixtures of volatiles, mainly products of plant secondary metabolism. Common components include terpenes, mono- and sesquiterpenes, and phenolic compounds, such as phenylpropanoids. They are generally biodegradable, have low toxicity to mammals and do not accumulate in the environment (Figueiredo et al., 2008). Chitwood (2002

B. B. Westerdahl, D. Giraud, L. J. Riddle, C. A. Anderson

Journal of Nematology, Volume 52 , 1–7

Article | 21-July-2017

Effects of Cover Crops on Pratylenchus penetrans and the Nematode Community in Carrot Production

production systems. Research was conducted at two field sites where cover crops were grown in Fall 2014 preceding Summer 2015 carrot production. At Site 1, rootlesion (Pratylenchus penetrans) and stunt (Tylenchorhynchus sp.) nematodes were present at low population densities (less than 25 nematodes/100 cm3 soil), but were not significantly affected (P > 0.05) by cover crops. At Site 2, P. penetrans population densities were increased (P ≤ 0.05) by ‘Defender&rsquo


Journal of Nematology, Volume 49 , ISSUE 1, 114–123

Article | 21-July-2017

Distribution and Longevity of Pratylenchus penetrans in the Red Raspberry Production System

One of the major constraints on the production of red raspberries in the Pacific Northwest is the presence of the rootlesion nematode Pratylenchus penetrans. Current management of this nematode relies heavily on preplant soil fumigation; however, regulations have made the practice more difficult and expensive. Additional issues with soil fumigation include lack of efficacy at deeper soil depths and potential inability to penetrate raspberry root material that remains in the field during


Journal of Nematology, Volume 48 , ISSUE 4, 241–247

research-article | 30-November-2019

Prevalence of the root lesion nematode virus (RLNV1) in populations of Pratylenchus penetrans from North America

., 2018; Ruark et al., 2017, 2018). We have recently discovered a new virus (the root lesion nematode virus, RLNV1) associated with the migratory nematode Pratylenchus penetrans (Vieira and Nemchinov, 2019). P. penetrans is an endoparasitic migratory PPN, which can infect a broad range of economically important crops (Castillo and Vovlas, 2007) and is among the top three most damaging species of PPN (Jones et al., 2013). Pratylenchus species were the most abundant PPN (69%) identified in 38,022

Paulo Vieira, Amy Peetz, Benjamin Mimee, Kanan Saikai, Dimitre Mollov, Ann MacGuidwin, Inga Zasada, Lev G. Nemchinov

Journal of Nematology, Volume 52 , 1–10

research-article | 30-November-2019

Difference in lesion formation by male and female Pratylenchus penetrans

Pratylenchus penetrans is an economically important species with a wide geographic distribution in temperate climates. Unlike some other species in the genus, P. penetrans requires females and males for reproduction and, therefore, males are common (Thistlethwayte, 1970; Mamiya, 1971). The gender ratio varies, depending on habitat, hosts, and soil conditions (Patterson and Bergeson, 1967). Both genders are migratory throughout the life cycle, feeding on the root surface as an ectoparasite or in

Kanan Saikai, Ann E. MacGuidwin

Journal of Nematology, Volume 52 , 1–9

Article | 21-July-2017

Effect of Application Timing of Oxamyl in Nonbearing Raspberry for Pratylenchus penetrans Management

In 2012, theWashington raspberry (Rubus idaeus) industry received a special local needs (SLN) 24(c) label to apply Vydate L (active ingredient oxamyl) to nonbearing raspberry for the management of Pratylenchus penetrans. This is a new use pattern of this nematicide for raspberry growers; therefore, research was conducted to identify the optimum spring application timing of oxamyl for the suppression of P. penetrans. Three on-farm trials in each of 2012 and 2013 were established in Washington in


Journal of Nematology, Volume 48 , ISSUE 3, 177–182

Research Article | 26-September-2018

Annual and Perennial Alleyway Cover Crops Vary in Their Effects on Pratylenchus penetrans in Pacific Northwest Red Raspberry (Rubus idaeus)

Cover crops can provide many benefits to agroecosystems, such as lessening soil erosion and increasing water infiltration. However, cover crop use is not common in established red raspberry (Rubus idaeus) fields in the Pacific Northwest. Raspberry growers are concerned about resource competition between the cover crop and raspberry crop, as well as increasing population densities of the plant-parasitic nematode Pratylenchus penetrans, which has a wide host range and has been shown to reduce


Journal of Nematology, Volume 49 , ISSUE 4, 446–456

research-article | 30-November-2019

Intraspecific variation in phenotypic and phylogenetic features among Pratylenchus penetrans isolates from Wisconsin, USA

Pratylenchus penetrans (Cobb, 1917) is a cosmopolitan species reported from 69 countries and every continent except Antarctica (EPPO, 2020). Plant damage due to parasitism by P. penetrans has been documented across the plant kingdom with the most severe impact occurring in temperate climates. In Wisconsin, a state in the North Central USA with a diverse agriculture, P. penetrans is a common pest of fruit, vegetable, grain, and forage crops. Identification of P. penetrans is supported by

Kanan Saikai, Ann E. MacGuidwin

Journal of Nematology, Volume 52 , 1–17

research-article | 06-November-2020

Steam-based thermotherapy for managing nematodes in strawberry transplants

(Aphelenchoides besseyi Christie, 1942), root-knot nematode (Meloidogyne hapla Chitwood, 1949), and root-lesion nematode (Pratylenchus penetrans Cobb, 1917). These nematodes coming as quiescent passengers on strawberry transplants do not typically cause any obvious damage symptoms, however, nematode damage occurs later in the crop growing season when environmental conditions are favorable for nematode reproduction. In 2016, foliar nematode outbreak occurred in some strawberry farms in Florida and caused

Churamani Khanal, Mengyi Gu, Natalia A. Peres, Johan A. Desaeger

Journal of Nematology, Volume 52 , 1–10

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