Andreas Westphal
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View article: Co-Location of QTL for Vigor and Resistance to Three Diseases in Juglans microcarpa × J. regia Rootstocks
Co-Location of QTL for Vigor and Resistance to Three Diseases in Juglans microcarpa × J. regia Rootstocks Open
A QTL on chromosome 4D of the Juglans microcarpa × J. regia genome that co-located resistance against Agrobacterium tumefaciens, Phytophthora pini, and Phytophthora cinnamomi disease scores was investigated for additional traits. Phenotypi…
View article: Walnut growers want rootstocks that can resist diseases
Walnut growers want rootstocks that can resist diseases Open
English walnuts are the walnut species of choice for nut production. In the United States, edible English walnuts are almost exclusively produced in California, using soil and water resources on more than 370,000 acres. Scion cultivars of …
View article: Transcriptomic Evidence of a Link between Cell Wall Biogenesis, Pathogenesis, and Vigor in Walnut Root and Trunk Diseases
Transcriptomic Evidence of a Link between Cell Wall Biogenesis, Pathogenesis, and Vigor in Walnut Root and Trunk Diseases Open
Crown gall disease (Agrobacterium tumefaciens), crown/root rot disease (Phytophthora spp.), root lesion disease (Pratylenchus vulnus) and tree vigor are key traits affecting the productivity and quality of walnuts in California. Unchalleng…
View article: A Link Between Cell Wall Biogenesis, Pathogenesis, and Vigor in Walnut Root and Trunk Diseases
A Link Between Cell Wall Biogenesis, Pathogenesis, and Vigor in Walnut Root and Trunk Diseases Open
Crown gall (Agrobacterium tumefaciens), crown/root rot (Phytophthora spp.), root lesion disease (Pratylenchus vulnus), and tree vigor are key traits affecting productivity and quality of walnuts in California. Non-inoculated hybrid rootsto…
View article: Developing cover crop systems for California almonds: Current knowledge and uncertainties
Developing cover crop systems for California almonds: Current knowledge and uncertainties Open
Almond (Prunus amygdalus) orchard systems are highly productive and widespread in Mediterranean climates and dominate the California agricultural landscape. However, current intensive monocultural bare soil production practices limit the p…
View article: Effects of Substrate and Processing Conditions on Nematode Suppressiveness of Anaerobic Biogas Digestates
Effects of Substrate and Processing Conditions on Nematode Suppressiveness of Anaerobic Biogas Digestates Open
Biogas digestates produced from anaerobically processed food or dairy manure have demonstrated some potential to suppress different pathogens and pests. In this study, digestates from these two substrates processed mesophilically (20 to 40…
View article: A Semi-supervised approach to cluster symptomatic and asymptomatic leaves in root lesion nematode infected walnut trees
A Semi-supervised approach to cluster symptomatic and asymptomatic leaves in root lesion nematode infected walnut trees Open
Breeding strategies for many crops require quantitative evaluations of many genotypes from within as large of a diverse breeding pool as possible. In selecting pathogen tolerant genotypes, accurate and fast phenotyping to investigate genet…
View article: Co-located quantitative trait loci mediate resistance to Agrobacterium tumefaciens, Phytophthora cinnamomi, and P. pini in Juglans microcarpa × J. regia hybrids
Co-located quantitative trait loci mediate resistance to Agrobacterium tumefaciens, Phytophthora cinnamomi, and P. pini in Juglans microcarpa × J. regia hybrids Open
Soil-borne plant pathogens represent a serious threat that undermines commercial walnut ( Juglans regia ) production worldwide. Crown gall, caused by Agrobacterium tumefaciens , and Phytophthora root and crown rots, caused by various Phyto…
View article: Biological Suppression of Populations of Heterodera schachtii Adapted to Different Host Genotypes of Sugar Beet
Biological Suppression of Populations of Heterodera schachtii Adapted to Different Host Genotypes of Sugar Beet Open
Productivity of sugar beet and brassica vegetable crops is constrained by the nematode Heterodera schachtii worldwide. In sugar beet cropping areas of Central Europe and North America, H. schachtii is managed by crop rotation, and cultivat…
View article: Effects of Cover Cropping on Microbial Communities Associated with Heterodera schachtii and Nematode Virulence
Effects of Cover Cropping on Microbial Communities Associated with Heterodera schachtii and Nematode Virulence Open
Nematode-resistant cover crops can suppress populations of plant-parasitic nematodes. Samples of a loamy and a sandy loam soil were collected from two sugar beet fields in Lower Saxonia, northern Germany (“Jeinsen” and “Gross Munzel”) to m…
View article: First Report of the Peach Root-Knot Nematode, <i>Meloidogyne floridensis</i> Infecting Almond on Root-Knot Nematode Resistant ‘Hansen 536’ and ‘Bright's Hybrid 5’ Rootstocks in California, USA
First Report of the Peach Root-Knot Nematode, <i>Meloidogyne floridensis</i> Infecting Almond on Root-Knot Nematode Resistant ‘Hansen 536’ and ‘Bright's Hybrid 5’ Rootstocks in California, USA Open
In April-August 2018, samples of galled roots with rhizosphere soil were collected from almond orchards in Atwater, Merced County and Bakersfield, Kern County, California. Almond trees ( Prunus dulcis ) grafted on ‘Hansen 536’ and ‘Brights…
View article: Microbial Communities in <i>Globodera pallida</i> Females Raised in Potato Monoculture Soil
Microbial Communities in <i>Globodera pallida</i> Females Raised in Potato Monoculture Soil Open
Globodera spp. are under strict quarantine in many countries. Suppressiveness to cyst nematodes can evolve under monoculture of susceptible hosts. Females developing in potato monoculture soil infested with G. pallida populations Chavornay…