Host-parasite interactions between Cucurbitaceae and P. cubensis exhibit significant variation. This contribution reviews the current state of knowledge regarding characterization of P. cubensis virulence variation on the level of pathotypes (variation in host genera and species host-range) and races (variation in intraspecific level). However, our knowledge of the interactions between P. cubensis isolates and the […]
Month: November 2018
Cucurbit Powdery Mildew Population Virulence Variation – a Complex View from a Global Perspective
Cucurbit powdery mildew (CPM) is mainly caused by two obligate ectoparasites, Golovinomyces orontii s.l. (Go) and Podosphaera xanthii (Px), that are highly variable in virulence. Various independent systems of CPM race determination and denomination have been used in recent decades. We recently developed new tools to enhance research of CPM virulence variation. Diversity models were […]
Cucurbit Rootstocks Resistant to Fusarium Wilt of Watermelon Retain Resistance When CoInfected by Southern Root-Knot Nematode
The interspecific hybrid squash (Cucurbita maxima × C. moschata) rootstock ‘Carnivor’ is resistant to Fusarium oxysporum f. sp. niveum (FON) but susceptible to Meloidogyne incognita, the southern root-knot nematode. A new citron (Citrullus amarus) rootstock ‘Carolina Strong Back’ is resistant to FON and M. incognita. The objectives of this study were to determine if an […]
Genomic Characterization of Xanthomonas cucurbitae, the Causal Agent of Bacterial Spot Disease of Cucurbits
Plants in the Cucurbitaceae family comprise several economically-important vegetable and fruit crops including pumpkin, squash, zucchini, cucumber, melon, and watermelon. In 2017, world production of pumpkins, squash, and gourds exceeded 24 million tons worth more than $4 billion, and U.S. production of pumpkins, squash, and gourds was worth $370 million. Illinois farmers are responsible for […]
Aphid-Triggered Immunity in Melon / Key Determinants for Durable Resistance to Virus and Aphids
The Vat gene in melon is unique in conferring resistance to both A. gossypii and the viruses it transmits. This double phenotype is controlled by a cluster of genes including a CC-NLR which has been characterized in detail. Copy-number polymorphisms (for the whole gene and for a domain that stands out in the LLR region) […]
Resistance to Fungicides in Cucurbit Powdery Mildew in Europe
One hundred cucurbit powdery mildew (CPM) isolates (41 Golovinomyces orontii s.l. [Go], 59 Podosphaera xanthii [Px]) from the Czech Republic (2012 to 2015), were screened for fungicide efficacy to the six frequently used fungicides (quinoxyfen /Atlas 500 SC/, propiconazole /Bumper 25 EC/, fenpropimorph /Corbel/, dinocap /Karathane LC/ azoxystrobin /Ortiva/) and penconazole /Topas 100 EC/). Fungicide […]
CUCURBITACEAE 2018 Abstracts (PQ)
Production and Quality View abstracts in the conference PDF booklet. Green Nanotechnology: An Effective Approach for Watermelon Growth while Maintaining Quality Pratibha Acharya, Guddadarangavvanahally Jayaprakasha, Kevin Crosby, John Jifon, Bhimanagouda Patil Texas A&M University, Vegetble and Fruit Improvement Center, Department of Horticultural Sciences, College station, TX, USA Nano-priming is an innovative technique for improving seed […]
CUCURBITACEAE 2018 Abstracts (G1, G2)
Genomics View abstracts in the conference PDF booklet. Exploring Genetic Diversity in the U.S. National Melon Collection Kaori Ando¹, Xin Wang², Umesh Reddy³, Zhangjun Fei², James D. McCreight¹ ¹U.S. Department of Agriculture, Agricultural Research Service, Crop Improvement and Protection Research Unit, Salinas, CA, USA. ²Boyce Thompson Institute, Ithaca, NY, USA. ³Gus R. Douglass Institute and […]
CUCURBITACEAE 2018 Abstracts (GR)
Genetic Resources View abstracts in the conference PDF booklet. Where in The New Melon Classification Schemes Does Cucumis melo ssp. agrestis var. texanus Belong? Kaori Ando1, Xin Wang2, Zhangjun Fei3,2, William M. Wintermantel1, James D. McCreight1 1U.S. Department of Agriculture, Agricultural Research Service, Crop Improvement and Protection Research Unit, Salinas, CA, USA. 2Boyce Thompson Institute, […]
CUCURBITACEAE 2018 Abstracts (FD)
Floral and Fruit Development View abstracts in the conference PDF booklet. Flowering, Yield and Fruit Quality of Three Organically Grown Zucchini Cultivars Evaluated in two Different Cropping Seasons Elisabeth Abele¹, Jens Hartung², Michael Fleck3, Sabine Zikeli4, Simone Graeff-Hönninger¹ ¹Department of Agronomy, Institute of Crop Science, University of Hohenheim, Stuttgart, 70599, Germany. ²Department of Agronomy, Institute […]