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Melon 2018

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  • Enza
  • Zaden
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Resistances Resistances

Resistances Resistances in varieties of our crops will be coded (please, see our coding list on www.enzazaden.com for explanation), unless indicated otherwise. Varieties claiming the same level of resistance against a specific pest or pathogen may exhibit a different resistance response due to a different genetic makeup of a variety.It is to be noted that if a resistance is claimed in a plant variety it is limited to the specified biotypes, pathotypes, races or strains of the pest or pathogen. If no biotypes, pathotypes, races or strains are specified in the resistance claim for the variety, it is because no generally accepted classification of the cited pest by biotype, pathotype, race or strain exists. In this case resistance is only claimed against certain not further specified isolates of that pathogen. New biotypes, pathotypes, races or strains that may emerge are not covered by the original resistance claim. Immunity: not subject to attack or infection by a specified pest or pathogen Resistance: the ability of a plant variety to restrict the growth and development of a specified pest or pathogen and/or the damage they cause when compared to susceptible plant varieties under similar environmental conditions and pest or pathogen pressure. Resistant varieties may exhibit some disease symptoms or damage under heavy pest or pathogen pressure. Two levels of resistance are defined: • High resistance (HR): plant varieties that highly restrict the growth and development of the specified pest or pathogen under normal pest or pathogen pressure when compared to susceptible varieties. These plant varieties may, however, exhibit some symptoms or damage under heavy pest or pathogen pressure. • Intermediate resistance (IR): plant varieties that restrict the growth and development of the specified pest or pathogen, but may exhibit a greater range of symptoms or damage compared to highly resistant varieties. Intermediate resistant plant varieties will still show less severe symptoms or damage than susceptible plant varieties when grown under similar environmental conditions and/or pest or pathogen pressure. Susceptibility: the inability of a plant variety to restrict the growth and development of a specified pest or pathogen. Tolerance: the ability of a plant variety to endure abiotic stress without serious consequences for growth, appearance and yield. Vegetable companies will continue to use tolerance for abiotic stress. Full explanation available on www.enzazaden.com Scientific name pathogen ISF English name Code Races/Strains Level of resistance Viruses Cucumber green mottle mosaic virus Cucumber green mottle CGMMV Cucumber mosaic virus Cucumber mosaic CMV IR Cucumber vein yellowing virus Cucumber vein yellowing CVYV Cucurbit yellow stunting disorder virus Cucurbit yellow stunting disorder CYSDV Melon Necrotic Spot Virus Melon necrotic spot MNSV HR Moroccan watermelon mosaic virus Moroccan watermelon mosaic MWMV Papaya ringspot virus Papaya ringspot PRSV IR Squash leaf curl virus Squash leaf curl SLCV Squash mosaic virus Squash mosaic SqMV Watermelon mosaic virus Watermelon mosaic WMV IR Zucchini yellow mosaic virus Zucchini yellows ZYMV IR Disclaimer Descriptions, recommendations and illustrations in brochures and leaflets shall correspond as closely as possible to tests and practical experience and are subject to typographical and/or printing errors. This information shall be provided to assist professional growers and users, whereby variable local conditions must be taken into account. Under no circumstances shall Enza Zaden accept liability based on such information for deviating results in the cultivated product. Current information concerning the resistances is available on www.enzazaden.co.uk. Fungi Didymella bryoniae Gummy stem blight Db Fusarium oxysporum f.sp. melonis Fusarium wilt Fom 0 HR Fusarium oxysporum f.sp. melonis Fusarium wilt Fom 1 HR Fusarium oxysporum f.sp. melonis Fusarium wilt Fom 2 HR Fusarium oxysporum f.sp. melonis Fusarium wilt Fom 1,2 IR Pseudoperonospora cubensis Downy mildew Pcu Golovinomyces cichoracearum (ex. Erysiphe cichoracearum) Powdery mildew Gc 1 IR Podosphaeria xanthii (ex Sphaerotheca fuliginea) Powdery mildew Px 1 IR Podosphaeria xanthii (ex Sphaerotheca fuliginea) Powdery mildew Px 2 IR Podosphaeria xanthii (ex Sphaerotheca fuliginea) Powdery mildew Px 3 IR Podosphaeria xanthii (ex Sphaerotheca fuliginea) Powdery mildew Px 5 IR Podosphaeria xanthii (ex Sphaerotheca fuliginea) Powdery mildew Px 3.5 IR Insects Aphis gossypii Cotton aphid Ag IR 30 | Enza Zaden 31 | Enza Zaden

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