Cucumber resistance to downy mildew (Pseudoperonospora cubensis) in the Non-Black earth zone of the Russian Federation

Abstract

Relevance.Currently, downy mildew of cucumber (peronosporosis) is the most harmful disease onthis crop in the open ground, has an epiphytotic character and causes significant damage to thecrop of greens.Material and methods.The research was carried out on selection and collection material of the laboratory of selection and seed production of pumpkin crops in the open and protected ground of theMoscow region. At least 300 collection and selection samples of cucumber were sown in the openand protected ground (Moscow region) every year, for phytopathological evaluation. Their defeatby downy mildew was taken into account on a 5-point scale.Results.Among the varieties of FSBSI FSVC selection, were less affected by this disease: Edinstvo,Electron 2, Vodoley, Vodopad, F1Debut, F1Krepish, F1Brunette, F1Frant, F1Krasotka and F1VNIISSOK 1. The most resistant to peronosporosis were Japanese varieties – Sadao rishu, Jibai, HiganFushinari, Tropical slicer and others. Some Polish hybrids – Aladyn (SKW 190), Heron (SKW 290)and Parys (SKW 390), also had increased resistance to downy mildew. It should be noted that thevarieties Jerelo and Geim from Ukraine; Dutch hybrids – F1Sequenza, F1Bejo 1612, F1Pontia,85/2292, F1Donia mix; from the United States – F1Calypso. In the selection for resistance todowny mildew you can to use varieties created in the Far East, the Crimean experimental breedingstation. As a result of the annual assessment of parent forms on a natural infectious background,samples with increased resistance to downy mildew were selected.