Вплив фомопсису на господарські ознаки гібридів соняшнику

Abstract

The paper presents the results of the two-year studies (2009-2010 ys) of sunflower hybrids as to the complex of traits under the infectious site. The level of interconnections between affection of sunflower hybrids by phomopsis causal agent with the economic traits of four maturity groups and the affection by grey rot agent is established. A reverse relation and above average level of it between intensity of the phomopsis agent’s development and the duration of the vegetation period for midripen group is revealed. A direct dependence of productivity of plant in the hybrids of early-ripen group on the intensity of pathogen’s development and reverse one – for all other groups, as well as, oilness reduction in the hybrids of early-ripen group