engleski

Influence of climate conditions on grain yield and appearance of white rot (sclerotinia sclerotiorum) in field experiments with sunflower hybrids

The three year research results of tests with sunflower hybrids in micro, macro and production experiments enabled the proper choice of the most suitable cultivar and in the way high and stabile yield of grain and oil. In unfavorable production years and due to its genetic constitution and morphological characteristics sunflower is susceptible to attack of different pathogens, who significantly decrease the grain yield as well as the content and yield of oil. Field experiments (2005 - 2007) were conducted on two locations (Vinkovci and Osijek) with seven sunflower hybrids: Apolon, Favorit, PR63A90, PR63A42, Heliasol, Opera, NS-H-111. It was determined that grain yield and disease appearance significantly vary depending on the quantity of rainfall, temperatures over the vegetation and selection of sunflower hybrid. The minimal grain yield (1.14 tha-1) and the highest disease appearance (24 – 67 % of diseased plants) was in wet 2005 and the highest yield (3.87 tha-1) and the lowest disease appearance (3.2 – 5.8 % of diseased plants) was in dry 2007. The highest average yield had the hybrid PR63A90 (3.12 tha-1) and the lowest yield had the hybrid NS-H-111 (2.05 tha-1). The differences in the yield quantity and disease appearance between the two locations were not signifficant.

macro experiments ; sunflower hybrids ; disease ; grain yield ; oil content

Rad je prezentiran na skupu VII Alps-Adria Scientific Workshop, odrzanom u Stara Lesna, Slovacka, 2008.g.