Response of Introduced Sunflower Hybrids to Broomrape (Orobanche cumana W.)

1Plant Protection Institute, BG-2230 Kostinbrod, Bulgaria
2Executive Agency for Variety Testing, Field Inspection and Seed Control, BG – 1113 Sofia, Bulgaria


ALEXANDROV, V. and S. DIMITROV, 2007. Response of introduced sunflower hybrids to broomrape (Orobanche cumana W.). Bulg. J. Agric. Sci., 13: 521-527

The response of 16 introduced sunflower hybrids, bred by Pioneer, Monsanto and Naucni institut za ratarstvo i povrtarstvo-Novi Sad, to broomrape in the conditions of natural infection background, and was studied. The tests took place on leached chernozem-smolnitsa in the Complex Experimental Station in the town of Yambol in the period 2001-2003. Cv. Peredovik and hybrid Albena were used as controls.
None of the tested sunflower hybrids proved immune to Orobanche cumana W. One hybrid showed resistance to the parasite and nine – medium resistance and all had higher yield vs. controls. They would be recommended to grow in the conditions of strong broomrape infection. Controls were parasite sensitive.

Key words: response, sunflower, introduced hybrids, broomrape (Orobanche cumana W.)

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