Plant Disease (2004) 88, 479-484

H. Eizenberg, D. Plakhine, J. Hershenhorn, Y. Kleifeld and B. Rubin (2004)
Variation in responses of sunflower cultivars to the parasitic weed broomrape
Plant Disease 88 (5), 479-484
Abstract: Development of four Orobanche species, O. cumana, O. aegyptiaca, O. ramosa, and O. cernua, was compared on resistant and susceptible sunflower cultivars. Sunflower plants were infected by O. cumana, O. aegyptiaca, and O. ramosa, but not by O. cernua, in field and greenhouse studies. However, cultivating the hosts and parasites in a polyethylene bag system allowed the observation that sunflower induced O. cernua seed germination. This difference demonstrates that O. cernua is unique from the other three species. O. cumana, O. aegyptiaca, and O. ramosa attached to and developed tubercles on the susceptible sunflower 'Adi.' On the resistant 'Ambar' sunflower, a greater percentage of tubercles were degenerated or dead than on the susceptible cultivar. Thus, resistance of Ambar appears to manifest during tubercle development. Seed production of Adi sunflower was greatly reduced with infection by O. cumana.
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Database assignments for author(s): Hanan Eizenberg, Baruch Rubin, Joseph Hershenhorn

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Orobanche cumana (weed)	Sunflower (Helianthus annuus)	Israel
	Phelipanche aegyptiaca (weed)	Sunflower (Helianthus annuus)	Israel
	Phelipanche ramosa (weed)	Sunflower (Helianthus annuus)	Israel