Plant characteristics of faba bean (Vicia faba L.) cultivars associated with broomrape (Orobanche crenata Forsk.) attack in a naturally infested field
1989
Karamanos, A.J. | Avgoulas, C.E. (Agricultural Univ., Athens (Greece). Laboratory of Crop Production)
Plant and crop characteristics of 12 faba bean cultivars of different origins were examined against broomrape (Orobanche crenata Forsk.) attack in a naturally infested field. The number of broomrape spikes on a plant basis differed significantly among cultivars, indicating different degrees of susceptibility. The late appearance of the parasite, by mid-podding stage, permitted the consideration of most characteristics as independent variables in relation to the degree of attack. The number of stems and seeds/plant, as well as the total plant dry weight, exhibited the highest negative correlations with the degree of attack. The ratio of leaf area integral after anthesis over seed yield, used as an index of the availability of assimilates to the parasites, exhibited high positive correlations with broomrape attack. In most cases, the relations between plant characteristics and broomrape attack were expressed better by parabolic than by linear regressions
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