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This paper describes the influence of initial dose of nitrogen and foliar nutrition on LAI (leaf area index) index and on infection of fungal pathogens of two morphotypes of faba beans. Occurrence of ascochyta blight (Ascochyta fabae), chocolate spots (Botrytis fabae) and faba bean rust (Uromyces fabae) was analysed. In the years 2011–2013 strict field tests were carried at the Experimental Station of Variety Evaluation in Przeclaw. The following factors were analysed: initial nitrogen dose (25 kg/ha), foliar nutrition (Basfoliar 6-12-6) and Granit and Amulet cultivars. The initial dose of nitrogen considerably increased LAI index in comparison with the control but the foliar nutrition did not influence LAI index as compared with the control. Amulet cultivar was better than Granit cultivar as far as tested parameters were concerned. According to the obtained results fertilization with the initial dose of nitrogen and foliar nutrition did not influence the infection severity of diseases caused by the examined fungal pathogens in respect to the control. On the other hand the cultivars were sensitive to the studied diseases at a different level and it varied in individual years. Granit cultivar as compared with Amulet was infected more by ascochyta blight and chocolate spots and less by faba bean rust.

Influence of initial dose of nitrogen and foliar nutrition on LAI index and infection of fungal pathogens of two morphotypes of field bean