Black bean aphid (Aphis fabae Scopoli) is considered the most important and damaging insect pest of faba beans worldwide, causing damage by direct feeding on the phloem and acting as vectors of viruses. In attempt to identify sources of resistance, a germplasm collection (180 accessions) was screened under field conditions at Córdoba (Spain) during two consecutive growing seasons (2014-2015 and 2015-2016), in assays with 2 replications. The susceptible cvs. Baraca and Alameda were sown each five lines, both as spreaders to ensure the aphids distribution attack and to be used as checks. Heavily infested pots of cv. Alameda were randomly distributed along the field trials by the end of March, usual time of first observations in the field. By mid-May the aphids coverage was quantified and at the end of the growing season the plants harvested and the yield was measured. The 80 most resistant and productive accessions were sown a third seasons (2016-2017) in a 3 replications assay. Several rows of cv. Alameda were uniformly distributed and sown along the trial. At mid-March artificial aphids inoculation was carried out. During spring, infestations levels and aphids damage were recorded several times. The 35 most resistant accessions, selected from field trials, were also studied under controlled conditions to confirm the resistance, in a trial with two repetitions. Seedlings were grown in a growth chamber at 22ºC and inoculated with adult aphids; the aphids coverage was periodically recorded. Several accessions seem to be moderate to highly resistant to the faba bean aphids development.

Trabajo presentado en la International Conference Advances in grain legume breeding, cultivations and uses for a more competitive value-chain, celebrada en Novi Sad (Serbia) el 27 y 28 de septiembre de 2017.

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