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Evaluation of lentil varieties and farming system effect on seed damage and yield loss due to bruchid infestation
A major constraint of lentil cultivation is yield reduction due to field infestation by the insect Bruchus sp. The aim of the study was to assess the seed and yield loss due to bruchid infestation under organic and conventional farming and investigate the genotypic variability of 20 lentil varieties for bruchid damage in regard to seed yield. Field experiments were established for three consecutive years at two areas located in central (IFCI) and northern Greece (AUTH). Seed loss (SL) was determined as the percentage of damaged seeds, whereas the weight of the damaged seeds was estimated as yield loss (YL). The farming system was the main source of variation for SL and YL. Mean SL under organic farming was 15% and mean YL was 0.13 t ha-1. SL and YL were 2.6 and 8.4 fold higher under organic in comparison to conventional farming, respectively. Valuable genotypic variability for SL and YL was observed. Early flowering and small seed size were traits associated with low SL and YL. Mean SL ranged among varieties from 8.5 to 29.2% and YL from 0.06 to 0.31 t ha-1. The evaluation for high yield potential in regard to bruchid tolerance revealed two types of promising varieties: varieties with high yield and low seed bruchid damage due to phenological escape and varieties with high yielding potential despite the high SL and YL.
CP17309 Accepted 09 January 2018
© CSIRO 2018