Effects of faba bean (Vicia faba) varieties on the development of Bruchus rufimanus

Abstract

Seidenglanz M., Huňady I. (2016): Effects of faba bean ( Vicia faba) varieties on the development of Bruchus rufimanus. Czech J. Genet. Plant Breed., 52: 22–29. The development of Bruchus rufimanus was assessed in randomised field trials from 2005 to 2007 with eight faba bean genotypes (SU 5/13, SU-BT, Mistral, Merkur, Stabil Merlin, Melodie, Divine). Significant differences, reproducible between the years, were found between the faba bean lines. The varieties most attractive to B. ru fimanus ovipositing females were SU-BT and Divine. Merkur showed a certain level of non-preference. The highest mortality rates of eggs and first instar larvae in pod valve tissues were recorded in Merkur (34–45%) and Divine (51–55%). The highest mortality rates of larvae and pupae during their development in seeds (effect of seed coat and cotyledon tissues) were recorded in Merkur (87–90%) and Melodie (87–99%). Parasitation by Triaspis thoracicus contributed to this mortality. The highest levels of B. rufimanus parasitation were found in SU-BT (32–35%), the lowest in Melodie (3–9%). The total reduction in Bruchus rufimanus individuals during their development was relatively high in all varieties, ranging from 72% to 99%.