AUTHOR=Aznar-Fernández Thaïs , Rubiales Diego 

TITLE=Flower and Pod Source Influence on Pea Weevil (Bruchus pisorum) Oviposition Capacity and Preference

JOURNAL=Frontiers in Plant Science

VOLUME=Volume 10 - 2019

YEAR=2019

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2019.00491

DOI=10.3389/fpls.2019.00491

ISSN=1664-462X

ABSTRACT=<p><italic>Bruchus pisorum</italic> is an insect pest causing major damage to pea seeds worldwide. Control is difficult and limited resistance is available. In this work we studied the effects of pollen and pod source on insect fecundity and oviposition by comparing resistant and susceptible <italic>Pisum</italic> spp. accessions and non-host (<italic>Lathyrus sativus</italic> and <italic>Vicia faba</italic>) species. A first no-choice assay revealed that the source of flower offered to adults for feeding might retard oviposition (the case of <italic>V. faba</italic>), reduce fertility (<italic>Pisum sativum</italic> ssp. <italic>syriacum</italic>, <italic>P. fulvum</italic>, and <italic>V. faba</italic>) or increase adult mortality (<italic>V. faba</italic> and <italic>P. sativum</italic> ssp. <italic>syriacum</italic>). A second no-choice assay with all adults fed with pollen of the same pea cultivar showed significant effect of the source of pods offered. Oviposition was reduced on pods of some resistant <italic>Pisum</italic> accessions, but particularly low on pods of the non-hosts, being retarded if ever happening and coupled with high mortality of adults. This was confirmed in a third experiment consisting on dual-choice assays showing reduced egg laying in <italic>V. faba</italic>, <italic>L. sativus</italic>, <italic>P. fulvum</italic>, and <italic>P. sativum</italic> ssp. <italic>syriacum</italic> compared to the commercial variety pea used as a control (Messire).</p>