Impact of sown fallows on the Xiphinema index populations in different soil types Coralie Laveau, Séverine Mary, Guillaume Darrieutort, Cornelis van Leeuwen and Maarten van Helden E3S Web Conf., 50 (2018) 01037 Published online: 22 August 2018 DOI: 10.1051/e3sconf/20185001037