Microbial impact of the pesticide chlorpyrifos on Swedish and Italian biobeds Costantino Vischetti, Laura Coppola, Elga Monaci, Alessandra Cardinali and Maria d.P. Castillo Agron. Sustain. Dev., 27 3 (2007) 267-272 Published online: 09 June 2007 DOI: 10.1051/agro:2007020