Enhancement of development and induction of resistance in tomato plants by the antagonist, Pythium oligandrum Gaétan Le Floch, Patrice Rey, Franck Déniel, Nicole Benhamou, Karine Picard and Yves Tirilly Agronomie, 23 5-6 (2003) 455-460 DOI: 10.1051/agro:2003018