[Malacophagous aptitudes of some French Zonitidae snails and their advantage in biological control of Lymnaea (Galba) truncatula Müller (author's transl)].

Experimental study of malacophagous aptitudes of different species of french Zonitidea snails. Analysis of their possibilities of grouping with Zonitoides nitidus in order to get an association of complementary predators in biological control of Lymnaea truncatula. The experiences show that the numbers of surviving snails are next for the groups: Zonitoides-Oxychilus draparnaudi and Z.-Aegopinella. But Aegopinella migrates less from experimental areas. Proposition of a technique of biological control without environmental modification.