Prevent clean ground becoming infected again immediately : Maurice van Os: 'Steaming only is not enough'

Chrysanthemum grower Maurice van Os, like many Dutch colleagues, has a problem with thrips in the nursery. He solves it mainly by using Amblyseius swirskii, supplemented with Amblyseius cucumeris in the cold season. He steams to control primarily Fusarium, nematodes and Rhizoctonia. Good hygiene practice during steaming and the stimulation of soil life after steaming are also necessary, he says.