Entonem keeps young orchids free from fungus gnats
that are on the leaves. A while later, I collect a few drops of drainage water from underneath the treated crop. I examine this under a microscope to check [...] check for the presence of nematodes. If I can see them this means that the spraying was successful.’ A high standard To prevent damage to the young plants [...] pursue a strict preventive policy. ‘We have set a very high standard,’ say Van de Wel, Veldhuijs, and Mulder. ‘Our dosages and introductions have therefore