When teaching singing clients, it is very important for speech therapists, singing teachers and choir conductors to work in close cooperation. To prevent any misunderstandings, the three professional groups should clarify the dividing-up of job responsibiities. Basic assumption is the healthy voice; …

Tomato varieties used at present for commercial production in Dutch glasshouses have a high density of glandular trichomes on the stem, but a very low density on the leaves. The two-spotted spider mite, Tetranychus urticae Koch, and the predatory mite, Phytoseiulus persimilis Athias-Henriot, usually …