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Fig. 6. D. dipsaci fourth-stage larvae (L4s) allowed to dry on a coverslip
and then imaged through the coverslip using DIC optics on a Zeiss
photomicroscope using a x100 objective lens (A) or using confocal
microscopy and reflected laser light (B). Oily material is observed between
the nematodes and the coverslip (arrow in A) or smeared from the surface of
the nematodes, as a result of their movement (arrow in B). Scale bars, 10
µm.