First report of Xiphinema rivesi Dalmasso, 1969 on citrus in northern Egypt

摘要

In a survey, specimens of dagger nematode (Xiphinema sp.) were collected from soil around the rhizosphere of citrus trees (Citrus sinensis (L.) Osbeck) with poor growth appearance and low yield from EL-Nobarria, EL-Behera govemorate, northern Egypt, during 2012-13. Dagger nematode (Xiphinema rivesi Dalmasso, 1969) was identified on morphology of females that included female body and total stylet (odontostyle and odontophore) length, location of guiding ring and excretory pore from oral aperture, shape of head and tail including various tail measurements and vulva percentage in relation to body length. This is the first report of this nematode from Egypt, Africa. The values of the morphological parameters completely fall within the previously reported ranges for X rivesi.