گزارش وجود .Vorticella sp در عصاره ورمی‌کمپوست و تأثیر آن روی تخم و لاروهای سن دو نماتدهای ریشه‏گرهیMeloidogyne javanica وM. incognita

Ciliophora is a major component of the food chain in the aquatic habitats, and their feeding on the wastes of algae and bacteria is important in maintaining the balance of the ecosystems. The genus Vorticella is one the member of the phylum Ciliophora, That the effects of different factors such as culture media, nutritional and environmental conditions on their propagation have been investigated, but there is not much report on their effects on nematodes. Vorticella species are usually found in the freshwater environments, lakes, rivers with aquatic plant and in the environments containing degradable organic matter and bacteria. They attach to different surfaces in an aquatic environment by a stem. In the first report, Vorticella sp. was extracted from the soil and its association with nematodes was observed. Vorticella sp. did not show any host preference and was found attached to both plant parasitic and free-living nematodes. In this study, one species of Vorticella, which extracted from compost, was found attached to the eggs and second stage juveniles (J2) of Meloidogyne incognita and M. javanica. The compost extract with eggs and nematode juveniles was kept separately for three days at 35°C. It was observed that the population Vorticella sp. was low in the first day and increased in the second day. Vorticella sp. reduced hatching the eggs that were attached to them, but had less effect on J2s. On the third day, their adult population declined and became cysts. The role of Vorticella sp. in regulation of nematodes is not clear. It seems that the species of Vorticella be effective as a plant parasitic nematode control agent. Therefore, further researches on their cultivation and propagation, as well as on their effect on the activity of the nematodes are needed.