Carrots (Daucus carota L. Him) are now widely grown and consumed worldwide due to their nutritional value and high medical value (Chen et al., 2016). In Vietnam, Lam Dong and Hai Duong have the largest area of cultivation. However, in carrot-grown areas, the damage caused by plantparasitic nematodes (PPNs) has had a negative effect on quality and productivity. Currently, researches of the PPNs on carrots are relatively limited in Vietnam. In order to prevent harmful PPNs on carrots, chemical nematicides are still the prevalent choices. However, the abuse of harmful chemicals has been causing negative effect to environment, human health and other organisms (Meira et al. 2006). Biological measures are one of the effective measures to prevent PPNs and are of environmental safety (Perry & Moens, 2013). Therefore, it is necessary to select environmentally friendly biological products for nematode control. For the purpose of studying the PPN species composition and important nematode groups on carrots, assessing biological products for their control to provide a basis for the management of PPNs on carrots, we carry out the research project: “Plant-parasitic nematodes on carrots in Vietnam and testing biological measures in controlling them”