Apricot in California > Deficiencies & Pests > Insect, Mite & Nematodes Some rootstocks commonly used in apricot orchards are susceptible to nematode species, including root lesion (Pratylenchus vulnus), dagger (Xiphinema americanum), and ring (Mesocriconema xenoplax) and root knot (Meloidogyne) nem...