Identification Of Garden Plant-parasitic Nematodes And Basal Research Of Nematicidal Drug Of Plant Extract

Species composition of plant-parasitic nematodes of garden trees in xiamen were investigated during 2005-2007.Lots of plant-parasitic nematodes had been found and 10 of them belonging to 7 genus,6 families,2 orders were observed and identified, including 2 new record species in China.These species are: Bitylenchus colombianus Siddiqi,1985 Tylenchorhynchus paranudus Phukan &Sanwal,1982 Tylenchorhynchus antarcticus W.M.Wouts,1981 Helicotylenchus dihystera(Cobb,1893)Sher,1961 Helicotylenchus microcephalus Sher,1966 Helicotylenchus pisi Swarup and Sethi,1968 Pratylenchus scribneri Steiner,1943 Criconema robusta Wang&wu,1993 Aphelenchus avenae Bastian,1865 Xiphinema diffusum Lamberti&Bleve-Zacheo,1979Among these, Tylenchorhynchus antarcticus Wouts,1981 and Xiphinema diffusum Lamberti&Bleve-Zacheo,1979 are 2 new record species in China.The 10 species of plant-parasitic nematodes were proved to be harmful to plants. But there are no obvious symptoms in the plants surveyed, the one reason is that the nematodes have week virulent while the trees have strong resistibility, and another reason is the quantity of population has not exceed the circumscription.Plant extracts of Ricinus communis, Solidago canadensis , Sapium sebiferum , Plumeria rubra, Lantana camara, Nicotiana alata et al were evaluated for their nematicidal effct against Meloidogyne incognita infecting tomato. The in vivtro experiment result showed that Lantana camara, Nicotiana alata, Solidago canadensis, llex latifolia possessed strong nematocidal activity,They killed more than 95% of J2 in 24h.And the pot experiment result also showed that Nerium indicum, Lantana camara, Melia azedarach, llex latifolia can reduce the root galls and eggs.