A investigation of plant diseases and insect pests was carried out in Baoan region,Shenzhen City,the causes and characteristics were analyzed.The results showed that there are 50 types of diseases,including fungal disease 26,bacteria disease 7,virus disease 5,nematodiasis 12;insect pest 37,belonging to 7 mesh and 27 families.Some diseases have serious effects on vegetable,flower and fruit tree production.

During 2008-2011,a survey of ornamental and vegetable nematodes was carried out in Baoan.A total of 98 samples were collected from horticultural farm and vegetable field,and 13 genera plant nematodes from ten family were extracted and identified,which are Filenchus,Rhabdotylenchus,Tylenchus,Ditylenchus,Tylenchorhynchus,Pratylenchus,Radopholus,Helicotylenchus,Rotylenchulu,Meloidogyne,Paratylenchus,Aphelenchu s and Aphelenchoides.Among them,Meloidogune、 Ditylenchus、 Pratylenchus、 Rotylenchulus、Helicotylenchus、 Rotylenchulus and Radopholus are important parasites of plant in Baoan.