Abstract: In order to let more researchers and orange farmers realize the harm caused by Tylenchulus semipenetrans to citrus and management it,this paper reviews the occurrence and controlling of T. semipenetrans in citrus. With specialized parasitism and narrow host range, T. semipenetrans mainly infect genus citrus in the Rutaceae plants; its male does not harm the crop,but the females invaded from the front roots and fed through a fix feeding point. It caused wounds in citrus root cells and affected the distribution of reactive ions in roots and leaves,thus decreasing the citrus yield. Many molecular biology methods were proved to be effectively detect this nematode quickly,such as internal transcribed spacer-restriction fragment length polymorphism analysis (ITS-RFLP),ITS-specific primer detection,internal transcribed spacer-loop-mediated isothermal amplification analysis (ITS-LAMP),LAMP analysis based on nematode DNA,etc. The resistance T. semipenetrans have fewer citrus rootstocks,mainly controlled by chemical agents. However,due to the disadvantages of chemical agents that pollute the environment and need to be used repeatedly,the effective control of T. semipenetrans requires comprehensive use of agricultural control,chemical control,and biological control,plant extracts and resistant varieties and other measures. The host range,hazard characteristics,infection characteristics,pathogenic mechanism,molecular biological detection and control methods of T. semipenetrans were reviewed,and the future selection of citrus rootstock varieties through genetic engineering techniques was prospected. It is expected to provide a theoretical basis for the comprehensive management of T. semipenetrans in China.

Key words: Citrus, Tylenchulus semipenetrans, Pathogenic mechanism, Resistant varieties, Integrated pest management

CLC Number: 

• S433