Progresses in Study of Cross Protection Against Citrus tristeza virus Suppression and Sequence Variation of Citrus tristeza virus Genotypes by Citrus Cultivars Effect of virus sources and host plants on the transmissibility of Citrus tristeza virus by single aphid of Toxoptera citricida Studies on the Simultaneous Detection of Citrus Huanglongbing Pathogen,Citrus exocortis viroid, Citrus tristeza virus by Multiplex RT-PCR Studies on the Simultaneous Detection of Citrus Huanglongbing Pathogen,Citrus exocortis viroid, Citrus tristeza virus by Multiplex RT-PCR Progresses in Study of Cross Protection Against Citrus tristeza virus EPG analysis of feeding behavior of three aphids on Citrus reticulate Influences of the quantity of Citrus tristeza virus on transmissibility by different aphid species Transcriptomic Responses of Poncirus trifoliata to Citrus tristeza virus(CTV)Infection Influence of Fenghuang Pummelo on the Composition of Citrus tristeza virus Isolates Collected from Sweet Orange Influence of Fenghuang Pummelo on the Composition of Citrus tristeza virus Isolates Collected from Sweet Orange Monitoring the Temporal Change of the Mild and Severe Strain of Citrus tristeza virus by Real-time RT-PCR Transcriptomic Responses of Poncirus trifoliata to Citrus tristeza virus(CTV)Infection Simultaneous and Rapid Detection of Four Important Graft\|transmissible Pathogens of Citrus by Multiplex PCR Monitoring the Temporal Change of the Mild and Severe Strain of Citrus tristeza virus by Real-time RT-PCR