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The Asian citrus psyllid,Diaphorina citri , is the natural vector of the causal agent of Huanglongbing (HLB), or citrus greening disease. Together; HLB andD. citri represent a major threat to world citrus production. As there is no cure for HLB, insect vector management is considered one strategy to help control the disease, andD. citri viruses might be useful. In this study, we used a metagenomic approach to analyze viral sequences associated with the global population ofD. citri . By sequencing small RNAs and the transcriptome coupled with bioinformatics analysis, we showed that the virus-like sequences ofD. citri are diverse. We identified novel viral sequences belonging to the picornavirus superfamily, theReoviridae ,Parvoviridae , andBunyaviridae families, and an unclassified positive-sense single-stranded RNA virus. Moreover, aWolbachia prophage-related sequence was identified. This is the first comprehensive survey to assess the viral community from worldwide populations of an agricultural insect pest. Our results provide valuable information on new putative viruses, some of which may have the potential to be used as biocontrol agents.IMPORTANCE Insects have the most species of all animals, and are hosts to, and vectors of, a great variety of known and unknown viruses. Some of these most likely have the potential to be important fundamental and/or practical resources. In this study, we used high-throughput next-generation sequencing (NGS) technology and bioinformatics analysis to identify putative viruses associated withDiaphorina citri , the Asian citrus psyllid.D. citri is the vector of the bacterium causing Huanglongbing (HLB), currently the most serious threat to citrus worldwide. Here, we report several novel viral sequences associated withD. citri .

Diverse Array of New Viral Sequences Identified in Worldwide Populations of the Asian Citrus Psyllid (Diaphorina citri) Using Viral Metagenomics