association of beet leafhopper (hemiptera: cicadellidae) with a clover proliferation group phytoplasma in columbia basin of washington and least 16 taxa of cicadellids and delphacids were tested by polymerase chain reaction (pcr) for the presence of a phytoplasma in the clover proliferation group, designated 16srvi. nucleic acid extracts from individual insects or groups of 5-10 were tested using pcr primers designed from the dna sequence of 16s-23s rrna or ribosomal protein genes of the pathogen. the beet leafhopper, circulifer tenellus (baker), was most often associated with the phytoplasma, with approximately 16% of the insec ...200515889714
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