The Detection and Molecular Characterization of a Phytoplasma Associated with Machorreo of Lulo (Solanum quitoense) in Colombia

This study is the first to report a phytoplasma associated with machorreo in lulo. We detected the presence of a phytoplasma in association with machorreo in lulo, using phylogenetic analysis and homology with the sequence of the 16S rRNA region and the gene tRNA. We identified the phytoplasma as belonging to the 16Sr III group (Xdisease; 97% homology). For future studies, we recommend identifying possible vectors through samplings of crop insects, particularly of the order Homoptera. Through molecular techniques, crop weeds should also be evaluated for their potential as hosts to the phytoplasma. Finally, as a possible management practice, resistance of promising lulo hybrids to machorreo should also be evaluated. • Oshima K; Shiomi T; Kuboyama T; Sawayanagi T; Nishigawa H; Kakizawa S; Miyata S; Ugaki M; Namba S. 2001. Isolation and characterization of derivative lines of the onion yellows phytoplasma that do not cause stunting of phloem hyperplasia. Phytopathology 91:1024–1029.