Liriomyza trifolii vector of Pseudomonas cichorii
Investigations in Canada revealed that adults of Liriomyza trifolii (EPPO A2 quarantine pest) are able to acquire and transmit Pseudomonas cichorii both in vitro from cultures of the bacteria and in situ from infected to non-infected chrysanthemums. 43% of the adult leafminers acquired the bacterium when exposed to it in culture jars. A mean of 7.9 bacterial leaf spots/plant was observed after an 48 h-exposure of healthy chrysanthemums to 10 adults of the leafminers which have previously been kept for 24 h on infected chrysanthemums. Larvae of L. trifolii acquired and transmitted P. cichorii as did adults when confined to culture jars.
Sources
Broadbent, A.B.; Matteoni, J.A. (1991) Acquisition and transmission of Pseudomonas cichorii by Liriomyza trifolii.
Proceedings of the Entomological Society of Ontario 122, 51.