Liriomyza sativae on green onion
Liriomyza sativae (EPPO A1 pest) has been found infesting green onion (Allium cepa var. aggregatum) in the main production area of this crop in Hawaii, US. Laboratory studies on the host-plant preferance in comparison with L. sativae collected from conventional hosts from another region showed the leafminers from onion had broadened their host range to include green onion.
The authors assume that the expansion of the L. sativae host range to green onion is a significant sign since it would support the hypothesis that the leafminer may infest new and atypical host plants in areas where it has been or may be introduced.
Sources
Carolina, J.; Herr, C.; Johnson, M.W. (1992) Host plant preference of Liriomyza sativae (Diptera: Agromyzidae) populations infesting green onion in Hawaii.
Environmental Entomology 21, 1097-1102.