Ecological investigation of the bean fly, Ophiomyia phaseoli (Tryon) (Diptera: Agromyzidae) and its natural enemies in Thailand.
The natural enemy complex of the agromyzid bean pest Ophiomyia phaseoli (Tryon) in Thailand was found to consist of 6 hymenopterous parasites, a nematode and a predatory ant. Of these, the eurytomid Plutarchia sp., a larval-pupal parasite, was considered to be the most important, and its biology was studied. Three generations of the parasite occurred during the growth of the bean crop, and its development was well synchronised with that of its host. However, it was not possible to evaluate the potential of this parasite as a biological control agent of the pest. The braconid Biosteres sp. was also considered to be of some importance, but was studied in less detail.