Distribution of Meromyza flies (Diptera: Chloropidae) in the cereal crops of Mongolia

We have studied distribution of mass species of flies Meromyza acuminata and M. nigrofasciata on the cereal fields of Mongolia. By the beginning of July, coming from the areas near the industrial wheat fields, M. acuminata had dominated on those fields. M. nigrofasciata was found on wild cereals. The highest number of M. acuminata was on the wheat, less on the barley and rye. M. elongata few in number can compete with M. nigrofasciata. M. conifera was registered only on one wheat field together with M. acuminata and M. nigrofasciata. M. acuminata develops on Agropyron sp. (related genus to wheat) and easily migrates to cereal crops. In such a way, it realizes the same strategy as M. nigriventris (a mass pest of cereals) does in Europe.