Diachasmimorpha longicaudata is a solitary species of parasitoid wasp and an endoparasitoid of tephritid fruit fly larvae.

It is now considered the most extensively used parasitoid for biocontrol of fruit flies in both the southern portion of the United States and Latin America.

[1] D. longicaudata is especially useful for agricultural purposes in the control of fruit flies as it is easily mass-reared and has the ability to infect a variety of hosts within the genus Bactrocera.

[2] D. longicaudata has been disseminated into countries in the Americas including United States, Colombia, Costa Rica, Guatemala, El Salvador, Nicaragua, and Trinidad, and Brazil.

[6] Three cryptic species have been identified within D. longicaudata based on genetic analysis and geometric differences in wing venation.

[4] In forced-contact mating between the three cryptic species reproduction was rare and resulted in sterile female offspring.

Typically only one egg is laid per instar larvae with exceptions when hosts are insufficient; however only one pupa will reach maturity.