Monster From Green Hell (1957)

The U.S. government conducts experiments on the effects of exposure to space radiation by sending animals briefly into orbit. Following a malfunction, one of the rockets stays in space longer than planned and is lost from the scientists' radar screens. Later, Dr. Brady (Jim Davis), one of the rocket scientists, reads a news report about strange occurrences in Central Africa. Theorizing that it may be the irradiated test wasps wreaking havoc in the jungle, he organizes an expedition to investigate. Also stars Robert Griffin, Joel Fluellen. Also with Barbara Turner.