Abstract: The container for delivery of ichneumon flies consists of ichneumon fly eggs and two biodegradable plastic parts (2,3) that are interlocked with one another. The ichneumon fly eggs are stuck on an inner wall (19) of the container. The container (1) is provided with at least one emergence opening (13), preferably a slit, of sufficient size for emergence of the hatched ichneumon flies. This container is rigid and enables automatic filling and delivery of the ichneumon flies by dropping the containers from a magazine, for example using small airplanes or model airplanes. The container decomposes after the container has been ploughed into the ground. A method of agricultural pest control using the containers is also part of the invention.