Ephedrus cerasicola
still present. If the aphid species present is known it might be better to switch to an appropriate single species product ( Aphilin , Aphipar , Aphipar-M [...] depends on climate, crop and aphid density and species, and should always be adjusted to the particular situation. Start introduction preventively soon after [...] per m 2 . This is equivalent to one unit every 250-350 m 2 . The parasitic wasps will emerge within 2 weeks. Releases should be repeated when aphids are still