Diet feeding assay having know concentrations of insecticidal protein. Rearing till pupation is important. Ensure the Plutella be parasitised just before initiation of assay.
Sir, it means we fed the known insecticidal protein to DBM larvae (2nd and 3rd instar) and placed into Cotesia plutellae jar for parasitization and finally watch the number of parasitized pupae we collect from the total released.