Pakchoi (Brassica rapa subsp. chinensis) often experiences reduced productivity due to attacks by Plutella xylostella, which can cause damage levels of 30–90% during the growth phase. The purpose of this reasearch was to determine the attraction of the parasitoid Trichogramma to P. xylostella eggs placed on pakchoi plants that had been induced by the entomopathogenic fungus Penicillium citrin…