Publications for:

pest = Helicoverpa (genus)
beneficial = Trichogramma brassicae (parasitoid)

found 2 publications:

2010

Effect of host change on demographic fitness of the parasitoid, Trichogramma brassicae
Journal of Insect Science (2010) 10 (78), 1-12
publishers website - pestinfo wiki

1999

Do sympatric Trichogramma species parasitize the pest insect Helicoverpa armigera and the beneficial insect Chrysoperla carnea in different proportions?
Entomologia Experimentalis et Applicata (1999) 92 (1), 101-107
publishers website - pestinfo wiki