Publications for:

pest = Helicoverpa (genus)
beneficial = Trichogrammatoidea simmondsi (parasitoid)

found 2 publications:

2001

Egg parasitoids for augmentative biological control of lepidopteran vegetable pests in Africa: Research status and needs
Insect Science and its Application (2001) 21 (3), 189-205
pestinfo wiki

1993

Incidence of Helicoverpa armigera (Lepidoptera: Noctuidae) and its natural enemies on smallholder crops in Kenya
Bulletin of Entomological Research (1993) 83 (3), 321-328
publishers website - pestinfo wiki