Publications for:

pest = Helicoverpa (genus)
beneficial = Trichogramma thalense (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

1990

Parasitism of Heliothis zea (Lepidoptera: Noctuidae) eggs: Effect on pest management decision rules for processing tomatoes in the Sacramento Valley of California
Environmental Entomology (1990) 19 (3), 753-763
pestinfo wiki