Publications for:

pest = Helicoverpa zea
crop = Tomato (Solanum lycopersicum)
country = U.S.A. (Hawaii)

found 2 publications:

Effects of insecticide use on abundance and diversity of tomato pests and associated natural enemies in Hawai'i
Proceedings of the Hawaiian Entomological Society (1995) 32, p. 45
pestinfo wiki

Biological control of Helicoverpa zea (Lepidoptera: Noctuidae) with Steinernema carpocapsae (Rhabditida: Steinernematidae) in corn used as a trap crop
Environmental Entomology (1992) 21 (6), 1441-1447
pestinfo wiki