Publications for:

pest = Helicoverpa (genus)
crop = Lettuce (Lactuca)

found 2 publications:

2007

Life history of Helicoverpa armigera (Lepidoptera: Noctuidae) on cabbage lettuce at various temperatures
Plant Protection Bulletin (Taipei) (2007) 49 (1), 27-37
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1989

Population dynamics of Heliothis virescens and H. zea (Lepidoptera: Noctuidae) in the Imperial Valley of California
Environmental Entomology (1989) 18 (6), 970-979
pestinfo wiki