The role of Acanthospermum hispidum in the phenology of Euschistus heros and of Nezara viridula.
Laboratory, greenhouse and field studies with the pentatomids Euschistus heros and Nezara viridula in Paraná, Brazil, demonstrated greater survival and longevity with E. heros than N.viridula when fed the weed Acanthospermum hispidum. Neither species reproduced on the weed. The pentatomids moved from soyabeans to A. hispidum mainly during mid-March to mid-April when soyabean plants matured. The results suggest that A. hispidum functions as a temporary food plant providing water and nutrients to the 2 pentatomid pests of soyabeans.