oa Journal of the Entomological Society of Southern Africa - The influence of host-plant location on the incidence and impact of Trichapion lativentre (Coleoptera: Apionidae), a biocontrol agent of Sesbania punicea (Fabaceae)



Adults of a florivorous apionid weevil, Tnchapion lativentre (B�guin Billecocq), aggregate in dense thickets of their host plant, a leguminous weed, Sesbania punicea (Cav.) Benth., and are less abundant on isolated plants growing on the periphery of thickets. As a result, peripheral plants suffer less damage and set more seed than those growing in thickets. This trend slightly reduces the biocontrol effectiveness of T. lativentre and enhances the importance of additional supplementary agents.


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