Trophic diapause in the tropical coccinellid Harmonia sedecimnotata (Fabr.) (Coleoptera, Coccinellidae): the induction and reactivation.

摘要

Food deficiency results only in the retardation of the oocyte maturation in ovipositing females of H. sedecimnotata, and it is only a complete lack of protein-rich food (aphids) that leads to trophic reproductive diapause, characterized by the cessation of oogenesis at the stage of the oogonia maturation. Reactivation from the trophic diapause is possible only upon resumption of feeding on a protein-rich food irrespective of its amount, which influences only the number of eggs laid.