Abstract: Model insect Drosophila melanogaster was exposed to its predatory natural enemy Harmonia axyridis to study the responses of the insect in its
development and fecundity. When the male and female D. melanogaster adults were separately exposed to H. axyridis, the lifespan of the males was significantly extended, while that of the females was less affected; when the male and female D. melanogaster adults were exposed together to H. axyridis, the development duration of D. melanogaster larvae and the lifespan of the males were prolonged. There were some changes in the development duration of successive stages when the 1st instar D. melanogaster larvae were exposed directly or indirectly to the predator, being significantly longer under indirect than under direct exposure. To our knowledge, this is the first report to observe the changes in the developmental duration and fecundity of female and/or male D. melanogaster exposed to H. axyridis.

Key words: Toxoptera aurantii, Sphaerophoria menthastri, Chrysopa septempunctata, Aphid-damaged tea shoots, Synomone