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Contents<br />

XIX<br />

23 Pros and Cons of Biological Control . . . . . . . . . . . . . 403<br />

Dirk Babendreier<br />

23.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 403<br />

23.2 Pros of Biological Control . . . . . . . . . . . . . . . . . . . 404<br />

23.3 Cons of Biological Control . . . . . . . . . . . . . . . . . . . 405<br />

23.3.1 Weed Biological Control . . . . . . . . . . . . . . . . . . . . 405<br />

23.3.2 Arthropod Biological Control . . . . . . . . . . . . . . . . . 406<br />

23.4 Harmonia axyridis, a Case Study . . . . . . . . . . . . . . . 408<br />

23.5 Why Has H. axyridis Become Invasive? . . . . . . . . . . . . 411<br />

23.6 How to Avoid ‘Harmonia Cases’? . . . . . . . . . . . . . . . . 412<br />

23.7 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . 415<br />

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416<br />

24 General Conclusion, or what Has to be Done now? . . . . . . 419<br />

Wolfgang Nentwig<br />

24.1 Need for more Research . . . . . . . . . . . . . . . . . . . . 419<br />

24.2 Management from Detection to Eradication or Control . . . 420<br />

24.3 Technical Solutions . . . . . . . . . . . . . . . . . . . . . . . 421<br />

24.4 Legislation and Administration . . . . . . . . . . . . . . . . 422<br />

24.5 Socio-Economy and Education . . . . . . . . . . . . . . . . 423<br />

Subject Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425

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