Horticulture
Department

Introduction

Biology

Damage

Cultural Control
coming soon

Biological Control

Chemical Control

References

Terminology

Links
coming soon

Acknowledgements

BIOLOGICAL CONTROL

Little is know about specific natural enemies associated with wooly ash aphid. Carver (1980) reports on a parasitic wasp, Aphelinus prociphili, of P. fraxinifolii (Riley) on ash in Iowa. Wu and Fang (1987) report of the importance of the predatory ladybeetle Callicaria superba Muls. The author's research has indicated there are a variety of natural enemies associated with this aphid. The natural enemy complex generally does not keep plant damage below an acceptable level in nursery production. The natural enemies we have seen associated with wooly ash aphid in Oregon are as follows:

• sryphid flies

• spiders

• ladybeetles

• parasitic wasps