[Please note, this is a test version only. You may visit the current Orchard Pest Management pages at http://jenny.tfrec.wsu.edu/opm]
Scaeva pyrastri (Linneaus) Eupeodes volucris Osten Sacken (Diptera: Syrphidae)
HostsSyrphid fly larvae prey primarily on aphids of apples and stone fruit but also will attack other soft-bodied insects such as scales. Some species prey on thrips.
Egg: The egg resembles a small grain of rice. Eggs are laid singly on leaves, usually in or near an aphid colony. Larva: The larva is yellowish, legless and blind. It has a typical maggot shape, tapering to a point at the head end and broadly rounded at the rear. Its mouth has a triple-pointed dart with which it seizes and pierces its prey before sucking it dry. It has dark colored breathing tubes on the tail end.
Syrphid egg (E. Beers)
Adult: The adult superficially resembles a bee or wasp but has a more flattened body and, like other flies, only one pair of wings. It does not sting. It is usually yellow and black, and in some species the black parts have a greenish metallic sheen. It is 3/8 to 1/2 inch (10 to 12 mm) long. It is a fast and agile flyer, often hovering over plants.
Syrphid larva (E. Beers)
Syrphid fly adult (E. Beers, July 2007)