SYRPHID FLIES Diptera: Syrphidae Syrphus Spp., Allograpta Spp

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SYRPHID FLIES Diptera: Syrphidae Syrphus Spp., Allograpta Spp

Modified from Ralph E. Berry. 1998©. Insects and Mites of Economic Importance in the Northwest. 2nd Ed. 221 p. SYRPHID FLIES Diptera: Syrphidae Syrphus spp., Allograpta spp. ______________________________________________________________________________________ DESCRIPTION Adults are 10 to 12 mm long marked with yellow, black, or white bands resembling bees or small yellowjackets. They fly swiftly and tend to hover over plants (also call hover or flower flies). Adults feed only on pollen, nectar, or honeydew produced by aphids. Larvae are about 12 mm long, wrinkled or slug-like, and tapered to a point anteriorly. They are usually brown or green with whitish areas. Eggs are chalky-white with faint longitudinal ridges and are laid singly among aphid colonies. LIFE HISTORY Syrphid fly adult Syrphid flies overwinter as pupae in the soil. Adults begin emerging in April and May about the same time as aphid populations begin to increase. They lay eggs on leaves and stems of plants infested with aphids or other suitable prey. Eggs hatch in 3 to 4 days into soft-bodied maggot-like larvae. Larvae feed for 7 to 10 days, then drop to the soil to pupate. A life cycle from egg to adult is completed in 16 to 28 days and there are three to seven overlapping generations each year. IMPORTANCE Syrphid fly larva Larvae feed on soft-bodied insects, particularly aphids. As many as 400 aphids may be consumed by one larva during its development period. Larvae SYRPHID FLIES seize aphids with their mouth hooks and suck out the body contents. These predators are common in most PUPAE field and vegetable crops and may be important in ADULTS suppressing aphid populations if unnecessary EGGS applications of nonselective insecticides are avoided. LARVAE Two common species of syrphid flies occur in the PUPAE northwest: the western syrphid, Syrphus opinator and Scaeva pyrastri, and botrh species are commonly J F M A M J J A S O N D Months found in mint fields. [Return to Insect Management] [Home].

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Biodiversity of the Natural Enemies of Aphids (Hemiptera: Aphididae) in Northwest Turkey
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SYRPHID FLIES Diptera: Syrphidae Syrphus Spp., Allograpta Spp. DESCRIPTION LIFE HISTORY IMPORTANCE
Modified from Ralph E. Berry. 1998©. Insects and Mites of Economic Importance in the Northwest. 2nd Ed. 221 p. SYRPHID FLIES Diptera: Syrphidae Syrphus spp., Allograpta spp. ___________________________________________________________________________ DESCRIPTION Adults are 10 to 12 mm long marked with yellow, black, or white bands resembling bees or small yellowjackets. They fly swiftly and tend to hover over plants (also call hover or flower flies). Adults feed only on pollen, nectar, or honeydew produced by aphids. Larvae are about 12 mm long, wrinkled or slug-like, and tapered to a point anteriorly. They are usually brown or green with whitish areas. Eggs are chalky-white with faint longitudinal ridges and are laid singly among aphid colonies. Syrphid fly adult LIFE HISTORY Syrphid flies overwinter as pupae in the soil. Adults begin emerging in April and May about the same time as aphid populations begin to increase. They lay eggs on leaves and stems of plants infested with aphids or other suitable prey. Eggs hatch in 3 to 4 days into soft-bodied maggot-like larvae. Larvae feed for 7 to 10 days, then drop to the soil to pupate. A life cycle from egg to adult is completed in 16 to Syrphid fly larva 28 days and there are three to seven overlapping generations each year. SYRPHID FLIES IMPORTANCE PUPAE Larvae feed on soft-bodied insects, particularly ADULTS aphids. As many as 400 aphids may be consumed by EGGS one larva during its development period. Larvae LARVAE seize aphids with their mouth hooks and suck out the PUPAE body contents. These predators are common in most J F M A M J J A S O N D field and vegetable crops and may be important in Months suppressing aphid populations if unnecessary applications of nonselective insecticides are avoided.
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Diptera, Syrphidae)
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