Idenficaon of Delia spp. maggot = D. anqua bean seed maggot = D. florilega seed corn maggot = D. platura maggot = D. radicum (ex. brassicae) males vs. females

Male with clasper-like appendages Female with terminal slit or opening bent backward from p along underside of p of abdomen, p of at end of abdomen, somemes with flexible ovipositor protruding, p abdomen may appear bulbous generally conical Delia anqua– onion maggot larger-sized (larger or similar to D. radicum) , but overall much lighter colored (similar to D. platura), host: found only on

Best character is larger size (almost twice as large as platura/ florilega). Compared to platura, Top of head top of head between eyes more depressed depressed, “face” more protruding in front

Delia platura Top of head flaer

Front of head more protruding (wider gap Front of head between eye and Delia anqua less protruding frontal ridge) (narrower gap between eye and frontal ridge) Delia florilega – bean seed maggot – seed corn maggot Both species extremely similar in appearance and biology, but both generally smaller in size than D. anqua or D. radicum , found on many hosts Separang males:

middle leg middle leg

1st tarsal segment 1st tarsal segment with long bristles, 2x with short bristles, as long as tarsal about as long as width tarsal width

D. florilega - male D. platura - male Delia florilega – bean seed maggot Delia platura – seed corn maggot

Separang females:

Middle bia with 4 or fewer Middle bia with 5 or more bristles around middle bristles around middle (don’t count those at apex) (don’t count those at apex)

D. florilega - female D. platura - female – cabbage maggot

Slightly larger-sized than platura/florilega, darker-colored, very bristly appearing, hosts: only on plants in cabbage/mustard family

Females may be lighter colored. No good characters for female except palps are long and thin, legs brownish

Male – hind femur with long, disncve bristles at base (short or absent on other species)