University of Idaho Pest Management Center

*Root Maggots*
*species:*	cabbage root maggot onion root maggot seedcorn root maggot ORDER: Diptera - rasping mouthhooks pests as immatures
*identification:*
adults	gray, bristly flies smaller than common house fly
larvae	whitish, fleshy, legless, wedge-shaped grubs
symptoms:
above ground	wilting (especially during dry weather), yellowing, stunting
below ground	root feeding, tunnels, secondary root rots
increased susceptibility	seedlings, cool wet springs, high organic matter in soil
biology:	O/W as eggs, nymphs, adults many offspring, short-generation time, asexual reproduction
CONTROL OPTIONS
physical:	protect with polyester-fiber row covers aluminum foil collars spray forcefully with garden hose yellow sticky traps
cultural:	proper N fertility compost culls
biocontrol:	conserve natural enemies mass-releases from commercial insectaries
least-toxics:	insecticidal soap pyrethrin superior summer oil neem
conventional insecticides:	Cygon, diazinon, malathion, Thiodan

ALWAYS READ THE LABEL--
THE LABEL ALWAYS TAKES PRECEDENCE OVER ANY RECOMMENDATION

Webmaster:
nbell@uidaho.edu