Reported Resistance Case(s)

Species: merodon equestris

Order	Family	Common Name(s)	Group	Host
diptera	syrphidae	narcissus bulb fly	AG	narcissus

Active Ingredient: dieldrin

MOA: GABA-gated chloride channel antagonists, Cyclodiene organochlorines
Group: CYCLO	CAS #: 60-57-1	Shaugnessy Code: 45001

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G1062	1965	Field Evolved Resistance	United Kingdom	Woodville, H. C. (1965). Resistance of the large bulb fly (Merodon equestris F.) to aldrin.. Plant Path., 14 138-39.

*The population was created solely by selection and/or genetic manipulation.
**The population was selected further in the laboratory after collection.