Reported Resistance Case(s)

Species: tychius picirostris

Order	Family	Common Name(s)	Group	Host
coleoptera	curculionidae	clover seed weevil	AG	clover

Active Ingredient: DDT

MOA: Sodium channel modulators, Pyrethroids, Pyrethrins, DDT
Group: OCL	CAS #: 50293	Shaugnessy Code: 29201

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G620	1965	Field Evolved Resistance	USA-- Idaho	Johansen, C. (1965). Bee poisoning versus clover seed weevil control in white dutch clover grown for seed.. J. Econ. Entomol., 58 857-63.
G450	1974	Field Evolved Resistance	USA-- Washington	Anon. 1974g. (1974).

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