Reported Resistance Case(s)

Species: rhyzopertha dominica

Order	Family	Common Name(s)	Group	Host
coleoptera	bostrichdae	lesser grain borer	AG	stored grain, rice, sorghum

Active Ingredient: spinosad

MOA: Nicotinic Acetylcholine receptor agonists (allosteric), Spinosyns
Group: SPIN	CAS #: 0	Shaugnessy Code: 0

Resistance Case(s)

Case Id	Year of Report	Type of Resistance	Location	Reference
G23591	2025	Lab selected*	Taiwan-- Taichung-- Taichung	Wang, Y.-C., Chen, Y.-C., Chen, C.-Y., and Chen, M.-E. (2025). Resistance reduction and cross-resistance of spinosad-resistant Rhyzopertha dominica (Coleoptera: Bostrichidae) and the association between spinosad resistance and maltase activity. Pest Management Science, 81.

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