Fumigant toxicity and physiological effects of spearmint (Mentha spicata, Lamiaceae) essential oil and its major constituents against Reticulitermes dabieshanensis

•Spearmint EO and its major constituents have toxic effects on R. dabieshanensis.•The toxic efficacy increased with increasing temperature against R. dabieshanensis.•Carvone highly synergized the toxicity of limonene and dihydrocarvone.•All treated termite showed the increased activity of detoxifying enzymes.•Spearmint EO and its constituents inhibited activity of AChE in vivo and in vitro.