Abstract Wood and bark extracts from balsam fir, red cedar, spruce, hemlock, and pine were assayed for juvenile hormone-mimicking activity on pupae of the wax moth. All the extracts showed noticeable activity; the wood extracts were generally more active than the bark extracts. The results suggest that the purification of the extracts from these conifers might lead to the isolation of compounds with high hormone-mimicking potential.
