Bioresources of Termiticides from Junipers. Phase 1

摘要

The purpose of the research was to determine the termiticidal activities in various extractive fractions from juniper wood and leaves. No choice, treated paper trials showed termiticidal activities in: hexane extracts from the heartwood of both species and in the methanol extract from the J. virginiana wood; hexane extracts from the leaves of both species and in the methanol extract from J. virginiana leaves. Next, the extracts were impregnated into yellow pine blocks at known concentrations. No choice trials revealed that the highest termiticidal activities were in: hexane leaf extract and volatile leaf oil of J. virginiana and the methanol extract from the wood of J. virginiana. Choice trials (treated and untreated blocks available for feeding) resulted in a few termites being killed but also showed that almost all the juniper extracts have anti-feedant properties, as the termites generally avoided the treated blocks. Because the hexane leaf extracts contain considerable waxes, treating wood with these extracts renders wood water-proof, which presents another defense against termites and rotting.