Abstract
This study investigates the larvicidal activities of plant extracts and tannins against wood-damaging insects. Scots pine (Pinus sylvestris), beech (Fagus orientalis), and poplar wood (Populus tremula) were subjected to larvae of Spondylis buprestoides (Coleoptera: Cerambycidae) by impregnating them with mimosa (Acacia mollissima), quebracho (Schinopsis lorentzii) and redpine bark (Pinus brutia) extracts. At the end of the 6-month experiment, the numbers of dead and live larvae as well as the mean mass losses of woods were determined. In terms of wood species, the lowest larva resistance was observed in Scots pine wood, while the highest larva resistance was achieved by beech wood. The lowest mass losses and the highest dead termite rates in all tree species were observed when the concentration of mimosa and quebracho extracts was 12%. On the other hand, the pine bark extract showed a lower larvicide effect than the other two extracts.
Highlights
Wood being a biological material is readily degraded by fungi and termites (Syofuna et al 2012) but, one of the most important causes of damage to wood materials is insects
The objective of this study was to investigate the larvicidial effects of mimosa, quebracho and pine bark extract against Spondylis buprestoides insect larvae
Wood samples used for insect test were prepared using Scots pine (Pinus sylvestris L.) (SP), beech (Fagus orientalis L.) (B), and poplar (Populus tremula L.) (P) sapwoods in 50 x 25 x 15 mm dimensions, in accordance with the TS 5564 EN 47 standard
Summary
Wood being a biological material is readily degraded by fungi and termites (Syofuna et al 2012) but, one of the most important causes of damage to wood materials is insects. Wood materials damaged by insects result in both technical and economic losses (Ssemaganda et al 2011). Over the past 60 years, numerous synthetic insecticides have been developed and used. Many countries have partially restricted or completely forbidden the use of synthetic insecticides because of their harmful effects against human health and the environmental pollution including genetic resistance of pest species, threat to wild life, motivation by weather, hazards from handling (Khatun et al 2011, Franzen 1993, Rembold 1993, Şen et al 2009). Studies were concentrated on developing environmentally friendly wood preservations (Tascioglu et al 2013). In this regard, plant extracts and tannins can be useful and effective against wood-damaging insects
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