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27-08-2019 | Original | Issue 6/2019

European Journal of Wood and Wood Products 6/2019

Understanding relationship between the wood quality parameters and susceptibility of Pinus taeda to pine decline

Journal:
European Journal of Wood and Wood Products > Issue 6/2019
Authors:
Charles Essien, Pratima Devkota, Brian K. Via, Lori G. Eckhardt
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Abstract

Pinus taeda (loblolly pine) is one of the ecologically and economically important conifer species in the southeastern USA. However, a disease decline syndrome, southern pine decline (SPD), associated with beetle-vectored root-infecting fungi, has emerged as one of the major challenges confronting loblolly pine production in this part of the country. Although several studies have been conducted to screen the susceptibility of the commercially grown families to these fungi, little information exists on wood properties associated with the susceptible and resistant families. Thus, the objectives of this study were (1) to understand variation in wood quality parameters among the families regarded as susceptible and tolerant to SPD, (2) to evaluate the utility of acoustic tool to differentiate between those families. The results indicated the velocity, fiber length, microfibril angle and slenderness of the susceptible families are comparable or superior to those of the tolerant families. The mean error rate of classification associated with acoustic tool ranged from 35 to 40% depending on the distance between the transmitter and receiver probes. The mean error rate of classification was 35% when probes were placed 120 cm apart. The results from this study signify that a family tolerant to pine decline is not synonymous to a quality wood family and possibility of using acoustic tools to allocate pine species into PD susceptibility classes.

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