Hazard Analysis of Anoplophora chinensis and Early Comprehensive Selection of Betula alnoides Provenances in Northern Guangdong Province

ZHAO Zhi-gang; ZHANG Chao-bin; QIU Ying-hua; GUO Jun-jie; HE Yong-jia; WENG Qi-jie; ZENG Jie

Betula alnoides Buch.-Ham. Ex D.Don is a fast-growing and precious tree species in tropical and warm subtropical regions. The wood borer damage has recently been one of key factors limiting the large-scale expansion of B. alnoides plantations. A trial including 26 provenances and 322 families were established at Shaoguan State-owned Forest Farm in northern Guangdong Province, which were suffered from heavy damage of wood borers within two years after planted. The growth performance and resistances to wood borers of B. alnoides were investigated for the purpose of early selection of germplasm. The results showed that there were significant differences among provenances in height and base diameter (PB. alnoides. Anoplophora chinensis (Förster) was the principal species of wood borer, which damaged trunk within the height of 20 cm above stem base. 1-5 larva of this species were found on each tree attacked, and the attack rate by A. chinensis was significantly and positively related to the diameter growth (P＜0.05). The attack rate showed no significant difference among provenances (P＞0.05), and the mean attack rates for one-year-old and two-year-old B. alnoides trees were 48.21% and 36.27%, respectively. Early selection of B. alnoides provenance was carried out based on its growth performance and the attack rate by the wood borers. These findings could be contributive to understand the occurrence of A. chinensis, protect from its damage, and provide evidences to select germplsm of B. alnoides with good growth performance and strong resistance to A. chinensis in northern Guangdong and surrounding areas with similar environment.

1. Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China

2. Shaoguan State-owned Forest Farm, Shaoguan 512023, Guangdong, China

Received Date: 2010-12-20

Available Online: 2011-12-13

Abstract: Betula alnoides Buch.-Ham. Ex D.Don is a fast-growing and precious tree species in tropical and warm subtropical regions. The wood borer damage has recently been one of key factors limiting the large-scale expansion of B. alnoides plantations. A trial including 26 provenances and 322 families were established at Shaoguan State-owned Forest Farm in northern Guangdong Province, which were suffered from heavy damage of wood borers within two years after planted. The growth performance and resistances to wood borers of B. alnoides were investigated for the purpose of early selection of germplasm. The results showed that there were significant differences among provenances in height and base diameter (PB. alnoides. Anoplophora chinensis (Förster) was the principal species of wood borer, which damaged trunk within the height of 20 cm above stem base. 1-5 larva of this species were found on each tree attacked, and the attack rate by A. chinensis was significantly and positively related to the diameter growth (P＜0.05). The attack rate showed no significant difference among provenances (P＞0.05), and the mean attack rates for one-year-old and two-year-old B. alnoides trees were 48.21% and 36.27%, respectively. Early selection of B. alnoides provenance was carried out based on its growth performance and the attack rate by the wood borers. These findings could be contributive to understand the occurrence of A. chinensis, protect from its damage, and provide evidences to select germplsm of B. alnoides with good growth performance and strong resistance to A. chinensis in northern Guangdong and surrounding areas with similar environment.

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Hazard Analysis of Anoplophora chinensis and Early Comprehensive Selection of Betula alnoides Provenances in Northern Guangdong Province

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