First report of Tapinolachnus lacordairei (Coleoptera: Cerambycidae) damage in Chukrasia tabularis
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First report of Tapinolachnus lacordairei (Coleoptera: Cerambycidae) damage in Chukrasia tabularis N. M. Chi 1
&
N. V. Thanh 1 & D. N. Quang 1 & L. B. Thanh 2 & D. V. Thao 3 & L. T. Son 2 & T. X. Hinh 1 & P. Q. Thu 1 & B. Dell 4
Received: 25 May 2020 / Accepted: 14 September 2020 # African Association of Insect Scientists 2020
Abstract Chukrasia tabularis (Meliaceae) has been planted for many decades in home gardens and plantations in Vietnam. Recently, growers have become concerned with attack by stem borers. Tapinolachnus lacordairei J. Thomson 1864 (Coleoptera: Cerambycidae) is identified as a new indigenous pest causing damage to 15 to 30 year-old stands of C. tabularis in Tuyen Quang, Hoa Binh and Thanh Hoa provinces. The leaves of infested trees prematurely senesce or wilt followed by tree death. In 2019, the infestation level was 12.5–22.5% and the damage index was 0.33–0.55. Adults emerge from February to May, mate within 1–3 days and the females lay 20–40 eggs on the bark of healthy and infested trees. The larvae feed first in the phloem and sapwood, and then in the heartwood where they make pupal chambers. Larvae take up to one year to become fully grown. To mitigate against further loss of C. tabularis, cost-effective control strategies need to be developed and steps taken to reduce the risk of dispersal of the pest beyond its native range in SE Asia. Keywords Chukrasia tabularis . Longhorn beetle . Meliaceae . Tapinolachnus lacordairei . Vietnam
Introduction Chukrasia tabularis, a valuable timber species in the mahogany family (Meliaceae), is native to South/Southeast Asia and southern China (Kalinganire and Pinyopusarerk 2000; Nguyen 2007) where it can attain a height of 25 to 40 m and a bole diameter of 1.2 to 2.0 m (Kalinganire and Pinyopusarerk 2000). The wood has high economic value (Nguyen 2007) due to its high density (Ho and Noshiro 1995) and attractive grain; is popular for processing into high quality furniture and
All authors contributed equally to this work. * N. M. Chi [email protected] 1
Forest Protection Research Centre, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
2
Vietnam National University of Forestry, Hanoi, Vietnam
3
Thai Nguyen University of Agriculture and Forestry, Thai Nguyen province, Vietnam
4
School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA 6150, Australia
building materials (Gunn et al. 2006; Nguyen et al. 2010); and the value of sawn boards is about 750–850 USD/m3 (Kien and Harwood 2017). In addition, the tree is grown in some places for the production of biopesticides (Kaur and Arora 2009). For about five decades, C. tabularis has been planted in home gardens and plantations in Vietnam (Nguyen et al. 2010) where they are mostly harvested 20–25 years after planting (Nguyen 2007; Nguyen et al. 2010). As with some other species in the Meliaceae (Khaya senegalensis, Melia azedarach, Swietenia mahagoni and Toona suremi), C. tabularis is susceptible to shoot tip damage from Hypsipyla robusta (Gunn et al.
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