Xylosandrus discolor (Blandford)

Beaver, R. A., Sittichaya, W. & Liu, L-Y., 2014, A Synopsis of the Scolytine Ambrosia Beetles of Thailand (Coleoptera: Curculionidae: Scolytinae), Zootaxa 3875 (1), pp. 1-82 : 70

155. Xylosandrus discolor (Blandford)

Xyleborus discolor Blandford, 1898: 429 .

Xylosandrus discolor (Blandford) : Browne, 1963:55.

Thai distribution: C: Nakhon Nayok ; N: Chiang Mai ( Beaver & Browne 1975); N–E: Chaiyaphum, Ubon Ratchathani; S: Chumphon, Nakhon Sri Thammarat, Surat Thani .

New records: Chaiyaphum, Pa Hin Ngam NP, 15° 34.802' N, 101° 25.99' E, 430 m, dry evergreen forest near waterfall, pan trap, 13–14.xi.2006 (K. Sa-nog & B. Adnafai) (1); as previous except: 15° 40.232' N, 101° 26.942' E, 398 m, deciduous forest near stream, MT, 13–19.vi.2007 (1); Tat Tone NP, Sab Somboon forest unit, 16° 1.059' N, 101° 58.603' E, 674 m, dry dipterocarp forest near swamp, pan trap, 6–7.xi.2006 (T. Jaruphan) (1); Chiang Mai, Maerim, various collection methods, ex mango ( Mangifera ) and Michelia , various dates from 12.x.1993 – 20.viii.2005 (R. A. Beaver) (41); Chumphon, Mueang distr., 10° 25' 37.9'' N, 99° 03' 48.0'' E, 78 m, durian plantation, EtOH trap, 1.xi.–30.xi.2010 (W. Sittichaya) (10); Thung Tako Distr., 10° 02' 41.9'' N, 99° 01' 5.7'' E, 86 m, durian plantation, EtOH trap, 1.xi.–30.xi.2010 (W. Sittichaya) (9); Nakhon Nayok, Khao Yai NP, San Jao Khaokaew, 14° 22.96' N, 101° 23.253' E, 750 m, pan trap, 6–7.iii.2007 (W. Sukho) (1); Nakhon Sri Thammarat, Chang Klang Distr., 08° 20' 59.7'' N, 99° 40' 14.6'' E, 70 m, durian plantation, EtOH trap, 1.xi.–30.xi.2010 (W. Sittichaya) (14); Surat Thani, Bhan Nasan Distr., 08° 48' 57.3'' N, 99° 23' 52.2'' E, 62 m, durian plantation, EtOH trap, 1.xi.–30.xi.2010 (W. Sittichaya) (8); Ubon Ratchathani, Pha Taem NP, West of HuayPok substation, 15° 37.212' N, 105° 36.903' E, 438 m, pan trap, 10–11.iv.2007 (B. Sapsiri) (1).

Other distribution: From India and Sri Lanka through Southeast Asia and the Philippines to Indonesia, New Guinea and Australia, extending North to southern China, Taiwan and the Ryukyu Is. (4)

Biology: Polyphagous ( Dole & Cognato 2010). The biology is described by Kalshoven (1959) and Browne (1961a). Le Pelley (1968) notes that the species attacks green, living branches of coffee in Sri Lanka, but is not considered an important pest. In Thailand, attacks on mango and Michelia (Magnoliceae) were secondary on shaded and dying twigs and small branches.

Illustrations: P ( Dole & Cognato 2010, Hulcr 2013); D ( Nunberg 1959 as Xyleborus discolor, Maiti & Saha 2004 )