Milviscutulus mangiferae ( Green, 1889 )

Choi, Jinyeong, Soysouvanh, Pheophanh, Lee, Seunghwan & Hong, Ki-Jeong, 2018, Review of the family Coccidae (Hemiptera: Coccomorpha) in Laos, Zootaxa 4460 (1), pp. 1-62 : 42-44

Milviscutulus mangiferae ( Green, 1889)

( Figs 37 , 38 )

Lecanium mangiferae Green, 1889: 249 Diagnosis. Dorsum with anal plates pyriform, each with 4 apical setae ( Figs 37D , 38E ); dorsal setae clavate ( Fig. 38F ); duct tubercles present ( Fig. 38D ). Marginal setae spinose, mostly with fimbriate apices ( Fig. 38M ). Venter with multilocular disc-pores usually each with 7–10 loculi, present on posterior area of abdomen, occasionally with a few laterad of metacoxa ( Fig. 38K ); antenna 8 segmented ( Fig. 38P ) (partially adopted from Williams & Watson 1990; Hodgson 1994).

Material examined. 3 ♀♀, LAOS, Phou Khao Khuay National Bio-Diversity Conservation Area, Thaphabath Dist., Bolikhamsai Prov., 4.v.2015, coll. J.Y. Choi, on Mangifera indica L. ( Anacardiaceae ); 1 ♀, Vangvieng Dist., Vientiane Prov., 8.ii.2017, coll. P.P. Soysouvanh, on Chrysalidocarpus lutescens H. Wendl. (Arecaceae) .

Hosts. Polyphagous. According to García Morales et al. (2016), M. mangiferae has been recorded from plants belonging to 82 genera in 42 families. In Laos, it has been found on Dracaena sp. ( Asparagaceae ) and Ficus sp. ( Moraceae ) ( Suh & Bombay 2015).

Distribution. All zoogeographical regions; Oriental Region ( India, Indonesia, Laos, Malaysia, Philippines, Singapore, Sri Lanka, Taiwan, Thailand and Vietnam) ( Suh & Bombay 2015; García Morales et al. 2016).

Economic importance. Milviscutulus mangiferae was listed as a major pest of mango ( Mangifera indica ) in Israel, U.S.A. and the Pacific region ( Gill & Kosztarab 1997), causing yellowing, leaf drop, and death of branches ( Grimshaw & Donaldson 2007).

Remarks. Milviscutulus mangiferae is closely related to M. spiculatus Williams & Watson, 1990 , but is easily differentiated by having clavate or capitate dorsal setae and mostly fimbriate marginal setae; in contrast, M. spiculatus has flagellate to lanceolate but never bluntly clavate or capitate dorsal setae, and the marginal setae are mostly pointed. For comparisons with other species of Milviscutulus , see Williams & Watson (1990).

Figures

FIGURE 37. Milviscutulus mangiferae (Green, 1889). A, population of females in life; B, slide-mounted adult female; C, ventral tubular ducts near mesocoxa; D, anal plates. Scale lines for B = 0.5 mm; C = 10 µm; D = 100 µm.

FIGURE 38. Milviscutulus mangiferae (Green, 1889), adult female, from Williams & Watson (1990). A, simple pore; B, dorsal microduct; C, preopercular pore; D, dorsal tubercle; E, anal plates; F, dorsal setae; G, ventral seta; H1-2, ventral tubular ducts; I, anterior and lateral marginal setae on anogenital fold; J, leg; K, multilocular disc-pore; L, spiracular disc-pore; M, stigmatic spines and marginal setae; N, ventral microduct; O, preantennal pore; P, antenna.