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Aphidinae : Macrosiphini : Indomegoura indica
 

 

Indomegoura indica

Waxed orange aphid, Bladdernut-daylily aphid

On this page: Identification & Distribution Other aphids on the same host

Identification & Distribution

Adult apterae of Indomegoura indica (see first picture below) are orange yellow, but they are covered in white wax which obscures the colour. The eyes and antennae are black, the legs are brownish black, apart from yellowish femoral bases. The siphunculi are dark and the cauda light reddish-brown (cf. Myzus hemerocallis on Hemerocallis, which has antennae, legs and siphunculi mainly pale). The antennae are nearly as long as the body, with a few short hairs. Antennal segment III bears at its base 5 small circular secondary rhinaria. The antennal tubercles are fairly large, distinctly protruding and rounded on the inner side. The rostrum reaches to the second pair of coxae. The apical rostral segment (RIV+V) is 0.7-0.9 times the second hind tarsal segment (HTII) (cf. Indomegoura nigrotibiae on Staphylea, which has RIV+V 0.9-1.1 times HTII). The dorsum has only a few very short hairs. The siphunculi are relatively short, considerably constricted near the tip, and with a fine reticulation only at the extreme top-end; they are only slightly swollen (cf. Rhopalosiphoninus staphyleae on Staphylea, which has its siphunculi markedly swollen on the distal 0.7). The cauda is elongate, much longer than wide, and more than 0.5 times as long as the siphunculi (cf. Indomegoura nigrotibiae, which has the cauda triangular, less than 0.5 times as long as the siphunculi). The body length of adult Indomegoura indica apterae is 3.1-4.2 mm.

First image above copyright Huang Wen, second image copyright Capricornis,
both under a creative commons licence.

Alate viviparae of Indomegoura indica have the body orange, with much less wax than the aptera. Their antennae are mainly black, but with segments I, II and base of III dusky-yellow. The secondary rhinaria on segment III are circular, of various sizes, scattered along the full length, and varying in number from 50 to 70. The rostrum reaches to the second coxae. The veins of the front wings are narrowly bordered with dusky brown. The siphunculi are black, somewhat swollen near the middle and narrow at both ends, the apical end being smallest and reticulate for a short distance. The cauda is dusky orange.

Image above copyright Huang Wen under a creative commons licence.

The primary hosts of Indomegoura indica in Japan are Japanese bladdernut (Staphylea bumalda) and Korean sweetheart tree (Euscaphis japonica). It is recorded as common in the Tokyo area, feeding on the undersides of the branches, which may be severely affected. In summer this aphid host alternates to its secondary hosts, daylilies (Hemerocallis spp.), although observations by Takahashi (1923) on finding apterous sexuales, and apterous and alate males on the primary host, indicate that only part of the population migrates. The waxed orange aphid was first described in India, but it now known to have a wider distribution including Japan, Korea, China, and Taiwan.

 

Other aphids on the same host

Primary hosts

Indomegoura indica has been recorded on 2 bladdernut species (Staphylea bumalda, Staphylea japonica =Euscaphis japonica).

Secondary hosts

Indomegoura indica has been recorded on 7 species of Hemerocallis (Hemerocallis citrina, Hemerocallis dumortieri, Hemerocallis esculenta, Hemerocallis fulva, Hemerocallis lilioasphodelus, Hemerocallis littorea, Hemerocallis middendorfii)

Acknowledgements

We are grateful to Huang Wen & Capricornis for making their images of Indomegoura indica available for use under a creative commons licence.

We have used the species accounts given by van der Goot (1916), Essig & Kuwana (1918) (both as Rhopalosiphum indicum), Takahashi (1923) (as Amphorophora indicum) and Miyazaki (1971), together with information from Roger Blackman & Victor Eastop in Aphids on Worlds Plants. We fully acknowledge these authors and those listed in the reference sections as the source for the (summarized) taxonomic information we have presented. Any errors in information are ours alone, and we would be very grateful for any corrections. For assistance on the terms used for aphid morphology we suggest the figure provided by Blackman & Eastop (2006).

Useful weblinks

References

  • Essig, E.O. & Kuwana, S.I. (1918). Some Japanese Aphididae. Proceedings of the California Academy of Sciences 8(3), 35-112 (p. 55) . Full text

  • Miyazaki, M. (1971). A revision of the tribe Macrosiphini of Japan. Insecta Matsumurana 34(1), 1-247 (p. 43) Full text

  • Takahashi, R. (1923). Aphididae of Formosa I Report of the Department of Agriculture Government Research Institute Formosa 4, 1-97 (p. 87) Full text

  • van der Goot, P. (1916). On some undescribed aphids from the collection of the Indian Museum. Records of the Indian Museum 12(1), 1-4 (p. 1) Full text