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Aphidinae : Macrosiphini : Brachysiphoniella montana
 

 

Brachysiphoniella montana

Asian waxy grass aphid

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

Identification & Distribution

Adult apterae of Brachysiphoniella montana (see two pictures below) are dirty greenish-brown in colour, but this is largely obscured by a thick coat of white mealy wax on the head, body and tibiae. Their antennae are dark greenish brown, less than half the body length and with the terminal process about twice as long as the base of antennal segment VI. The apical rostral segment is at most 1.3 times as long as wide at its base. Abdominal tergites I and VII are without marginal tubercles. The tibial hairs are short, not longer than the width of the tibia at midlength. The siphunculi are short, black, broad-based cones, not longer than wide at their base, with a distinct apical rim around a large terminal pore. The cauda is long, black and finger-like with a midway constriction, and bears 12-19 hairs. The body length of the adult Brachysiphoniella montana aptera is 1.1-1.9 mm.

Images above by permission, copyright Sunil Joshi & Poorani, J. Aphids of Karnataka (accessed 12/2/20).

We have been unable to find a description of the alate vivipara, although judging from the presence of fourth instar future alatae in photos (see picture below), they are not uncommon. Immatures tend to appear grey, rather than white, because of a less dense wax coating.

Image above by permission, copyright Sunil Joshi & Poorani, J. Aphids of Karnataka (accessed 12/2/20).

Brachysiphoniella montana is found on the upper surface of grass leaves, usually near or in water. Host plants include Leersia (L. hexandra), Cynodon (C. plectostachyus), Eleusine, Microstegium, Miscanthus, Oryza, Panicum, Pennisetum and Phragmites. It is thought to be mainly anholocyclic but, at least in Korea and possibly Japan, there is evidence of host alternation to pear (Pyrus spp.). Brachysiphoniella montana is known from India, Bangladesh, Nepal, China, Taiwan, Vietnam, Korea, Japan, Philippines, Malaysia, Indonesia, and Australia.

 

Other aphids on the same host

Primary hosts

Brachysiphoniella montana has been recorded from 4 pear species (Pyrus communis, Pyrus macrostipes, Pyrus montana, Pyrus ussuriensis).

Secondary hosts

Brachysiphoniella montana is known from 1 Cynodon species (Cynodon plectostachyus)

Brachysiphoniella montana occurs on 1 Leersia species (Leersia hexandra).

Brachysiphoniella montana occurs on 1 Phragmites species (Phragmites australis).

Acknowledgements

We are very grateful to Sunil Joshi & J. Poorani for permitting us to use their images from Aphids of Karnataka.

Identification was made by the photographers noted above and by us from the photos of living and/or preserved specimens. We have used the keys and species accounts of van der Goot (1917) and Miyazaki (1971) along with information from Aphids of Karnataka and 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 identification or 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

  • Miyazaki, M. (1971). A revision of the tribe Macrosiphini of Japan (Homoptera: Aphididae, Aphidinae). Insect matsumurana 34(1), 1-247 Full text

  • van der Goot, P. (1917). Zur kenntnis der blattlause Java's. Contributions a la faune des Indes Nederlandaises 1(3), 301 pp (p. 119).