Classification
Aphidinae: Macrosiphini
Diagnosis
Small yellowish aphid found usually in leaf galls. Honeydew globules are present inside the galls in the aphid colony. The aphid can be distinguished by the visible swelling of third antennal segment just after its basal articulation. Ants are not found attending this aphid. Antennae 0.4-0.5 times as long as body. Siphunculi shorter than cauda. Processus terminalis 2.2-2.7 times as long as base of last antennal segment. Siphunculi 0.06-0.07 times as long as body. Cauda 1.5 times longer than siphunculi.
Distribution
Europe, China, Japan, Korea, Taiwan, Middle East, North America, India (Arunachal Pradesh, Himachal Pradesh, Karnataka, Meghalaya, Uttar Pradesh, West Bengal, Tamil Nadu).
Host plant(s)
Chenopodiaceae: Chenopodium album L.; Anacardiaceae: Anacardium occidentale L.
The aphid was unable to form typical galls on the leaves of A. occidentalie and the colony remained restricted to the leaf petiole and partially on leaf midrib.
Measurements
Aptera: Length of body 1.76, width 0.92; antennae 0.81, segments III: IV: V: VI 0.24: 0.11: 0.11: (0.08+0.20); u.r.s. 0.11; h.t.2 0.11; siphunculus 0.12; cauda 0.18.
Seasonal occurrence
January-February, April-October.
Natural enemies
Coleoptera: Coccinellidae: Hippodamia variegata (Goeze).
Diptera: Syrphidae: Episyrphus balteatus (De Geer).