List of Fact Sheets | Glossary

Classification

Lachninae: Lachnini

Common name(s)

Giant willow aphid

Diagnosis

Very large aphids of 5 to 5.8 mm length, always colonise on woody plant parts and lower surface of old leaves. Abdominal dorsum pale, membranous, bearing some dark markings on first to sixth tergites, besides a slender sclerotic transverse band on eighth tergite. Fourth tergite with a large, conspicuous dark brown to black conical dorsal tubercle. Siphunculi on large dark hair bearing cones. Legs black with basal portion of femora reddish. Antennae almost half of the body length. Processus terminalis 0.58 times as long as the base of last antennal segment. Wing venation normal.

Host plant(s)

Salicaceae: Salix tetrasperma Roxb.

Measurements

Aptera: Length of body 5.8, width 3.5; antennae 2.8, segments III: IV: V: VI: 1.21: 0.45: 0.55: (0.17+0.10); u.r.s. 0.24; h.t.2 0.33; siphunculus, base 0.55, apex 0.16.
Alata: Length of body 5.36, width 2.8; antennae 2.00, segments III: IV: V: VI: 0.75: 0.30: 0.33 (0.21+0.06); u.r.s. 0.20; h.t.2 0.36; siphunculus, base 0.69, apex 0.14.

Seasonal occurrence

March-May and September-October.

Natural enemies

Hymenoptera: Braconidae: Aphidiinae: Lipolexis scutellaris Mackauer, Pauesia salignae (Watanabe).