Hosts:
Poplars are the primary host
but secondary hosts include a range of Asteraceae, including lettuce.
Distribution:
Widespread in the northern hemisphere
and through the Oriental region to Australia and New Zealand.
Identification:
Wingless females live on the
roots of plants and are short and globular. Both winged and wingless females
lack siphunculi on the abdomen. They also have short antennae bearing transverse
sensory pits (these are spherical in most aphids) and the apical segment
has the thick basal section longer than the tapering processus terminalis.
In other aphids, the processus terminalis is many times longer than the
basal section of segment six as illustrated in the key. |
