Biology Reference
In-Depth Information
103
Liosomaphis berberidis
(Kaltenbach) (
103
)
Barberry aphid
This greenish-yellow, orange or pinkish aphid infests
barberry (
Berberis
), colonies developing throughout the
summer on the young shoots and underside of leaves.
Apterae are 2.0-2.5 mm long, with pale legs and
antennae, and noticeably swollen siphunculi. Little or
no damage is caused.
Longicaudus trirhodus
(Walker) (
104-105
)
Compact colonies of this pale yellowish-green
(2.0-2.7 mm long) species develop on wild and
cultivated columbine (
Aquilegia vulgaris
) during the
summer months; meadow-rue (
Thalictrum
) is also a
summer host. The aphids are unusual in possessing
short siphunculi and a long cauda. Winged aphids,
which have an irregular black mark on the abdomen,
migrate to rose (
Rosa
), the winter host; small colonies
are produced on this woody host in the spring, before a
return migration to summer hosts takes place in June.
103
Colony of barberry aphid (
Liosomaphis berberidis
) on
Berberis
.
104
Macrosiphoniella sanborni
(Gillette)
Chrysanthemum aphid
A generally common pest of
Chrysanthemum
. Of
eastern Asian origin but now cosmopolitan. Widely
distributed in Europe.
DESCRIPTION
Apterous female:
1.0-2.3 mm long; shiny, dark
reddish brown to blackish brown; siphunculi black,
short and stout; cauda black and elongate, slightly
longer than siphunculi.
Alate:
1.8-2.6 mm long; similar
to aptera.
104
Colony of
Longicaudus trirhodus
on leaf of
Aquilegia
.
105
LIFE HISTORY
This species occurs on cultivated chrysanthemum in or
near greenhouses, and reproduces parthenogenetically
throughout the year. The aphids colonize the underside
of leaves, and also infest the buds and flower stems.
Winged forms are produced during the summer months,
and these help to spread infestations from place to
place, but there is no sexual phase in the lifecycle.
DAMAGE
Infested buds and flowers are malformed. The aphids
transmit viruses such as chrysanthemum vein mottle
virus and chrysanthemum virus B.
105
Apterous female and nymphs of
Longicaudus trirhodus
on leaf of
Rosa
.
Macrosiphoniella absinthii
(Linnaeus) (
106
)
syn.
M. artemisiae
(Buckton);
M. fasciata
del Guercio
Infestations of this widely distributed species are
sometimes reported on cultivated wormwood
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