Melanaphis sacchari

1 species of
insects
aphids. The main names are
Aphis sacchari
;
Longiunguis sacchari
. The host plants are weeds, sorghum, and sugar cane. With the exception of some provinces and regions in northwest China and Europe, they are almost universally distributed. It is a big pest in the sgao beam producing area of northern China, which often occurs in Northeast China, Inner Mongolia, Shanxi, Shandong, Hebei and other places. Cluster leaves on the opposite side of the juice, seriously make the leaves red, stalks bent, can not spike. Can spread the red leaf virus with millet. Wingless lone females grow up to 1.8
millimeters
length. Live yellow. Section 8
the
abdomen has a back strap and
2
roots. Sometimes section 7
and
as well as the rear chest have spots or bands. The body table is smooth. The length ratio


6
of tentacles is
100
:
87
:
70
:
31

139
. Not up to the mid-foot base section, the last section is long for the
2
section
0.85
times.3
3
3,
3
,
3
,
2
. Abdominal tube short cylinder shape, the length of the tail piece
0.82
times. The tail piece has
8

16
roots. Sections
1
to
4
and
7
of the winged female abdomen have spots, and sections
1
to
8
each have a crossband, sometimes interrupted. Tentacles section
3
has a ring-shaped secondary sensation circle
8
to
13
, arranged in an untidy row,
1
to
2
are located outside the column. The wings are thick and black.the fertilized eggs to winter between the grass base and the gap between the leaves and the base rod. In the spring, a lone female was born on the grass, and the
3
generation was winged, moving to the sorghum seedlings, breeding only on a small number of small leaves in the seedling base before the beginning of
7
, in small numbers.
July
, there was another spread of winged slugs spreading throughout the plant, reaching a
peak around
August 2008. In late autumn, winged mothers and winged males move to the grass. Female and male mating spawns over the winter.