Agriculture Reference
In-Depth Information
Code
Name
Genus
a
Host range
b
Symptoms
Yield decreases
Vectors
Other information
O, g, s
2
, j, w, r
3
OYDV
Onion yellow
Potyvirus
Systemic leaf
Large, 40-60%
Aphids
Different strains in o & g
dwarf virus
striping; curling
in g depending
on cv.
4
of leaves and
scapes; stunting;
mosaic on g
LYSV
Leek yellow
Potyvirus
L, g, o
Yellow leaf
17-54% in g,
Aphids
Different strains in o & g
stripe virus
striping
varying with
cv.
4
SYSV
Shallot yellow
Potyvirus
S, o, j, w, r
Systemic
Aphids
S, j or w strains differ in
species infectivity range
5,6
;
stripe virus
yellow striping
nt
c
sequence more like
(Welsh onion
YSV a strain
5
)
OYDV than LYSV
7,8
S, g, o, l, j, cl, r
1
None obvious
2
SLV
Shallot latent
Carlavirus
Aphids
GLV, garlic latent, is a strain
virus
of SLV - shown by nt
sequence
9
and antiserum
reactions
10
G, l, ghg
1
None obvious
10
GCLV
Garlic common
Carlavirus
Aphids
Nt sequence distinct from
SLV
9
latent virus
Nt sequences of A,C
12
and
GarV-
Garlic virus A, B,
Allexivirus
G
GarV-A, 14-30%; Mites (
Aceria
X strains
13,14
A,B,C,D,
etc.
GarV-C,
tulipae
)
E,X
11
0-15%
11
SVX
Shallot virus X
Allexivirus,
S, o
None, or local
Mites (
Aceria
Probably same as shallot
(onion mite-
type species
chlorosis only
tulipae
)
mite-borne latent virus
for this genus
1
SMbLV
1
; similar mite-borne
borne latent
virus related)
1
virus in r
6
IYSV
15
Tospovirus
1
Iris yellow
O, s, l, c, some
Dry, straw-yellow
Up to 100% in
Thrips tabaci
,
Serious new disease in USA,
spot virus
wild alliums
lesions on leaves
seed crops;
disease
Brazil, Israel and Spain
and scapes; seed
smaller
parallels thrips
