Field Pea disease reaction tables/guides

Table 7.1 Field pea variety disease reactions

VARIETY Blackspot (Ascochyta) Bacterial Blight (Field Rating)

Downy Mildew (Parafield Rating)

Downy Mildew (Parafield Strain) Powdery Mildew PSbMV Virus BLRV Virus (Field Rating)
                                                                                                                                                         Kaspa Grain Type
PBA Twilight MS S R S S S S
PBA Gunyah MS S R S S S S
Kaspa MS S MR S S S S
PBA Wharton MS S R S R R R
                                                                                                                                                Australian Dun Grain Type
PBA Oura MR/MS MR/MS MR MS S S MS-MR*
PBA Percy MS MR MR MS S S MR
Morgan MS MS R S S S S*
Parafield MS MS S S S S S
                                                                                                                                                          Niche Grain Type
PBA Hayman S* MR* MR - R* - -
PBA Pearl MS MS R S S S R
Sturt MS MS-MR MS S S S MS-MR*
Excell MS S MR S S S S

Disease tolerance:

R = resistant MR = moderately resistant MS = moderately susceptible S = susceptible VS = very susceptible PSbMV = Pea seed borne mosaic virus BLRV = Bean leaf roll virus * Requires validation

 

Table 7.2 Field pea disease guide summary

Disease Organisms Symptoms Occurrence Hosts Control
Ascochyta
blight
Didymella pinodes
(synonym:
Mycosphaerella
pinodes
), Phoma
medicaginis var
.
pinodella, Phoma
koolunga and
Didymella pisi.
Most obvious on stems and leaves.
Purplish-black discolouration of lower
stem. Dark brown spotting of pods and
leaves. Blackening of tap root
Common in all pea growing regions;
most crops are affected to some
extent. Favoured by wet conditions.
Most damage in early sown crops
Peas and most
legumes
Crop rotation.
Later sowing.
Seed dressings.
Disease free seed
Bacterial
blight
Pseudomonas
syringae
pv. pisi
and
P.syringae pv.
syrinage
Water-soaked spots on leaflets and
stipules. Yellowish brown fan-shaped
lesion on stipules
Sporadic in wetter regions. Most
severe in early sown crops already
damaged by frost or heavy rain
Peas for pv. pisi and
alternate hosts for
pv. syringae
Crop rotation.
Disease free seed.
Resistant varieties
Downy
mildew
Peronospora viciae Brown blotches on upper leaf surface.
Underside of leaves covered by masses
of fluffy ‘mouse-grey’ spores
Sporadic in all regions. Damage
most severe in wetter districts
Peas Resistant varieties.
Seed fungicide
treatment
Powdery
mildew
Erysiphe pisi Leaves covered by a film of powdery
white spores. Infected plants have a
blue-white colour
Can occur in most regions towards
the end of the season. Most
common in late-sown crops
Peas Resistant varieties.
Avoid late sowing.
Apply Foliar fungicide
at flowering as an
economic option for
disease prone areas
Septoria leaf
blotch
Septoria pisi Straw coloured blotches on leaves,
stems and tendrils. Pin-head size black
spots within lesions
Present in most pea growing
regions. Damage most severe on
short, semi-leafless cultivars
Peas Destroy crop
residue. Most
varieties are
moderately
susceptible. Crop
rotation
Pea seed
borne mosaic
virus
Virus Downward curling of leaves, mosaic,
stunting
Present in all pea growing regions The host range is
limited to Fabaceae
This virus is highly
seed-borne in peas.
Virus-free seed is
recommended
Beet western
yellow virus
Virus Yellowing and stunting Prevalent in all pea production
areas
Very wide host
range. Most pulses
and brassicas and
many weed species
Managing aphids
and weeds, resistant
varieties

 

VIRUSES AFFECTING FIELD PEA

Diseases in Legumes: Lentils