71
May2014
DRYLAND
–SUMMERRAINFALLREGION
Cultivar
Reaction
Elands
MS
Gariep
S
Komati
MS
Matlabas
S
PAN 3118
S
PAN 3120
MR
PAN 3144
MR
PAN 3161
R
PAN 3355
MR
PAN 3368
MR
PAN 3379
MS
SST 347
MS
SST 356
R
SST 374
MR/MS
SST 387
R
DRYLAND
–WINTERRAINFALLREGION
Cultivar
Reaction
Baviaans
R
Kariega
R
Kwartel
R
PAN 3408
R
PAN 3434
R
PAN 3471
R
Ratel
R
SST 015
R
SST 027
R
SST 047
R
SST 056
MR
SST 087
R
SST 88
MR
Tankwa
R
IRRIGATION
–SUMMERRAINFALLREGION
Cultivar
Reaction
Baviaans
R
Buffels
R
Duzi
R
Kariega
R
Krokodil
S
Olifants
R
PAN 3434
R
PAN 3471
R
PAN 3478
R
Sabie
R
SST 806
R
SST 822
R
SST 835
MR
SST 843
R
SST 866
R/MS
SST 867
MR
SST 875
R
SST 876
MR
SST 877
R/MS
SST 884
R
SST 895
R
Steenbras
S
TABLE 2:WHEAT CULTIVARS RECOMMENDED FOR THE DIFFERENT REGIONSAND THEIR REACTIONS TO STRIPE INFECTION (ARC-SGI, CUL-
TIVAR EVALUATIONGUIDELINES, 2014).
R=Resistant
MR=Moderately resistant
MS=Moderately susceptible
S=Susceptible
It should be remembered that it is better to apply a fungicide
early rather than late. It is generally recommendednot to spray after
the soft dough stage as infections seldom result in a significant
yield loss.
Higherwater rates of 300 litre/ha aid fungicide coverage.
Resistant cultivars
Planting stripe rust resistant cultivars can be beneficial to farmers
and the environment as there will be little or no need for fungicide
applications to control thedisease.
A list of the recommended wheat cultivars and their stripe rust
resistance status for thedifferent regions are listed in
Table 2
.
Conclusion
It is advisable for producers to use recommended resistant
cultivars.
Regularmonitoringof fieldsbywalking through random strips in
the field is essential todetect thedisease at an early stage.
Fungicides are effective, provided that the timing and fungicide
application is correct. Correct timing is essential, as fungicides
cannot undodamage causedprior to spraying. However, further
damage canbeprevented.
Multiple fungicide applications may be required on highly
susceptible cultivars.
Contact KrishnaNaicker at 058 307 3436or
1:Wheat head infectedwith stripe rust.
2: Stripe rust symptoms onwheat leaves.
This researchwasmade possiblewith the financial assistance of the
Agricultural ResearchCouncil and theWinter Cereal Trust.
“
Stripe rust ismore
prevalentwhenweather
conditions are cool and
wet as this is ideal for
the proliferation of
the fungus.
“
