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Catalogue: Grains Notes DEPI VIC
The yellow dwarf diseases of cereals have now been divided into two groups, barley yellow dwarf virus (BYDV) and cereal yellow dwarf virus (CYDV)... Where resistant varieties are not an option the management of aphid activity in crops especially early in the season to prevent its spread and or delayed sowing to avoid the main aphid flights in the autumn can reduce YDV infection... Later sowing to avoid the main aphid flights will reduce the incidence of YDV but this needs to be weighed up against possible yield reduction from delayed sowing...
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Catalogue: GRDC Media
Herbicide application around the time of cold weather can further exacerbate the development of yellowing and physiological spotting as it slows the rate that the cereal crop can metabolise the chemical... The chemical tends to concentrate in the leaf tips where it can become phytotoxic resulting in yellowing and spotting (Figure 1 and 2)... Figure 2: Yellowing of barley leaf tips following cold weather and frosts at Condobolin in 2014 and production of brown physiological spots...
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Catalogue: GRDC Media
Herbicide application around the time of cold weather can further exacerbate the development of yellowing and physiological spotting as it slows the rate that the cereal crop can metabolise the chemical... The chemical tends to concentrate in the leaf tips where it can become phytotoxic resulting in yellowing and spotting (Figure 1 and 2)... Figure 2: Yellowing of barley leaf tips following cold weather and frosts at Condobolin in 2014 and production of brown physiological spots...
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Catalogue: GRDC Updates
Control inoculum levels and you can control this disease.. If you only read this one sentence you will know a great deal of what there is to know in avoiding yellow leaf spot (YLS) epidemics in the majority of seasons in SNSW; don't sow susceptible varieties into stubbles containing moderate to high levels of inoculum... Such as those described in Street and Brill (2012) in central NSW or Beard and Smith in Western Australia (2012) have demonstrated that a program of early and repeated spraying is required to minimise the potential losses of the disease in susceptible varieties...
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