You are here

early infection

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...
Related categories:
Catalogue: GRDC Factsheets
When faced with foliar fungal diseases in cereals, control and damage limitation strategies need to be tailored to the rainfall region, variety resistance status and the disease... Foliar fungal diseases of wheat and barley, such as stripe, leaf and stem rust as well as powdery mildew, can result in substantial losses in all but resistant varieties if left unchecked (Figure 1)... yield increases of 56 per cent have been obtained from GS71 (watery ripe stage) applications in research conducted in WA...
Related categories:
Catalogue: GRDC Factsheets
When faced with foliar fungal diseases in cereals, control and damage limitation strategies need to be tailored to the rainfall region, variety resistance status and the disease... Foliar fungal diseases of wheat and barley, such as stripe, leaf and stem rust as well as powdery mildew, can result in substantial losses in all but resistant varieties if left unchecked (Figure 1)... yield increases of 56 per cent have been obtained from GS71 (watery ripe stage) applications in research conducted in WA...
Related categories:
Catalogue: GRDC Factsheets
When faced with foliar fungal diseases in cereals, control and damage limitation strategies need to be tailored to the rainfall region, variety resistance status and the disease... Foliar fungal diseases of wheat and barley, such as stripe, leaf and stem rust as well as powdery mildew, can result in substantial losses in all but resistant varieties if left unchecked (Figure 1)... yield increases of 56 per cent have been obtained from GS71 (watery ripe stage) applications in research conducted in WA...
Related categories:
Catalogue: Ground Cover
Monitoring canola crops for blackleg and sclerotinia is essential for making informed decisions about managing these diseases.. The Blackleg Management Guide fact sheet available on the GRDC website describes how to monitor crops and lists all the management practices available.. Dr Lindbeck says foliar fungicides need to be considered in districts at high risk of disease development (areas where disease frequently occurs and where canola has a long flowering period and there is reliable spring rainfall)...
Related categories:
Catalogue: Ground Cover
Monitoring canola crops for blackleg and sclerotinia is essential for making informed decisions about managing these diseases.. The Blackleg Management Guide fact sheet available on the GRDC website describes how to monitor crops and lists all the management practices available.. Dr Lindbeck says foliar fungicides need to be considered in districts at high risk of disease development (areas where disease frequently occurs and where canola has a long flowering period and there is reliable spring rainfall)...
Related categories:
Catalogue: NVT Online Papers
Destroy wheat volunteers that will harbour rust in autumn... For susceptible to intermediate varieties, if there is a high risk of local carryover associated with 'green bridge' (see below), use fungicide at seeding or spray fungicide at stem elongation to prevent early infection... If crops have not received early fungicide protection, commence monitoring for stripe or leaf rust at early stem elongation (first node stage, Z31 Figure 1) and apply fungicide at the first sign of infection, according to Table 3...
Related categories:
Catalogue: GRDC Updates
Cereal growth stages and decision making for fungicide timing.. The problem which soon became apparent to growers and advisers is that in the paddock it was difficult to calculate whether you had reached this disease threshold, not least because of the sporadic nature of the initial foci of the disease... Trial work on stripe rust control (GRDC project SFS00006 - 2002- 04) quickly established that foliar fungicide applications based on growth stages and applied between second node (GS32) and flag leaf emergence (GS39) or at both timings gave good control of the disease...
Related categories:
Catalogue: Ground Cover
Control yellow leaf spot (YLS) inoculum levels to control the disease.. New South Wales Department of Primary Industries plant pathologist Dr Andrew Milgate advises growers who wish to avoid YLS epidemics in their crops to look carefully at crop growth stage and seasonal conditions before spraying and to adopt a range of non-chemical strategies to control inoculum levels... When the fungicide wears off, reinfection can occur rapidly, particularly if weather conditions are conducive...
Related categories: