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existing infection

Catalogue: GRDC Media
Reap rewards with early action on powdery mildew.. The Grains Research and Development Corporation (GRDC) is urging mungbean growers to take a proactive approach to powdery mildew control this season to maximise crop yield potential and capitalise on the current bullish market... "Infections typically become apparent during February and usually increase in severity during March and April...
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Catalogue: GRDC Media
The Grains Research and Development Corporation (GRDC) is urging mungbean growers to take a proactive approach to powdery mildew control this season to maximise crop yield potential and capitalise on the current bullish market... Storm rain across parts of the northern cropping region has sparked concern among growers over the potential for powdery mildew disease outbreaks and raised questions over appropriate management strategies... "Infections typically become apparent during February and usually increase in severity during March and April...
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Catalogue: GRDC Updates
Sowing a susceptible wheat variety on stubble of a previously infected susceptible variety (e.g. Gregory-on-Gregory) represents a much higher risk for developing high levels of yellow spot... The incidence and severity of yellow spot increases as moisture periods lengthen such that it takes repeated rain events to drive the disease from the lower to the upper canopy later in the season... Yellow spot is generally considered a significant disease in very wet seasons (e.g. 1998 and 2010) where yield losses of up to 30% have been recorded in susceptible wheat varieties...
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Catalogue: GRDC Updates
Sowing a susceptible wheat variety on stubble of a previously infected susceptible variety (e.g. Gregory-on-Gregory) represents a much higher risk for developing high levels of yellow spot... The incidence and severity of yellow spot increases as moisture periods lengthen such that it takes repeated rain events to drive the disease from the lower to the upper canopy later in the season... Yellow spot is generally considered a significant disease in very wet seasons (e.g. 1998 and 2010) where yield losses of up to 30% have been recorded in susceptible wheat varieties...
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