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yellow spot infection

Catalogue: GRDC Media
New Grains Research and Development Corporation (GRDC) research questions the value of fungicidal treatment of yellow spot in susceptible wheat, showing a maximum of just $1.50 profit gained for every one dollar spent... Richard Daniel, chief executive officer of the GRDC-funded Northern Grower Alliance (NGA) says results from 2011 research on EGA Gregory shows single applications of full registered rates of all fungicides evaluated reduced yellow spot severity by up to 50 per cent on the top three leaves... "Multiple fungicide applications did improve disease suppression to the tune of about 70pc reduction on the top three leaves but at the rates tested, there were no clear or consistent differences in disease suppression between the fungicides evaluated."..
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Catalogue: GRDC Updates
Disease data was assessed at each application timing and finally ~3-4 weeks after the T3 application... Figure 2 shows the performance of the range of fungicide treatments when applied at T2 (GS32-33) on disease levels assessed at GS75-83 (milk to soft dough)... The very early T1 application (~GS15) provided useful initial disease suppression but had negligible impact on the final disease levels assessed at the late milk to early dough stages...
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Catalogue: GRDC Media
Continued vigilance urged on yellow spot disease.. "Yellow spot was found in varieties such as Mace , Magenta and Wyalkatchem , which indicates that even putatively-resistant varieties can be susceptible to the disease," she said... Dr See said it was still recommended that growers chose varieties 'insensitive' to ToxA such as Mace , Magenta and Wyalkatchem as ToxA was the most potent of the identified effectors...
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