Withthe period for T3 ear fungicides approaching for more forward crops, wheatgrowers are being reminded to follow best practice to track and manage fusariumrisk during the flowering period.
Infectionof wheat ears by Fusarium speciescan result in mycotoxin development, particularly when weather is warm and wetat flowering.
DrDhan Bhandari, HGCA Research and Knowledge Transfer Manager, said: HGCAsmycotoxin risk assessment and guidelines contain best practice information,supported by the supply chain, to help growers manage fusarium mycotoxins.
Thescores in the pre-flowering section of the risk assessment are already knownas these scores are based on risk events that occurred during or beforedrilling such as region, previous crop, cultivation method and variety.
Atpresent, growers need to deal with the more tricky elements of fusariummycotoxin risk driven by the weather.
Ifhigh rainfall is anticipated over the flowering period, growers should considerapplying a robust dose of a T3 ear fungicide especially where pre-floweringrisk scores are also high.
Spraydecisions can also be guided by the fusarium monitoring service provided byCropMonitor (www.cropmonitor.co.uk).
DrBhandari continued: Every two weeks from GS31, CropMonitor provides details ofassessments of fusarium head blight (FHB) levels on untreated wheat plots atfive sites located in the high risk region.
Theservice also indicates the FHB-causing species present, which is informative,as although Microdochium species can infect cereals and cause FHB, thesespecies do not produce mycotoxins.
But,it is important to remember such services can only provide an indication ofrisk levels at the monitored sites and risks in particular fields are likely todiffer.
Thebest way to understand and manage in-field mycotoxin risks is to follow thestep-by-step approach detailed in the HGCA risk assessment and, where possible,include actual rainfall figures from each field.
Raingauges are an affordable way to ensure accurate measurement of rainfall duringthe crucial GS5969 and GS87harvest periods.
Tohelp growers track risk throughout the season, HGCA has updated the mycotoxinrisk assessment and associated guidelines which are being sent to growers withthe summer (May) edition of HGCAs Grain Outlook.
Forfurther information, visit www.hgca.com/mycotoxins