[Fhb-update_ma] FHB Update from MD, 05/29/14

FHB Updates - Mid Atlantic SWW Region fhb-update_ma at scabusa.org
Thu May 29 05:43:51 PDT 2014


Almost all the wheat has flowered in Maryland. Only a few late planted
fields in the northern tier may still be candidates for a fungicide
decision. Risk remains low even with the scattered storms and showers moving
through and is not expected to increase. Fungicide applications for scab are
not warranted. All growers should examine their fields about 3 weeks after
flowering for scab symptoms. Fungicide applications will only suppress scab
and even low risk fields may still have a low level of infection. Symptoms
are premature bleaching of the spikelets, producing a partial or full white
head before the crop matures naturally. A diagnostic characteristic is a
pink to salmon-colored spore mass on parts of the head under humid
conditions. Spore masses are not always present. Fields where scab symptoms
are observed should be harvested with higher fan speed settings to blow out
the heavily infected seed which tends to be light in weight. This harvest
technique will reduce the vomitoxin content of the final product.

--Arv Grybauskas, Extension Plant Pathologist, University of Maryland

For more details, go to the FHB Risk assessment tool at
http://www.wheatscab.psu.edu



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