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White Heads in Wheat
White heads caused by wheat stem maggot feeding often are observed in many fields. Typically, only 1 to 5 percent of the heads are affected, and they appear to occur scattered at random through the field.
With wheat stem maggot damage, the head and the stem down to the top node are dead, with the rest of the plant green. The head will pull out with a gentle tug, and usually there is evidence of insect chewing on the stem above the top node where it broke when pulled. Single heads are affected rather than the whole plant. These symptoms can be differentiated from white heads caused by common root rot. With root rot, typically the whole plant is whitened and the whole plant easily pulls from the soil, with browned or blacked roots, as well.
No chemical controls are available for wheat stem maggot.
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