Baytan has kept powdery mildew in check until growth stage 6-7. Powdery mildew is just beginning to be seen on Southern States 555W treated with Baytan. Wheat spindle streak mosaic virus is a disease caused by a virus that is transmitted by a soilborne fungus. It produces symptoms that can be confusing. The slender yellow dots and dashes that tend to be spindle shaped are seen on the leaves over most of the field.
Symptoms can be worse in low spots.
The chlorotic yellow spots can look like nutrient deficiencies or early powdery mildew infections that have not produced any spores. Testing can be done by sending samples to an outside lab. Contact your county agent for details. Often the symptoms disappear when warm weather arrives. Yield losses are only thought to occur if symptoms persist on the flag leaves once grain fill begins.