Dr. Kemerait sent out a disease update this morning about striped rust in wheat. I have observed stripe rust in a couple of wheat fields in Irwin County. One field was already at heading and warranted treatment where some we are monitoring. Below is a message from Dr. Alfredo Martinez about management of Striped Rust.
As this is stripe rust on wheat, I have asked Dr. Alfredo Martinez for his input. Here are his thoughts….”Stripe rust, Puccinia striiformis f. sp. tritici). The first sign of stripe rust is the appearance of yellow streaks (pre-pustules) followed by small, bright yellow, elongated uredial pustuals arranged in conspicuous rows on the leaves, leaf sheaths, glumes, and awns. Mature pustules will break open and reveal yellow-orange masses of urediniospores. In some varieties, long, narrow, yellow stripes will develop on the leaves. Note that stripe rust can develop at lower temperatures on wheat than do other rusts. Control is through field monitoring; our agents should become familiar with strip rust symptoms and anticipate environmental conditions that are conducive for the disease. Check fields periodically and early in the season. Use of resistant varieties is the best was to control stripe rust; if stripe rust appears in a field then a fungicide should be applied as soon as possible. Effective fungicides include tebuconazole, propiconazole, Proline, Prosaro, Caramba, or any mix that has a DMI fungicide in it.”
