The presence of Xanthomonas bacterial leaf streak disease has been recently confirmed in Nebraska, Colorado, Iowa, Illinois, and Kansas. Although the disease has only been found in western Corn Belt states, pathologists are conducting surveys to determine if it is more widely spread.
Until recently, this disease has not been observed in the United States. Bacterial leaf streak causes typical leaf disease symptoms on corn such as elongated lesions that run with the leaf’s vasculature, water-soaked margins of the lesions, and lesions that turn tan to brown as tissue becomes necrotic.
It is important to remember that because this new disease is caused by bacterial infection (like Goss’ Wilt), fungicides will not be effective at controlling it.
Ongoing research will be conducted to determine the impact Xanthomonas bacterial leaf streak will have on corn yields, however, it is important to note that throughout the observation of this disease over the past several years, no yield loss has been documented. For more information about the disease, click here.