Southern corn leaf blight (SCLB) is a fungal disease of maize caused by the plant pathogen Bipolaris maydis (also known as Cochliobolus heterostrophus in its teleomorph state). The fungus is an Ascomycete and can use conidia or ascospores to infect. [1]

2019年3月19日 · Southern corn leaf blight is caused by the fungus Bipolaris maydis. There are two races of the pathogen. Race O normally attacks only leaves. Lesions are tan, somewhat rectangular in shape, and have reddish-brown margins. Race T attacks leaves, husks, stalks, leaf sheaths, shanks, ears, and cobs.

Southern leaf blight is a fungal disease that thrives in warm-temperate corn-growing environments, including the southeastern United States. In this disease guide, learn more about the symptoms, including how to differentiate southern leaf blight from gray leaf spot, its impact on the crop and management considerations.

The southern corn (Zea mays L.) leaf blight (SCLB) epidemic of 1970–1971 was one of the most costly disease outbreaks to affect North American agriculture, destroying 15% of the crop

2015年10月5日 · Southern corn leaf blight (SCLB), caused by the fungus Cochliobolus heterostrophus (also known as Bipolaris maydis), has been observed at several locations in the Lower Rio Grande Valley in the fall corn crop this past month. The typical symptoms are oval to slightly elongated lesions, ¼ inch to 1 inch long (Figure 1).

Race O causes long, tan, lesions that have brown borders on leaves. Race T and race C are known to be specifically virulent to corn with cytoplasm male-sterile T and cytoplasm male-sterile C, respectively. Since the switch from cytoplasm male sterile T to normal cytoplasm corn, race T is not considered to be a threat.

Southern corn leaf blight, caused by the Bipolaris maydis fungus, is most likely to occur in areas with a damp, humid climate where temperatures range from 68 to 89 degrees F. The disease does not develop or slows during sunny, dry weather.

Southern Corn Leaf Blight • Caused by Bipolarismaydis • Considered to be a “warm to hot temperature” disease • Favored by temperatures of 20 to 32 C • Most commonly observed in fall or late spring season • Aggressive on both newly expanded and older leaf tissue • Varietal resistance is available but not common

Southern corn leaf blight produces small, elongated (up to 1-inch long) parallel-sided lesions that are tan with brownish borders (Figure 8). Symptoms vary considerably on different corn products, often requiring microscopic examination of the fungal structures to confirm diagnoses.

2022年7月25日 · Tan spots on corn leaves might mean that your crop is suffering from southern corn leaf blight. This devastating disease can ruin the season's harvest. Find out if your corn is at risk and what to do about it in this article.