Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: 7/20/2016
Publication Date: 10/13/2016
Citation: Li, S., Chen, P., Zhang, B., Shannon, G. 2016. Research on purple seed stain of soybean: germplasm screening and genetic resistance. In: Jarret, R.L., editor. Germplasm Characteristics, Diversity and Presevation. Hauppauge, NY; Nova Science Publishers, Inc. p.65-67.

Interpretive Summary: Soybean purple seed stain (PSS) causes seed decay and purple seed discoloration, resulting in overall poor seed quality and reduced market grade and value. It is a prevalent disease that also affects seed vigor and stand establishment. The most common symptom of this disease occurs on the seed. Infected seeds may appear healthy or have discoloration in seed coat varying from pink to light or dark purple spots, which range in size from a small speck to the entire seed coat. Warm and humid environments favor pathogen growth and disease development. Management strategies for this disease include crop rotation with non-legume or non-host crops, fungicide applications, and tilling the soil to disrupt spore dissemination. Along with these strategies, the use of resistant cultivars may provide more reliable and economical control of PSS, especially when environmental conditions are conducive for disease development. In this chapter, general information about PSS and an overview of research on germplasm screening and genetic resistance are presented and discussed.

Technical Abstract: Soybean purple seed stain (PSS) causes seed decay and purple seed discoloration, resulting in overall poor seed quality and reduced market grade and value. It is a prevalent disease that also affects seed vigor and stand establishment. PSS is caused by the fungus Cercospora kikuchii and other Cercospora spp. The most common symptom of this disease occurs on the seed. Infected seeds may appear healthy or have discoloration in seed coat varying from pink to light or dark purple spots, which range in size from a small speck to the entire seed coat. Warm and humid environments favor pathogen growth and disease development. Management strategies for this disease include crop rotation with non-legume or non-host crops, fungicide applications, and tilling the soil to disrupt spore dissemination. Along with these strategies, the use of resistant cultivars may provide more reliable and economical control of PSS, especially when environmental conditions are conducive for disease development. In this chapter, general information about PSS and an overview of research on germplasm screening and genetic resistance are presented and discussed.