Assessing the benefits of pyramids and seed treatments for soybean aphid host plant resistance
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The Iowa State University Integrated Crop Management Conference is Iowa's premier crop production education event. No other program in Iowa brings together the diverse range of topics, slate of expert presenters and results of the latest University research.
The ICM Conference offers workshops focusing on the latest in crop production technology. Experts from Iowa and surrounding states will provide research updates and results in soil fertility, soil and water management, crop production and pest management.
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Abstract
Soybean aphid resistant varieties were first released commercially in 2010. Currently all commercially available resistant varieties incorporate the Rag1 (Resistance to Aphis glycines) gene. Research from the past three years have shown: Across multiple states and years, Rag1 containing-soybeans have fewer aphids than aphid-susceptible soybeans; When aphids are present in a field, Rag1 containing-soybeans are never aphid free (Mardorf et al. 2010); Rag1 does not limit yield (Kim and Diers 2009, Mardorf et al. 2010); and Combining Rag1 and Rag2 in a soybean line provides more resistance than Rag1 or Rag2 alone (Wiarda et al. 2011).