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Soybean cyst nematode resistant soybean varieties are becoming less effective

Resistant soybean varieties have helped farmers manage soybean cyst nematodes (SCN) for decades. Almost all SCN-resistant soybean varieties possess the same resistance genes, from a soybean breeding line called PI88788.

Recently, Iowa State researchers analyzed 25 years of data, from tens of thousands of four-row variety evaluation research plots, to look for long-term trends. The results, published in the scientific journal Plant Health Progress, showed a breakdown of resistance in SCN-resistant varieties. 

July 28, 2017  By High Plains/Midwest Ag Journal