If late-summer alfalfa seedings fail this fall due to root rot diseases related to excessive rainfall, it should be safe to plant alfalfa again next spring, say Doo-Hong Min and Richard Lee, Michigan State University crop and soil scientists. The key factor: Compounds that cause autotoxicity do not accumulate in seedlings. Min and Lee recommend replanting the failed seedings with varieties offering resistance to Phytophthora and Aphanomyces root rot and treated with Apron XL. They also advise reseeding as early as possible in spring. For a more detailed discussion of root rot problems related to excessive fall precipitation, go to www.ipm.msu.edu/.