In alfalfa, "A. eutiches" is especially damaging in conjunction with "Phytophthora medicaginis", which causes Phytophthora root rot (PRR) in alfalfa. After initial studies in Wisconsin, "A. euteiches" was identified as an economically significant alfalfa pathogen in other states as well. In Wisconsin, Iowa and Kentucky it often exceeds "P. medicaginis" in prevalence in fields where alfalfa is grown. Due to these diseases, conventional advice was to avoid growing alfalfa in any wet soils. However, with the development of ARR- and PRR-resistant varieties, wet soil conditions have become less of a concern for alfalfa production, at least as far as disease pressure is concerned. Today, modern alfalfa varieties are required to have both PRR and ARR resistance.