How to protect vulnerable crops anainst Mack root rot attack

摘要

Thielaviopsis hasicola can attack vulnerable crops of cyclamen, poinsettia, primula, impatiens, begonia, lavender, nicotiana, geranium, viola and sweet peas. Around 120 species in 15 families are known to be susceptible to black root rot.Accurate identification is important because although black root rot symptoms appear similar to those of damping off (caused by Pythium species), the fungi belong to two different groups. Fungicides used to control oomycete fungi such as Pythium and Phytophthora have little or no effect on Thielaviopsis.