Trending Pathology: A blog by Trical Diagnostics

In California, increasing numbers of cases of black root rot of lettuce have been documented in 2017 and especially in 2018. This continuing trend shows that this disease is becoming more important to lettuce growers on the coast. Because black root rot of lettuce can result in symptoms similar to those caused by other diseases, […]

In California in 2017 and 2018, parsley fields in coastal counties showed signs of a root disease. Affected plants were stunted. The root systems were reduced and few small feeder roots remained, since most of the small roots had rotted away. The main taproots were dark and discolored both externally and internally. Leaves turned yellow […]