Presence of Rhizoctonia solani AG-1 IB on Lavandula officinalis and Origanum vulgare cultivated in Italy.
Rhizoctonia solani has been isolated from several young plants of Lavandula officinalis and Origanum vulgare, both growing in the same farm located near Albenga (Savona province, northern Italy). Symptoms on the hosts are described. The microorganisms isolated from both the hosts were identified as Rhizoctonia solani observing the features of mycelium grown in vitro. The identification was confirmed by the ITS (Internal Transcribed Spacer) analysis. The characterization of both the isolates permitted to include them to the anastomosis group AG-1. The description of mycelium and sclerotia grown in vitro were typical of R. solani AG-1 IB (Type 1 of Sherwood). Finally, some strategies are given to prevent and to control R. solani on L. officinalis and O. vulgare. R. solani is reported on L. officinalis and on O. vulgare for the first time in Italy.