Evaluation of certain essential oil to control of bacterial soft rot of potato caused by Pectobacterium carotovorum subsp. carotovorum

الملخص EN

Pectobacterium carotovorum subsp.

carotovorum is considered one of the most important and wide spread bacterial pathogen that is responsible for great and destructive losses to the production of potato worldwide leading to the loss of hundreds of tons in the fields, transit or even during the shipment.

The present study mainly carried out to assess the antibacterial activity of three essential oils against P.

carotovorum subsp.

carotovorum as the bacterial causal pathogen of potato tuber soft rot disease.

This assessment achieved within in vitro and in vivo studies to make complete suppression of soft rot disease.

Ten isolates of pathogenic bacteria, P.

carotovorum subsp.

carotovorum were isolated from naturally diseased potato tubers.

They identified as P.

carotovorum subsp.

carotovorum according to some different microbiological characteristics such as morphological.

Tested oils showed inhibition of the bacteria growth and in vitro experiment the best oils caused inhibition of the growth is thyme oil, colve and cumin according these results we used these oils to control the disease on potato tuber.

In conclusion we could recommended that use of thyme oil at concentration 10 mg to protect potato tuber from infected of pathogen under storage conditions.