A New Record of Nannizziopsis mirabilis from Field Soil in Korea

                                        

1Gyeonggido Agricultural Research and Extension Services, Hwaseong 18388, Korea
2Department of Biology, Kunsan National University, Gunsan 54150, Korea

Abstract

Basil (Ocimum spp.) is a popular herb grown worldwide. During the past fifteen years, a downy mildew pathogen has caused considerable damage to basil cultivations. In August 2017, downy mildew disease symptoms were found on Basil Tree (or long foot Basil Tree), which was developed by the grafting of two basil varieties and is a continuous harvest plant with a woody trunk. The present study reports the occurrence of downy mildew disease in basil Tree and identifies the causal pathogen, as Peronospora belbahrii.

Figures & Tables

Fig. 1. Morphological characters of KNU17-67 grown on potato dextrose agar for 7 days at 25°C. A, Front colony; B, Back colony; C, Simple microscopic picture of conidia; D, Simple microscopic picture of apical conidia; E, Scanning electron microscopic picture of terminal conidia; F, Scanning electron microscopic picture of apical and terminal conidia; G, H, Scanning electron microscopic picture of ascospores.