Basil Downy Mildew (Peronospora belbahrii): Discoveries and Challenges Relative to Its Control
2015
Wyenandt, Christian A. | Simon, James E. | Pyne, Robert M. | Homa, Kathryn | McGrath, Margaret T. | Zhang, Shouan | Raid, Richard N. | Ma, Li-Jun | Wick, Robert | Guo, Li | Madeiras, Angela
Basil (Ocimum spp.) is one of the most economically important and widely grown herbs in the world. Basil downy mildew, caused by Peronospora belbahrii, has become an important disease in sweet basil (O. basilicum) production worldwide in the past decade. Global sweet basil production is at significant risk to basil downy mildew because of the lack of genetic resistance and the ability of the pathogen to be distributed on infested seed. Controlling the disease is challenging and consequently many crops have been lost. In the past few years, plant breeding efforts have been made to identify germplasm that can be used to introduce downy mildew resistance genes into commercial sweet basils while ensuring that resistant plants have the correct phenotype, aroma, and tastes needed for market acceptability. Fungicide efficacy studies have been conducted to evaluate current and newly developed conventional and organic fungicides for its management with limited success. This review explores the current efforts and progress being made in understanding basil downy mildew and its control.
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